CA2327919C - Internal line control system - Google Patents
Internal line control system Download PDFInfo
- Publication number
- CA2327919C CA2327919C CA002327919A CA2327919A CA2327919C CA 2327919 C CA2327919 C CA 2327919C CA 002327919 A CA002327919 A CA 002327919A CA 2327919 A CA2327919 A CA 2327919A CA 2327919 C CA2327919 C CA 2327919C
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- CA
- Canada
- Prior art keywords
- internal line
- telephone
- address
- internet
- private branch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/42314—Systems providing special services or facilities to subscribers in private branch exchanges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
Abstract
In an internal line control system, a telephone adapted to communicate usi ng an Internet protocol (IP) and capable of being connected to the Internet via a communication means, includes means for storage of an IP address of a private branch exchange, and means for sending a switching request to the IP address of the private branc h exchange while specifying identification information. Concurrently, a private branch exchange having an Internet protocol (IP) and connected to the Internet via a communication means, includes means for storage of a correlation between the IP address of the telephone a nd an internal line number depending upon the identification information, and means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address. This allows a control to be switched over to an internal line telephone connected to the Internet so as to inheri t various types of settings of an internal line telephone directly accommodated in the private branch exchange.
Description
INTERNAL LINE CONTROL SYSTEM
Background of the Invention The present invention relates to an internal line control system in a private branch exchange. More particularly, the invention relates to an internal line control system in which a telephone connected to the Internet can be used as a substitute for an internal line accommodated in the private branch exchange.
Description of the Prior Art 1 o In a prior art private branch exchange system, audio communication is realized by an internal telephone accommodated at a physically predetermined position.
Further, when a telephone connected to the Internet or to a LAN is registered as an internal line of a private branch exchange, a unique internal line number is recorded and used as the internal line in the private branch exchange.
Accordingly, when the telephone is connected as the internal telephone to the Internet, it is necessary to record the unique internal line number as the internal line in the private branch exchange as described above. Hence, it is impossible to use the telephone as a substitute for an internal line of the private branch exchange which has been in use.
In the prior art system described above, there are problems in that, when the
Background of the Invention The present invention relates to an internal line control system in a private branch exchange. More particularly, the invention relates to an internal line control system in which a telephone connected to the Internet can be used as a substitute for an internal line accommodated in the private branch exchange.
Description of the Prior Art 1 o In a prior art private branch exchange system, audio communication is realized by an internal telephone accommodated at a physically predetermined position.
Further, when a telephone connected to the Internet or to a LAN is registered as an internal line of a private branch exchange, a unique internal line number is recorded and used as the internal line in the private branch exchange.
Accordingly, when the telephone is connected as the internal telephone to the Internet, it is necessary to record the unique internal line number as the internal line in the private branch exchange as described above. Hence, it is impossible to use the telephone as a substitute for an internal line of the private branch exchange which has been in use.
In the prior art system described above, there are problems in that, when the
2 o telephone is connected to the Internet as the internal telephone, it is impossible to use the telephone as a substitute for the internal line of the private branch exchange which has been in use, and inherit and employ each setting of services which have been set in the internal line of the private branch exchange.
Summary of the Invention In view of the foregoing problems, it is an object of the present invention to provide an internal line control system in which a control can be switched over to an internal telephone connected to the Internet so as to inherit various types of settings of an internal line telephone directly accommodated in a private branch exchange. The control can be
Summary of the Invention In view of the foregoing problems, it is an object of the present invention to provide an internal line control system in which a control can be switched over to an internal telephone connected to the Internet so as to inherit various types of settings of an internal line telephone directly accommodated in a private branch exchange. The control can be
3 o switched over from an internal line telephone in the user's own office and the internal line can be used as a substitutive internal line in any place so long as the telephone can be connected to the Internet.
According to the present invention, and in order to achieve the above-mentioned objects, there is provided an internal line control system in which an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means comprises means for storage of .an IP address of a private branch exchange, and means for sending a switching request to the IP address of the private branch exchange while specifying identification information of an internal line of which switching is requested, accommodated in the private branch exchange, and a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means including means for storage of a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information, and 1o means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address.
In accordance with a second aspect of the present invention, there is provided an internal line control system in which an internal line telephone corresponding to the internal line number includes posting means for posting a message indicating that a control is switched over to the Internet telephone, and the private branch Exchange being capable of posting the switching by the posting means of the internal line; telephone at a time of switching to the Internet telephone.
According to another aspect of the present invention, there is provided an 2 0 internal line control system in which a computer having the function of transmitting/receiving sound is used as a substitute for the Internet telephone.
According to another aspect of the present inventian, there is provided an internal line control system as described above, in which the private branch exchange includes means for receiving authentication information transmitted with the switching request from the Internet telephone and means for authenticating whether or not the switching request is acceptable depending upon the identification information.
According to another aspect of the present invention, there is provided an internal line control system in which an own IP address of the Internet telephone is stored in a server on the Internet instead of in the Internet telephone, and the Internet telephone obtains the own IP address from the server when presenting the switching request.
According to another aspect of the present invention, there is provided an internal line control system further including encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone, and decrypting means for decrypting the encrypted control signal and speech communication signal.
According to another aspect of the present invention, there is provided an internal line control system further including a plurality of private branch exchanges accommodating the internal line telephone, in which the Internet telephone includes means for specifying identification information of the internal telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange.
According to another aspect of the present invention, there is provided an internal line control system further including a plurality of private branch exchanges accommodating the internal line telephone, and the plurality of Internet telephones. In the internal line control system, the Internet telephones include means for specifying identification information of the internal line telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange.
According to another aspect of the present invention, there is provided an internal line control system further including a plurality of private branch exchanges accommodating the internal line telephone. In the internal line control system, IP addresses of the plurality of private branch exchanges are stored in a server on the Internet, and the Internet telephone obtains from the server the IP address of the private branch exchange 2 o when requesting switching.
According to another aspect of the present invention, there is provided an internal line control system in which the private branch exchange accepting the switching request from the Internet telephone includes means for posting, when the internal line telephone is in use, a message to this effect to the Internet telephone requesting the switching.
Brief Description of the Drawings Fig. 1 is a block diagram showing a system configuration according to a first embodiment of the present invention;
3 0 Fig. 2 is a diagram showing an illustrative structure of internal line identification information in the first embodiment of the present invention;
Fig. 3 is a diagram for explaining an illustrative structure of IP
address/internal line correspondence data;
According to the present invention, and in order to achieve the above-mentioned objects, there is provided an internal line control system in which an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means comprises means for storage of .an IP address of a private branch exchange, and means for sending a switching request to the IP address of the private branch exchange while specifying identification information of an internal line of which switching is requested, accommodated in the private branch exchange, and a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means including means for storage of a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information, and 1o means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address.
In accordance with a second aspect of the present invention, there is provided an internal line control system in which an internal line telephone corresponding to the internal line number includes posting means for posting a message indicating that a control is switched over to the Internet telephone, and the private branch Exchange being capable of posting the switching by the posting means of the internal line; telephone at a time of switching to the Internet telephone.
According to another aspect of the present invention, there is provided an 2 0 internal line control system in which a computer having the function of transmitting/receiving sound is used as a substitute for the Internet telephone.
According to another aspect of the present inventian, there is provided an internal line control system as described above, in which the private branch exchange includes means for receiving authentication information transmitted with the switching request from the Internet telephone and means for authenticating whether or not the switching request is acceptable depending upon the identification information.
According to another aspect of the present invention, there is provided an internal line control system in which an own IP address of the Internet telephone is stored in a server on the Internet instead of in the Internet telephone, and the Internet telephone obtains the own IP address from the server when presenting the switching request.
According to another aspect of the present invention, there is provided an internal line control system further including encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone, and decrypting means for decrypting the encrypted control signal and speech communication signal.
According to another aspect of the present invention, there is provided an internal line control system further including a plurality of private branch exchanges accommodating the internal line telephone, in which the Internet telephone includes means for specifying identification information of the internal telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange.
According to another aspect of the present invention, there is provided an internal line control system further including a plurality of private branch exchanges accommodating the internal line telephone, and the plurality of Internet telephones. In the internal line control system, the Internet telephones include means for specifying identification information of the internal line telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange.
According to another aspect of the present invention, there is provided an internal line control system further including a plurality of private branch exchanges accommodating the internal line telephone. In the internal line control system, IP addresses of the plurality of private branch exchanges are stored in a server on the Internet, and the Internet telephone obtains from the server the IP address of the private branch exchange 2 o when requesting switching.
According to another aspect of the present invention, there is provided an internal line control system in which the private branch exchange accepting the switching request from the Internet telephone includes means for posting, when the internal line telephone is in use, a message to this effect to the Internet telephone requesting the switching.
Brief Description of the Drawings Fig. 1 is a block diagram showing a system configuration according to a first embodiment of the present invention;
3 0 Fig. 2 is a diagram showing an illustrative structure of internal line identification information in the first embodiment of the present invention;
Fig. 3 is a diagram for explaining an illustrative structure of IP
address/internal line correspondence data;
4 Fig. 4 is a diagram showing an illustrative structure of current internal line service condition data in the first embodiment of the present invention;
Fig. 5 is a flowchart for explaining the operation of an internal line control system in the first embodiment of the present invention;
Fig. 6 is a block diagram showing a system configuration according to a second embodiment of the present invention;
Fig. 7 is a block diagram showing a system configuration according to a third embodiment of the present invention;
Fig. 8 is a block diagram showing a system configuration according to a fourth embodiment of the present invention;
Fig. 9 is a flowchart for explaining the operation of an internal line control system in the fourth embodiment of the present invention; and Fig. 10 is a block diagram showing a system configuration according to a fifth embodiment of the present invention.
Description of the Preferred Embodiments A detailed description will now be given of the present invention referring to the accompanying drawings.
2 o First Embodiment Fig. 1 is a block diagram showing a configuration of an internal line control system according to a first embodiment of the present invention.
Referring to Fig. 1, in the internal line control system according to the first embodiment, a private branch exchange 11 is connected through a LAN card 18 to a substitutive internal line telephone 14 and a server 50 over the Internet, and the private branch exchange 11 is connected to an internal line telephone 12 and a maintenance terminal 19.
The private branch exchange 11 is connected to an Internet 40 through the LAN card 18 and a hub 30, and the Internet 40 is connected to the substitutive internal line telephone 14 and the server 50.
In the embodiment, the private branch exchangE: 11 includes a signal converter 17, an internal line identification information authenticating apparatus 20, a subscriber data storage 21, and an internal line information storage 22.
Internal line identification information 23, shown in Fig. 2, is recorded in the subscriber data storage 21. As shown in Fig. 2, the internal line identification information 23 contains information for each of the internal line numbers (internal line 1, ..., internal line n), and is recorded as authentication information (such as ID or password) used for
Fig. 5 is a flowchart for explaining the operation of an internal line control system in the first embodiment of the present invention;
Fig. 6 is a block diagram showing a system configuration according to a second embodiment of the present invention;
Fig. 7 is a block diagram showing a system configuration according to a third embodiment of the present invention;
Fig. 8 is a block diagram showing a system configuration according to a fourth embodiment of the present invention;
Fig. 9 is a flowchart for explaining the operation of an internal line control system in the fourth embodiment of the present invention; and Fig. 10 is a block diagram showing a system configuration according to a fifth embodiment of the present invention.
Description of the Preferred Embodiments A detailed description will now be given of the present invention referring to the accompanying drawings.
2 o First Embodiment Fig. 1 is a block diagram showing a configuration of an internal line control system according to a first embodiment of the present invention.
Referring to Fig. 1, in the internal line control system according to the first embodiment, a private branch exchange 11 is connected through a LAN card 18 to a substitutive internal line telephone 14 and a server 50 over the Internet, and the private branch exchange 11 is connected to an internal line telephone 12 and a maintenance terminal 19.
The private branch exchange 11 is connected to an Internet 40 through the LAN card 18 and a hub 30, and the Internet 40 is connected to the substitutive internal line telephone 14 and the server 50.
In the embodiment, the private branch exchangE: 11 includes a signal converter 17, an internal line identification information authenticating apparatus 20, a subscriber data storage 21, and an internal line information storage 22.
Internal line identification information 23, shown in Fig. 2, is recorded in the subscriber data storage 21. As shown in Fig. 2, the internal line identification information 23 contains information for each of the internal line numbers (internal line 1, ..., internal line n), and is recorded as authentication information (such as ID or password) used for
5 authentication of a switching request from the substitutive internal line telephone 14.
Authentication using the internal line identification information 2;3 prevents unauthorized access. The internal line identification information 23 is recorded in the subscriber data storage 21 through the operation of the maintenance terminal 19.
When the internal fine identification information is sent with the internal line 1o switching request from the substitutive internal line telephone 14, the internal line identification information authenticating apparatus 20 authenticates whether or not the sent internal line identification information is recorded in the internal line identification information 23 in the subscriber data storage 21.
As shown in Fig. 4, in the internal line information storage 22 is recorded, for each of the internal line numbers, current internal line service condition data 25 showing whether or not the internal line telephone 12 is now in use or the substitutive internal line telephone 14 is in use as a substitute for the internal line telephone 12. The current internal line service condition data 25 is updated every time the internal line is switched over between the internal line telephone 12 and the substitutive internal line telephone 14. Further, in the 2 o internal line information storage 22 is recorded IP address/internal line correspondence data 24 as shown in Fig. 3. When the internal line is switched over to the substitutive internal line telephone 14 according to the switching request, in the IP address/intemal line correspondence data 24 is recorded an IP address of the substitutive internal line telephone 14 corresponding to the internal line number. Thereafter, when the internal line is switched back to the internal line telephone 12, the IP address/internal line correspondence data 24 is erased.
The substitutive internal line telephone 14 connected to the Internet 40 includes a switching key 15 and an IP address/internal line identification information storage 16.
The switching key 15 is used to transmit the internal line switching request when the substitutive internal line telephone 14 is used as a substitute for the internal line telephone 12. Though a separate key can be mounted as the switching key 15 to the substitutive internal line telephone 14, the function of the switching key 15 may be provided
Authentication using the internal line identification information 2;3 prevents unauthorized access. The internal line identification information 23 is recorded in the subscriber data storage 21 through the operation of the maintenance terminal 19.
When the internal fine identification information is sent with the internal line 1o switching request from the substitutive internal line telephone 14, the internal line identification information authenticating apparatus 20 authenticates whether or not the sent internal line identification information is recorded in the internal line identification information 23 in the subscriber data storage 21.
As shown in Fig. 4, in the internal line information storage 22 is recorded, for each of the internal line numbers, current internal line service condition data 25 showing whether or not the internal line telephone 12 is now in use or the substitutive internal line telephone 14 is in use as a substitute for the internal line telephone 12. The current internal line service condition data 25 is updated every time the internal line is switched over between the internal line telephone 12 and the substitutive internal line telephone 14. Further, in the 2 o internal line information storage 22 is recorded IP address/internal line correspondence data 24 as shown in Fig. 3. When the internal line is switched over to the substitutive internal line telephone 14 according to the switching request, in the IP address/intemal line correspondence data 24 is recorded an IP address of the substitutive internal line telephone 14 corresponding to the internal line number. Thereafter, when the internal line is switched back to the internal line telephone 12, the IP address/internal line correspondence data 24 is erased.
The substitutive internal line telephone 14 connected to the Internet 40 includes a switching key 15 and an IP address/internal line identification information storage 16.
The switching key 15 is used to transmit the internal line switching request when the substitutive internal line telephone 14 is used as a substitute for the internal line telephone 12. Though a separate key can be mounted as the switching key 15 to the substitutive internal line telephone 14, the function of the switching key 15 may be provided
6 by, for example, combining keys previously attached to the substitutive internal line telephone 14.
The server 50 includes an IP address storage portion 51, and an IP address of the substitutive internal line telephone 14 is stored in the IP address storage portion 51.
When presenting a switching request, the substitutive internal line telephone 14 reads an own IP address from the IP address storage portion 51 of the server 50 and transmits the IP
address.
In the IP address/internal line identification information storage 16 is stored data correlating the IP address with the internal line identification information.
1o In addition, the substitutive internal line telephone 14 includes unillustrated means for transmitting and receiving a control signal and a speech communication signal between the substitutive internal line telephone 14 and the private branch exchange 11 after the private branch exchange 11 accepts a connection request.
Further, the internal line telephone 12 includes a switching indicating lamp indicating that the internal line is switched over to the substitutive internal line telephone 14.
A description will naw be given of the operation of the internal line control system having the above configuration referring to the flowchart shown in Fig.
5.
In advance, by using the maintenance terminal 19 connected to the private branch exchange 11, the internal line identification information 23, as shown in Fig. 2, is 2 0 recorded in the subscriber data storage 21 in the private branch exchange 11 as authentication information for identification of the internal line.
After the substitutive internal line telephone 14 is connected to the Internet, the switching key 15 is pressed (Step 501) to transmit, to the IP address of the private branch exchange 11 stored in the IP addresslinternal line identification information storage 16, an internal line switching request containing both the own IP address obtained from the IP
address storage portion 51 of the server 50 and the internal line identification information stored in the IP address/internal line identification information storage 16 (Step 502).
In response to the internal line switching request from the substitutive internal line telephone 14, the internal line identification information authenticating apparatus 20 in 3 0 the private branch exchange 11 authenticates the received internal line identification information with reference to the internal line identification information 23 in the subscriber data storage 21 (Step 503).
When bath internal line identification information are identical and the request is authorized, the current internal line service condition data 25 in the internal line information
The server 50 includes an IP address storage portion 51, and an IP address of the substitutive internal line telephone 14 is stored in the IP address storage portion 51.
When presenting a switching request, the substitutive internal line telephone 14 reads an own IP address from the IP address storage portion 51 of the server 50 and transmits the IP
address.
In the IP address/internal line identification information storage 16 is stored data correlating the IP address with the internal line identification information.
1o In addition, the substitutive internal line telephone 14 includes unillustrated means for transmitting and receiving a control signal and a speech communication signal between the substitutive internal line telephone 14 and the private branch exchange 11 after the private branch exchange 11 accepts a connection request.
Further, the internal line telephone 12 includes a switching indicating lamp indicating that the internal line is switched over to the substitutive internal line telephone 14.
A description will naw be given of the operation of the internal line control system having the above configuration referring to the flowchart shown in Fig.
5.
In advance, by using the maintenance terminal 19 connected to the private branch exchange 11, the internal line identification information 23, as shown in Fig. 2, is 2 0 recorded in the subscriber data storage 21 in the private branch exchange 11 as authentication information for identification of the internal line.
After the substitutive internal line telephone 14 is connected to the Internet, the switching key 15 is pressed (Step 501) to transmit, to the IP address of the private branch exchange 11 stored in the IP addresslinternal line identification information storage 16, an internal line switching request containing both the own IP address obtained from the IP
address storage portion 51 of the server 50 and the internal line identification information stored in the IP address/internal line identification information storage 16 (Step 502).
In response to the internal line switching request from the substitutive internal line telephone 14, the internal line identification information authenticating apparatus 20 in 3 0 the private branch exchange 11 authenticates the received internal line identification information with reference to the internal line identification information 23 in the subscriber data storage 21 (Step 503).
When bath internal line identification information are identical and the request is authorized, the current internal line service condition data 25 in the internal line information
7 storage 22 is updated to show that the substitutive internal line telephone 14 is now in use (Step 504). Subsequently, in the IP address/interna! line correspondence data 24 of the internal line information storage 22 is stored an IP address corresponding to an internal line number identical with that of the received internal line identification information (Step 505).
Further, the private branch exchange 11 transmits to the substitutive internal line telephone 14 a signal showing that the internal line switching request is accepted (Step 506), and turns on the switching indicating lamp 13 of the internal line telephone 12 (Step 507), thereby posting a message indicating that the internal line is switched over from the internal line telephone 12 to the substitutive internal line telephone 14.
1o Thereafter, when a control is requested for the internal line number for which the switching request is accepted in the private branch exchange: 11, the private branch exchange 11 recognizes, with reference to the cun-ent internal line service condition data 25, that the substitutive internal line telephone 14 is now in use as a substitute for the internal line telephone 12. The private branch exchange 11 assembles the control signal and the speech communication signal into an IP packet in the signal converter 17, and sends the !P
packet to the substitutive internal line telephone 14 through the LAN card 18 and over the Internet 40.
The substitutive internal line telephone 14 is operated in response to the control signal from the private branch exchange 11 to transmit user's voice by using a sound 2 o signal.
Further, by pressing the switching key 15, the substitutive internal line telephone 14 sends an internal line switching-back request to the private branch exchange 11, and the private branch exchange 11 enables the internal line too be switched over from the substitutive internal line telephone 14 to the internal line telephone 12.
At the same time, the current internal line service condition data 25 is updated to show that the internal line telephone 12 is now in use, the IP address/internal line correspondence data 24 is erased, and the switching indicating lamp 13 of the internal line telephone 12 is turned off.
l'hereafter, the control signal and the speech communication signal are exchanged between the private branch exchange 11 and the internal line telephone 12.
3 p According to the first. embodiment, the internal line control system is operated as set forth above. Thus, the telephone substitutive internal line telephone 14 can be used as a substitute for the internal line telephone 12 in the user's own office in any place so long as the telephone can be connected to the Internet.
Further, the private branch exchange 11 transmits to the substitutive internal line telephone 14 a signal showing that the internal line switching request is accepted (Step 506), and turns on the switching indicating lamp 13 of the internal line telephone 12 (Step 507), thereby posting a message indicating that the internal line is switched over from the internal line telephone 12 to the substitutive internal line telephone 14.
1o Thereafter, when a control is requested for the internal line number for which the switching request is accepted in the private branch exchange: 11, the private branch exchange 11 recognizes, with reference to the cun-ent internal line service condition data 25, that the substitutive internal line telephone 14 is now in use as a substitute for the internal line telephone 12. The private branch exchange 11 assembles the control signal and the speech communication signal into an IP packet in the signal converter 17, and sends the !P
packet to the substitutive internal line telephone 14 through the LAN card 18 and over the Internet 40.
The substitutive internal line telephone 14 is operated in response to the control signal from the private branch exchange 11 to transmit user's voice by using a sound 2 o signal.
Further, by pressing the switching key 15, the substitutive internal line telephone 14 sends an internal line switching-back request to the private branch exchange 11, and the private branch exchange 11 enables the internal line too be switched over from the substitutive internal line telephone 14 to the internal line telephone 12.
At the same time, the current internal line service condition data 25 is updated to show that the internal line telephone 12 is now in use, the IP address/internal line correspondence data 24 is erased, and the switching indicating lamp 13 of the internal line telephone 12 is turned off.
l'hereafter, the control signal and the speech communication signal are exchanged between the private branch exchange 11 and the internal line telephone 12.
3 p According to the first. embodiment, the internal line control system is operated as set forth above. Thus, the telephone substitutive internal line telephone 14 can be used as a substitute for the internal line telephone 12 in the user's own office in any place so long as the telephone can be connected to the Internet.
8 Alternatively, in the above embodiment, the private branch exchange 11 may be provided with means for posting, if the internal line telephone 12 is in use when presenting the switching request by pressing the switching key 15 of the substitutive internal line telephone 14, an in-use message to the substitutive internal line telephone 14. Concurrently, the substitutive internal line telephone 14 may be provided with means for indicating the in-use message by, for example, turning on the lamp, or outputting the message depending upon the posting from the private branch exchange 11.
Second Embodiment A description will now be given of an internal line control system according to a second embodiment of the present invention. Fig. 6 is a block diagram showing a configuration of the internal line control system according to the second embodiment of the present invention.
Referring to Fig. 6, in the internal line control system according to the second embodiment, encryption/decryption circuits 61, fit are mounted to encrypt and decrypt a control signal and a speech communication signal exchanged between a private branch exchange 11 and a substitutive internal line telephone 14. The same; reference numerals are used for component parts identical with those in the first embodiment of Fig.
1, and descriptions thereof are omitted.
In the second embodiment, the control signal and the sound signal are transmitted between the private branch exchange 11 and the substitutive internal line telephone 14 through encryption by the encryption/decryption circuits 61, 62 thereby preventing the control signal and the sound signal from leaking out over the Internet 40. In the encryption/decryption circuits 61 and 62, it is possible to employ tine of the cryptosystems (such as symmetrical key cryptosystem, and asymmetrical key cryptosystem) known in the prior art.
Third Embodiment A description will now be given of an internal line control system according to a third embodiment of the present invention. Fig. 7 is a block diagram showing a configuration of the internal line control system according to the third embodiment of the present invention.
Referring to Fig. 7, in the internal line control system according to the third embodiment, a computer 70, as well as a substitutive internal line telephone 14, can be used
Second Embodiment A description will now be given of an internal line control system according to a second embodiment of the present invention. Fig. 6 is a block diagram showing a configuration of the internal line control system according to the second embodiment of the present invention.
Referring to Fig. 6, in the internal line control system according to the second embodiment, encryption/decryption circuits 61, fit are mounted to encrypt and decrypt a control signal and a speech communication signal exchanged between a private branch exchange 11 and a substitutive internal line telephone 14. The same; reference numerals are used for component parts identical with those in the first embodiment of Fig.
1, and descriptions thereof are omitted.
In the second embodiment, the control signal and the sound signal are transmitted between the private branch exchange 11 and the substitutive internal line telephone 14 through encryption by the encryption/decryption circuits 61, 62 thereby preventing the control signal and the sound signal from leaking out over the Internet 40. In the encryption/decryption circuits 61 and 62, it is possible to employ tine of the cryptosystems (such as symmetrical key cryptosystem, and asymmetrical key cryptosystem) known in the prior art.
Third Embodiment A description will now be given of an internal line control system according to a third embodiment of the present invention. Fig. 7 is a block diagram showing a configuration of the internal line control system according to the third embodiment of the present invention.
Referring to Fig. 7, in the internal line control system according to the third embodiment, a computer 70, as well as a substitutive internal line telephone 14, can be used
9 instead of an internal line telephone 12. The same reference numerals are used for component parts identical with those in the first embodiment of Fig. 1, and descriptions thereof are omitted.
The computer 70, which may comprise a personal camputer (PC) or a mobile PC, is connected to the Internet 40, and can be used for speech communication as a substitute for the internal line 12. Hence, as in the substitutive internal line telephone 14, the computer 70 is provided with a switching key 15, an IP address/internal line identification information storage 16, and a speaker 73 and a microphone 74 for exchange of sound (speech communication).
in the third embodiment, as in the above-mentioned first embodiment, speech communication can be realized by switching over from the internal line telephone 12 to the computer 70. The operation is identical with that in the first embodiment shown in Fig. 5.
Fourth Embodiment A description will now be given of an internal line control system according to a fourth embodiment of the present invention. Fig. 8 is a block diagram showing a configuration of the internal line control system according to the fourth embodiment of the present invention.
Referring to Fig. 8, in the internal line control system according to the fourth 2 0 embodiment, a plurality of private branch exchanges 11 a, 11 b, ..., 11 n are interconnected through a hub 30. As shown in Fig. 8, the private branch exchanges 11 a, 11 b, ..., 11 n are connected to the Internet 40 through LAN cards 18a to 18n, and respectively accommodate internal lines 12a to 12n. Each private branch exchange includes a signal converter 17, an internal line identification information authenticating apparatus 20, a subscriber data storage 21, and an internal line information storage 22.
Further, instead of the IP address/internal line identification information storage 16 mounted in the substitutive internal line telephone 14 in the first embodiment, a server 50a includes an IP address/intemal line identification information storage 16a. In the IP
address/intemal line identification information storage 16a are stored IP
address and internal 3 0 line identification information for each of the private branch exchanges 11 a, 11 b, ..., 11 n.
The same reference numerals are used for component parts identical with those in the first embodiment of Fig. 1, and descriptions thereof are omitted.
In the fourth embodiment, when switching of the internal line is requested from the substitutive internal line telephone 14, the substitutive internal line telephone 14 obtains 1 () from the IP address/internal line identification information storage 16a of the server 50a the IP address and the internal line identification information of one of the private branch exchanges 11 a,11 b, ...,11 n, upon which the internal line switching request should be made, and transmits the results to the appropriate private branch exchange.
Further, the substitutive internal line telephone 14 includes a switching key 15a for selective switching of the internal line telephones 12a to 12n accommodated in the plurality of private branch exchanges 11 a" 11 b, ..., 11 n.
A description will now be given of the operation of the internal line control system according to the fourth embodiment with reference to the flowchart of Fig. 9..
In advance, by using maintenance terminals 19a, 19b, ..., 19n connected to the private branch exchanges 11 a, 11 b, ..., 11 n, internal line identification information 23 as shown in Fig. 2 is recorded, as authentication information for identification of the internal line, in the subscriber data storage 21 in each of private branch exchanges 11 a, 11 b, ...,11 n.
After the substitutive internal line telephone 14 is connected to the Internet, the switching key 15a is pressed corresponding to any one of the internal line telephones 12a to 12n, to which the control should be switched over (Step 501). Subsequently, the substitutive internal line telephone 14 obtains from the IP address/internal line identification information storage 16a of the server 50 the IP address of one of the private branch exchanges 11 a, 11 b, ..., 11 n accommodating one of the internal line telephones 12a to 12n, 2 0 to which the control should be switched over (Step 901 ), and transmits to the obtained IP
address of one of the private branch exchanges 11 a, 11 b, ..., 11 n son internal line switching request containing an own IP address obtained from an IP address storage portion 51 of the server 50a and internal line identification information stored in the IP
address/intemal line identification information storage 16a of the server 50a (Step 502).
In later steps, the same operation is carried out as in the discussion with reference to Fig. 5.
Fifth Embodiment A description will now be given of an internal line control system according to 3 o a fifth embodiment of the present invention. Fig. 10 is a block diagram showing a configuration of the internal line control system according to the fifth embodiment of the present invention.
Referring to Fig. 10, in the internal line control system according to the fifth embodiment, a plurality of private branch exchanges 11 a, 11 b, ..., 11 n are interconnected through a hub 30, and a plurality of substitutive internal line telephones 14a, 14b, ..., 14n are interconnected over an Internet 40. As shown in Fig. 10, the private branch exchanges 11 a, 11 b, ..., 11 n are connected to the Internet 40 through LAN cards 18a to 1 »n, and respectively accommodate internal line telephones 12a to 12n. Each private branch exchange includes a signal converter 17, an internal line identification information authenticating apparatus 20, a subscriber data storage 21, and an internal line information storage 22.
Further, instead of the IP address/intemal line identification information storage 16 mounted in the substitutive internal line telephone 14 in the first embodiment, a server 50a includes an IP address/internal line identification information storage 16a.
In the IP
1o address/internal line identification information storage 16a are stored an IP address and internal line identification information for each of the private branch exchanges 11 a, 11 b, ..., 11 n. The same reference numerals are used for component parts identical with those in the first embodiment of Fig. 1, and descriptions thereof are ornitted.
In the fifth embodiment, when switching of an internal line is requested from any one of the substitutive internal line telephones 14a to 14n, the substitutive internal line telephone obtains from the IP addresslinternal line identification information storage 16a of the server 50a the IP address and the internal line identification information of one of the private branch exchanges 11 a, 11 b, ..., 11 n, of which switching is requested, and transmits the results to the appropriate private branch exchange.
2 0 Further, the substitutive internal line telephones '14a to 14n include the switching keys 15a to 15n for selective switching of the internal line telephones 12a to 12n accommodated in the plurality of private branch exchanges 11 a, 11 b, ..., 11 n.
In the fifth embodiment, the operation of the internal line control system is identical with that in the fourth embodiment. However, in the fifth embodiment, since the switching may be requested from the plurality of substitutive internal lines 14a to 14n, the private branch exchange 11 may be provided with means for posting to the substitutive internal line telephone 14 a message indicating that the internal line telephone of which switching is requested is in use, or one internal line telephone is used as a substitute for another substitutive internal line telephone. Concurrently, the :>ubstitutive internal line 3 o telephone 14 may be provided with means for indicating the situation depending upon the posting from the private branch exchange 11 by, for example, turning on a lamp, or outputting the message.
As set forth above, according to the present invention, it is possible to provide an effect such that the control c;an be switched over by the internal line telephone accommodated in the private branch exchange to use the telephone connected over the Internet, and the telephone can be used as a substitute for the internal line in the user's own office in any place so long as the telephone can be connected to the Internet.
In addition, by mounting an encrypting means for encrypting the control signal and the speech communication signal exchanged between the private branch exchange and the telephone, and a decrypting means for decrypting the encrypted control signal and speech communication signal, it is possible to prevent the control signal and the sound signal from leaking out over the Internet.
While preferred embodiments of the invention have been described using 1 o specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims.
The computer 70, which may comprise a personal camputer (PC) or a mobile PC, is connected to the Internet 40, and can be used for speech communication as a substitute for the internal line 12. Hence, as in the substitutive internal line telephone 14, the computer 70 is provided with a switching key 15, an IP address/internal line identification information storage 16, and a speaker 73 and a microphone 74 for exchange of sound (speech communication).
in the third embodiment, as in the above-mentioned first embodiment, speech communication can be realized by switching over from the internal line telephone 12 to the computer 70. The operation is identical with that in the first embodiment shown in Fig. 5.
Fourth Embodiment A description will now be given of an internal line control system according to a fourth embodiment of the present invention. Fig. 8 is a block diagram showing a configuration of the internal line control system according to the fourth embodiment of the present invention.
Referring to Fig. 8, in the internal line control system according to the fourth 2 0 embodiment, a plurality of private branch exchanges 11 a, 11 b, ..., 11 n are interconnected through a hub 30. As shown in Fig. 8, the private branch exchanges 11 a, 11 b, ..., 11 n are connected to the Internet 40 through LAN cards 18a to 18n, and respectively accommodate internal lines 12a to 12n. Each private branch exchange includes a signal converter 17, an internal line identification information authenticating apparatus 20, a subscriber data storage 21, and an internal line information storage 22.
Further, instead of the IP address/internal line identification information storage 16 mounted in the substitutive internal line telephone 14 in the first embodiment, a server 50a includes an IP address/intemal line identification information storage 16a. In the IP
address/intemal line identification information storage 16a are stored IP
address and internal 3 0 line identification information for each of the private branch exchanges 11 a, 11 b, ..., 11 n.
The same reference numerals are used for component parts identical with those in the first embodiment of Fig. 1, and descriptions thereof are omitted.
In the fourth embodiment, when switching of the internal line is requested from the substitutive internal line telephone 14, the substitutive internal line telephone 14 obtains 1 () from the IP address/internal line identification information storage 16a of the server 50a the IP address and the internal line identification information of one of the private branch exchanges 11 a,11 b, ...,11 n, upon which the internal line switching request should be made, and transmits the results to the appropriate private branch exchange.
Further, the substitutive internal line telephone 14 includes a switching key 15a for selective switching of the internal line telephones 12a to 12n accommodated in the plurality of private branch exchanges 11 a" 11 b, ..., 11 n.
A description will now be given of the operation of the internal line control system according to the fourth embodiment with reference to the flowchart of Fig. 9..
In advance, by using maintenance terminals 19a, 19b, ..., 19n connected to the private branch exchanges 11 a, 11 b, ..., 11 n, internal line identification information 23 as shown in Fig. 2 is recorded, as authentication information for identification of the internal line, in the subscriber data storage 21 in each of private branch exchanges 11 a, 11 b, ...,11 n.
After the substitutive internal line telephone 14 is connected to the Internet, the switching key 15a is pressed corresponding to any one of the internal line telephones 12a to 12n, to which the control should be switched over (Step 501). Subsequently, the substitutive internal line telephone 14 obtains from the IP address/internal line identification information storage 16a of the server 50 the IP address of one of the private branch exchanges 11 a, 11 b, ..., 11 n accommodating one of the internal line telephones 12a to 12n, 2 0 to which the control should be switched over (Step 901 ), and transmits to the obtained IP
address of one of the private branch exchanges 11 a, 11 b, ..., 11 n son internal line switching request containing an own IP address obtained from an IP address storage portion 51 of the server 50a and internal line identification information stored in the IP
address/intemal line identification information storage 16a of the server 50a (Step 502).
In later steps, the same operation is carried out as in the discussion with reference to Fig. 5.
Fifth Embodiment A description will now be given of an internal line control system according to 3 o a fifth embodiment of the present invention. Fig. 10 is a block diagram showing a configuration of the internal line control system according to the fifth embodiment of the present invention.
Referring to Fig. 10, in the internal line control system according to the fifth embodiment, a plurality of private branch exchanges 11 a, 11 b, ..., 11 n are interconnected through a hub 30, and a plurality of substitutive internal line telephones 14a, 14b, ..., 14n are interconnected over an Internet 40. As shown in Fig. 10, the private branch exchanges 11 a, 11 b, ..., 11 n are connected to the Internet 40 through LAN cards 18a to 1 »n, and respectively accommodate internal line telephones 12a to 12n. Each private branch exchange includes a signal converter 17, an internal line identification information authenticating apparatus 20, a subscriber data storage 21, and an internal line information storage 22.
Further, instead of the IP address/intemal line identification information storage 16 mounted in the substitutive internal line telephone 14 in the first embodiment, a server 50a includes an IP address/internal line identification information storage 16a.
In the IP
1o address/internal line identification information storage 16a are stored an IP address and internal line identification information for each of the private branch exchanges 11 a, 11 b, ..., 11 n. The same reference numerals are used for component parts identical with those in the first embodiment of Fig. 1, and descriptions thereof are ornitted.
In the fifth embodiment, when switching of an internal line is requested from any one of the substitutive internal line telephones 14a to 14n, the substitutive internal line telephone obtains from the IP addresslinternal line identification information storage 16a of the server 50a the IP address and the internal line identification information of one of the private branch exchanges 11 a, 11 b, ..., 11 n, of which switching is requested, and transmits the results to the appropriate private branch exchange.
2 0 Further, the substitutive internal line telephones '14a to 14n include the switching keys 15a to 15n for selective switching of the internal line telephones 12a to 12n accommodated in the plurality of private branch exchanges 11 a, 11 b, ..., 11 n.
In the fifth embodiment, the operation of the internal line control system is identical with that in the fourth embodiment. However, in the fifth embodiment, since the switching may be requested from the plurality of substitutive internal lines 14a to 14n, the private branch exchange 11 may be provided with means for posting to the substitutive internal line telephone 14 a message indicating that the internal line telephone of which switching is requested is in use, or one internal line telephone is used as a substitute for another substitutive internal line telephone. Concurrently, the :>ubstitutive internal line 3 o telephone 14 may be provided with means for indicating the situation depending upon the posting from the private branch exchange 11 by, for example, turning on a lamp, or outputting the message.
As set forth above, according to the present invention, it is possible to provide an effect such that the control c;an be switched over by the internal line telephone accommodated in the private branch exchange to use the telephone connected over the Internet, and the telephone can be used as a substitute for the internal line in the user's own office in any place so long as the telephone can be connected to the Internet.
In addition, by mounting an encrypting means for encrypting the control signal and the speech communication signal exchanged between the private branch exchange and the telephone, and a decrypting means for decrypting the encrypted control signal and speech communication signal, it is possible to prevent the control signal and the sound signal from leaking out over the Internet.
While preferred embodiments of the invention have been described using 1 o specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims.
Claims (14)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS::
1. An internal tine control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address.
2. An internal line control system, comprising:
a telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for staring an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal fine telephone of the internal line number to an address specified by the IP
address; and an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone.
a telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for staring an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal fine telephone of the internal line number to an address specified by the IP
address; and an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone.
3. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address; and the private branch exchange further including a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address; and the private branch exchange further including a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information.
4. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
5. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
and further comprising:
a plurality of private branch exchanges accommodating the internal line telephone or the Internet telephone or both thereof wherein the Internet telephone includes means for specifying identification information of the internal line telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
and further comprising:
a plurality of private branch exchanges accommodating the internal line telephone or the Internet telephone or both thereof wherein the Internet telephone includes means for specifying identification information of the internal line telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange.
6. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the 1P
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
and a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the 1P
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
and a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information.
7. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
8. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, the Internet telephone comprising:
a first storage means for storing an IP address of a private branch exchange;
and a sending means for sending a switching request to the IP address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange, and a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
and the private branch exchange further including a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, the Internet telephone comprising:
a first storage means for storing an IP address of a private branch exchange;
and a sending means for sending a switching request to the IP address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange, and a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
and the private branch exchange further including a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information.
9. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising:
a second storage means for storing a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising:
a second storage means for storing a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
a receiving means for receiving authentication information transmitted with the switching request from the Internet telephone and authenticating whether or not the switching request is acceptable depending upon the identification information;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
10. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone;
a decrypting means for decrypting the encrypted control signal and speech communication signal;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP address of the Internet telephone and an internal line number depending upon the identification information; and a transmitting means for transmitting, depending upon the correlation between the IP address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP address;
an internal line telephone corresponding to the internal line number including posting means for posting a message indicating that a control is switched over to the Internet telephone, the private branch exchange being capable of posting the switching by the posting means of the internal line telephone at a time of switching to the Internet telephone;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone;
a decrypting means for decrypting the encrypted control signal and speech communication signal;
an encrypting means for encrypting a control signal and a speech communication signal exchanged between the private branch exchange and the Internet telephone; and a decrypting means for decrypting the encrypted control signal and speech communication signal.
11. An internal line control system, comprising:
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone, comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address; and a plurality of private branch exchanges accommodating the internal line telephone or a plurality of Internet telephones or both thereof, wherein each of the Internet telephones includes means for specifying identification information of the internal line telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange; and the plurality of private branch exchanges accommodating the internal line telephone, wherein IP addresses of the plurality of private branch exchanges are stored in a server on the Internet, and the Internet telephone or the internal line telephone or both thereof obtain(s) from the server the IP address of the private branch exchange when requesting switching.
an Internet telephone adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a first communication means, said Internet telephone, comprising a first storage means for storing an IP address of a private branch exchange; and a sending means for sending a switching request to the IP
address of the private branch exchange while specifying identification information of an internal line telephone, of which switching is requested, accommodated in the private branch exchange;
a private branch exchange adapted to communicate using an Internet protocol (IP) and capable of being connected to the Internet via a second communication means, and comprising a second storage means for storing a correlation between the IP
address of the Internet telephone and an internal line number depending upon the identification information;
and a transmitting means for transmitting, depending upon the correlation between the IP
address and the internal line number, a control signal and a speech communication signal for an internal line telephone of the internal line number to an address specified by the IP
address; and a plurality of private branch exchanges accommodating the internal line telephone or a plurality of Internet telephones or both thereof, wherein each of the Internet telephones includes means for specifying identification information of the internal line telephone accommodated in the plurality of private branch exchanges, and means for requesting switching of the appropriate private branch exchange; and the plurality of private branch exchanges accommodating the internal line telephone, wherein IP addresses of the plurality of private branch exchanges are stored in a server on the Internet, and the Internet telephone or the internal line telephone or both thereof obtain(s) from the server the IP address of the private branch exchange when requesting switching.
12. The internal line control system according to any one of claims 1 to 11, wherein the Internet telephone comprises a computer having the function of transmitting/receiving sound.
13. The internal line control system according to any one of claims 1 to 11, wherein the private branch exchange accepting the switching request from the Internet telephone includes means for posting, when the internal line telephone is in use, a message to this effect to the Internet telephone requesting the switching.
14. The internal line control system according to any one of claims 1 to 11, wherein an own IP address of the Internet telephone is stored in a server on the Internet instead of in the Internet telephone, and the Internet telephone obtains the own IP address from the server when presenting the switching request.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35009299A JP3446203B2 (en) | 1999-12-09 | 1999-12-09 | Extension control system |
| JP11-350092 | 1999-12-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2327919A1 CA2327919A1 (en) | 2001-06-09 |
| CA2327919C true CA2327919C (en) | 2004-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002327919A Expired - Lifetime CA2327919C (en) | 1999-12-09 | 2000-12-08 | Internal line control system |
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| US (1) | US6931000B2 (en) |
| JP (1) | JP3446203B2 (en) |
| AU (1) | AU772998B2 (en) |
| CA (1) | CA2327919C (en) |
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| KR100876760B1 (en) * | 2001-10-13 | 2009-01-07 | 삼성전자주식회사 | Method for converting call processing in internet protocol telephony exchange system |
| GB0200027D0 (en) * | 2002-01-02 | 2002-02-13 | Bae Systems Plc | Improvements relating to operation of a current controller |
| JP2003259405A (en) | 2002-02-28 | 2003-09-12 | Nec Infrontia Corp | Telephone system |
| JP3914861B2 (en) * | 2002-11-29 | 2007-05-16 | Ｎｅｃインフロンティア株式会社 | Communications system |
| JP2004235922A (en) * | 2003-01-30 | 2004-08-19 | Nec Engineering Ltd | Method and system for extension service by ip telephone set |
| JP3826107B2 (en) * | 2003-04-01 | 2006-09-27 | キヤノン株式会社 | Image communication apparatus, control method therefor, program, and storage medium |
| KR100587945B1 (en) | 2004-10-08 | 2006-06-09 | (주)제너시스템즈 | Method And System For Providing Call Transfer Service |
| CN100574334C (en) * | 2005-09-09 | 2009-12-23 | 华为技术有限公司 | PPP accesses terminal and realizes the method that automatic service is provided |
| JP2007123971A (en) * | 2005-10-25 | 2007-05-17 | Hitachi Ltd | Call setting method of key telephone system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5675733A (en) | 1992-11-30 | 1997-10-07 | International Business Machines Corporation | Statistical analysis and display of reception status of electronic messages |
| US5629687A (en) | 1994-08-29 | 1997-05-13 | Emergency Technologies, Inc. | Universal interface for remotely-monitored security systems |
| WO1997033412A1 (en) * | 1996-03-06 | 1997-09-12 | Bear Creek Technologies, Inc. | System for interconnecting standard telephony communications equipment to internet protocol networks |
| US5892764A (en) | 1996-09-16 | 1999-04-06 | Sphere Communications Inc. | ATM LAN telephone system |
| AU6666898A (en) * | 1997-02-02 | 1998-09-09 | Fonefriend Systems, Inc. | Internet switch box, system and method for internet telephony |
| US5999609A (en) | 1997-04-04 | 1999-12-07 | Sun Microsystems, Inc. | Computer-telephony (CT) system including an electronic call request |
| US6118864A (en) * | 1997-12-31 | 2000-09-12 | Carmel Connection, Inc. | System and method for providing communication on a wide area network |
| US6674745B1 (en) * | 1998-12-31 | 2004-01-06 | 3Com Corporation | Method and system for mapping phone numbers to IP addresses |
| ATE324006T1 (en) * | 1999-01-08 | 2006-05-15 | Netnumber Com Inc | METHOD AND APPARATUS FOR CORRELING A UNIQUE IDENTIFIER, SUCH AS A PSTN TELEPHONE NUMBER, TO AN INTERNET ADDRESS FOR COMMUNICATION OVER THE INTERNET |
| US6721790B1 (en) * | 2000-03-09 | 2004-04-13 | Avinta Communications, Inc | User settable unified workstation identification system |
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- 1999-12-09 JP JP35009299A patent/JP3446203B2/en not_active Expired - Lifetime
-
2000
- 2000-12-08 AU AU72116/00A patent/AU772998B2/en not_active Expired
- 2000-12-08 US US09/731,698 patent/US6931000B2/en not_active Expired - Lifetime
- 2000-12-08 CA CA002327919A patent/CA2327919C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2327919A1 (en) | 2001-06-09 |
| JP3446203B2 (en) | 2003-09-16 |
| AU7211600A (en) | 2001-06-14 |
| AU772998B2 (en) | 2004-05-13 |
| US20010015969A1 (en) | 2001-08-23 |
| US6931000B2 (en) | 2005-08-16 |
| JP2001169321A (en) | 2001-06-22 |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20201208 |