ISDN CALLING EQUIPMENT COMMUNICATES
REQUIRED BANDWIDTH TO CALLED ISDN
EQUIPMENT VIA D CHANNEL HDCC MESSAGES
RCS MONITORS D CHANNEL HDCC MESSAGES
RCS DETERMINES THE NUMBER OF B BEARER
CHANNELS REQUIRED TO SUPPORT COMMUNICATION
RCS INITIATES ESTABLISHMENT OF REQUIRED
NUMBER OF B BEARER CHANNELS
RCS CONTINUES TO MONITOR D CHANNEL HDCC
MESSAGES DURING THE ISDN CALL
RCS INITIATES ESTABLISHMENT OR TEARING DOWN
OF B CHANNELS AS APPROPRIATE
