A facsimile apparatus has a plurality of portable units, and enables a subscriber to make a call reservation and conduct a telephone conversation on the reserved call, using the portable units. A base unit of the facsimile apparatus sets up a call reservation in response to a call reservation request...http://www.google.ca/patents/US6272357?utm_source=gb-gplus-sharePatent US6272357 - Method for making call reservation using portable unit in facsimile apparatus
