Abstract: A circuit arrangement is provided for connecting a personal computer (PC) to a port of a key telephone system via an adapter circuit which also interfaces a digital key set to the port. The adapter circuit is connected to the computer via an RS-232 single channel data link. The PC is programmed to generate and receive a serial data stream into which are encapsulated messages relating to link control and telephone functionality. The adapter circuit is also programmed to receive and generate the serial data stream. The data rate through the adapter circuit and the telephone system and hence to a remote computer is dependent on the utilization of the attached key set by the user to make a call.
Type:
Grant
Filed:
May 23, 1997
Date of Patent:
November 23, 1999
Assignee:
Nortel Networks Corporation
Inventors:
Chris Buchanan, Dick Keilty, Ron Wellard, Chi-Yin Wong, Tim Jenkins, Timothy Winston Hibberd