Digital telephone communication system including an exchange and

Details Digital telephone communication system including an exchange and Digital telephone communication system including an exchange and

1994-10-17

1995-11-21

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04J 312

Patent

active

054694418

ABSTRACT:
A digital telephone communication system, for example ISDN or ESPABX, having an exchange and a plurality of user stations, the exchange communicating with each user station by at least a signalling (D) channel and a communication (B) channel of greater bandwidth. A service station is connected to the exchange in which is stored programming information for the user stations. Each user station includes a processor in which the telephone directory number of the service station is stored. Programming information available at the service station can be obtained by the processor of a user station by calling the service station, and is transmitted from the service station over the B channel. The service station may also provide unrequested programming information to any or all of the user stations over the B channels.

REFERENCES:
patent: 4734931 (1988-03-01), Bourg et al.
patent: 4839919 (1989-06-01), Borges
patent: 4922490 (1990-05-01), Blakley
patent: 5025470 (1991-06-01), Thornborough et al.
patent: 5043983 (1991-08-01), Dorst et al.
patent: 5050005 (1991-09-01), Kagami
patent: 5051992 (1991-09-01), Tamiguchi et al.
patent: 5073890 (1991-12-01), Danielsen
Helgert, "Integrated Services Digital Network", 1991, p. 49.

Affiliated with

Also associated with

Rating

Digital telephone communication system including an exchange and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital telephone communication system including an exchange and, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital telephone communication system including an exchange and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1143632