Microprocessor controlled telephone unit

Details Microprocessor controlled telephone unit Microprocessor controlled telephone unit

1983-10-07

1987-06-30

Brown, Thomas W.

Telephonic communications

Multi-line or key substation system with selective switching...

With intercom system

379164, 379211, 379389, H04M 160, H04M 354

Patent

active

046776613

ABSTRACT:
A telephone unit having a plurality of lines which connect to a PBX and having a microprocessor which transmits and receives data over a digital line between telephone units associated in a group such that a direct forwarding feature is controlled by the microprocessor altering the ring arrangement among the telephones in the group. The telephone unit also has a speakerphone which is controlled by the microprocessor. Each telephone unit has means for monitoring the status of the lines associated with it and providing data to the microprocessor as to line status.

REFERENCES:
patent: 4292474 (1981-09-01), Morrell et al.
patent: 4293740 (1981-10-01), Gibb et al.
patent: 4327256 (1982-04-01), Crooks et al.
patent: 4465902 (1984-08-01), Zato
patent: 4511766 (1985-04-01), Shah
patent: 4555596 (1985-11-01), Blomley
"Intelligent Telephone Sets", H. Strobel, Telecommunications, Dec. 1980, pp. 59-61.
"Ein Telefon mit Komfort", E. Wilke et al., Funkschau (Germany), No. 2, 1982, pp. 45-47.

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