Telephone network with normally off hook telephones

Details Telephone network with normally off hook telephones Telephone network with normally off hook telephones

1996-01-30

1999-06-15

Tsang, Fan S.

Telephonic communications

Audio message storage, retrieval, or synthesis

Call source identification

379 76, 379 8803, 379171, H04M 164

Patent

active

059129506

ABSTRACT:
An improved telephone switching arrangement in which all of the telephones (i.e.; audio terminals) are in a normally off hook state. The user desiring to place a call need not take the telephone off hook or change the electrical state of the connection between the telephone switching equipment and the audio terminal. In a preferred embodiment, the called party's telephone number to be dialed is transmitted from a personal computer to the telephone switching equipment.

REFERENCES:
patent: 4203011 (1980-05-01), Coviello
patent: 4953159 (1990-08-01), Hayden et al.
patent: 5452289 (1995-09-01), Sharma et al.
patent: 5594784 (1997-01-01), Velius
patent: 5675632 (1997-10-01), Odaka et al.

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