Telephone control system

Details Telephone control system Telephone control system

2003-08-28

2010-06-29

Deane, William J (Department: 2614)

Telephonic communications

Special services

Service trigger

C379S156000, C379S171000

Reexamination Certificate

active

07746995

ABSTRACT:
An example master telephone set constituting a telephone control system includes a status setting unit, a status discrimination unit, an incoming-call detection unit, a notification unit, and a master-set control unit for controlling the operations of the respective units. When, in a state in which the incoming-call detection unit has detected a new incoming call signal from any other line, the status discrimination unit discriminates that one line is in a call holding status, the master-set control unit controls the notification unit so that the pertinent incoming call is notified by, at least, tone information. On the other hand, when the status discrimination unit discriminates, in the same state, that one line is in an on-call status, the master-set control unit controls the notification unit so that the pertinent incoming call is notified by, at least, visible information.

REFERENCES:
patent: 5602910 (1997-02-01), Tsutsui et al.
patent: 5841851 (1998-11-01), Recht et al.
patent: 6625474 (2003-09-01), Bussan et al.
patent: 4-172743 (1992-06-01), None
patent: 5-344054 (1993-12-01), None
patent: 2001-292463 (2001-10-01), None

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