Telephonic communications – Special services – Call waiting
Patent
1996-08-16
1998-11-24
Matar, Ahmad F.
Telephonic communications
Special services
Call waiting
379 9335, 379142, 379351, 379421, H04M 100, H04M 342
Patent
active
058418539
ABSTRACT:
A telephone apparatus can receive information about a third party sent from a telephone exchange with a call waiting service when a call is issued from the third party during a conversation using the telephone apparatus. Upon issuance of the call from the third party during the conversation over the telephone apparatus, the exchange sends out an alert signal, in response to which the telephone apparatus sends back an acknowledge signal. The telephone apparatus also mutes a speech transmitter circuit in order to protect calling party information such as a telephone number sent from the exchange in succession from being destroyed by a speech signal. The calling party information sent from the exchange can be received without fail and can subsequently be displayed.
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patent: 4947421 (1990-08-01), Toy et al.
patent: 5263084 (1993-11-01), Chaput et al.
patent: 5287401 (1994-02-01), Lin
patent: 5513251 (1996-04-01), Rochkind et al.
patent: 5515426 (1996-05-01), Yacenda et al.
patent: 5604796 (1997-02-01), Yamazaki
patent: 5649002 (1997-07-01), Brady et al.
Ito Takako
Kamimoto Kouichi
Yamanishi Koji
Matar Ahmad F.
Matsushita Electric - Industrial Co., Ltd.
Wolinsky Scott
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