Caller ID telephone with signal attenuation

Details Caller ID telephone with signal attenuation Caller ID telephone with signal attenuation

1996-05-24

1998-11-10

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379142, 379252, 379215, H04M 1100

Patent

active

058360093

ABSTRACT:
A telephony call waiting feature is provided wherein a caller ID information related to a third party wishing to converse with a first party already engaged in a conversation with a second party is provided to the first party. When the local office sends an alerting tone (e.g., CAS) to the first party, the first party telephone set responds by attenuating signals going to the first party handset. The local office then transmits the caller ID information relating to the third party and the first party apparatus receives and displays to the first party the caller ID information related to the third party thereby allowing the first party to either accept or reject the waiting call based on the displayed information.

REFERENCES:
patent: 4955055 (1990-09-01), Fujisaki et al.
patent: 4982427 (1991-01-01), Nicolai
patent: 5263084 (1993-11-01), Chaput et al.
patent: 5410541 (1995-04-01), Hotto
patent: 5615256 (1997-03-01), Yamashita

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