Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Patent
1997-12-16
1999-08-24
Loomis, Paul
Telephonic communications
Reception of calling information at substation in wireline...
Blocking caller id transmission
379215, 379411, 379392, H04M 156, H04M 342, H04M 100
Patent
active
059434074
ABSTRACT:
Type 2 caller ID/call waiting (CIDCW) customer premises equipment (CPE) is provided which has a greatly improved method of detecting tones indicating the availability of call information regarding an incoming call while the customer premises equipment is in an off-hook condition. A hybrid echo canceler (HEC) algorithm is added to the customer premises equipment (CPE) to suppress the signal from the microphone of the customer premises equipment from being included in the signal analyzed for the presence of tones. Thus, the microphone of the customer premises equipment need not be muted upon detection of the alerting CAS tone sequence in a Caller ID service. The HEC algorithm runs substantially continuously in a preferred embodiment, and may be combined with a conventionally operating HEC which cancels reflections due to the hybrid or telephone line interface.
REFERENCES:
patent: 5172408 (1992-12-01), Petty et al.
patent: 5263084 (1993-11-01), Chaput et al.
patent: 5420921 (1995-05-01), Lahdemaki
patent: 5600714 (1997-02-01), Eppler, Jr. et al.
patent: 5836009 (1998-11-01), Diamond et al.
Davis Paul Joseph
Iyengar Vasu
Johanson James A.
Popa James Charles
Ubowski Richard
Loomis Paul
Lucent Techologies Inc.
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