Telephone circuit

Details Telephone circuit Telephone circuit

1996-03-22

1997-12-16

Kuntz, Curtis

Telephonic communications

Reception of calling information at substation in wireline...

Blocking caller id transmission

379215, 379372, 379 96, 379 98, 375222, 375327, 375376, H04M 156, H04M 1506, H04B 1302, H03D 318

Patent

active

056994184

ABSTRACT:
A single phase locked loop based device is used to detect alert tones and to decode data in caller display services signalling systems. The device has two sets of components (resistors) to configure the device to perform tone detection and data decoding. One or both of the sets of components are connected to the device by an electronically controlled switch.

REFERENCES:
patent: 4369338 (1983-01-01), Soulliard
patent: 4677663 (1987-06-01), Szlam
patent: 4860340 (1989-08-01), Suzuki
patent: 5263084 (1993-11-01), Chaput et al.
patent: 5537448 (1996-07-01), Schwarz et al.
patent: 5574777 (1996-11-01), Lewis

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