Passive distributed filter system and method including caller ID

Details Passive distributed filter system and method including caller ID Passive distributed filter system and method including caller ID

1998-02-06

2000-02-22

Loomis, Paul

Telephonic communications

Reception of calling information at substation in wireline...

Blocking caller id transmission

379 9305, 375350, H04M 156, H04M 1506

Patent

active

060289198

ABSTRACT:
A plurality of distributed POTS filters (DPF) are associated with a respective plurality of POTS communications devices and decouple a POTS channel from a telephone connection, while permitting and not interfering with a second communications channel (e.g., DSL, ADSL, SDSL, RADSL, VADSL, etc.) on the telephone connection that is utilized by a modem, and permit the passage of additional signals, such as caller ID signals, to the plurality POTS communications devices. In architecture, the DPF system includes a plurality of POTS communications devices, such as telephones, and a plurality of the DPFs corresponding respectively with and connecting each of the POTS communications devices to the telephone connection. Each of the DPFs comprise an automatic control mechanism, which includes circuitry configured to allow the passage of additional signals, such as caller ID signals, to the plurality of POTS communications devices and a POTS filter. The automatic control mechanism is configured to isolate the POTS filter when a respective POTS communications device is on-hook. Each DPF is configured to permit POTS communications over a POTS channel on the telephone connection with the respective POTS communications device when the POTS communications device is off-hook. Furthermore, a second communications device, such as a DSL (e.g., ADSL, SDSL, RADSL, VADSL, etc.) communications device, is connected to the telephone connection and communicates signals over a second channel. The POTS and second channel are communicated over the telephone connection concurrently without appreciable interference.

REFERENCES:
patent: 5623543 (1997-04-01), Cook
patent: 5724412 (1998-03-01), Srinivasan
patent: 5841841 (1998-11-01), Dodds et al.
patent: 5896443 (1999-04-01), Dichter

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