ADSL filter

Details ADSL filter ADSL filter

2006-09-26

2006-09-26

Harold, Jefferey F. (Department: 2614)

Telephonic communications

Telephone line or system combined with diverse electrical...

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

C379S399010, C379S093010

Reexamination Certificate

active

07113575

ABSTRACT:
An ADSL/POTS filter arrangement includes a filter and a switchable return loss correction circuit coupled to one side of the filter. The switchable return loss correction circuit includes a resistor and an inductor connected in parallel, a polarity insensitive solid state switch, and a capacitor connected in series between the switch and the parallel-connected resistor and inductor. The switchable return loss correction circuit is switched on by the polarity insensitive solid state switch which is controlled by a line sensor depending on whether the POTS telephone is on or off-hook.

REFERENCES:
patent: 5349242 (1994-09-01), Tanaka et al.
patent: 5608237 (1997-03-01), Aizawa et al.
patent: 6078794 (2000-06-01), Peckham
patent: 6144735 (2000-11-01), Bella
patent: 36813/99 (2000-01-01), None
patent: 0 967 736 (1999-12-01), None
patent: WO 99/40686 (1999-08-01), None
patent: WO 00/28660 (2000-05-01), None

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