Subscriber line system having a dual-mode filter for voice commu

Details Subscriber line system having a dual-mode filter for voice commu Subscriber line system having a dual-mode filter for voice commu

1998-03-12

2000-09-05

Chan, Wing F.

Telephonic communications

Subscriber line or transmission line interface

H04M 100

Patent

active

061154660

ABSTRACT:
A dual-mode filter network for an Asymmetric Digital Subscriber Line (ADSL) has a first frequency response when the Plain Old Telephone Service (POTS) telephone is on-hook and has a second frequency response when the POTS telephone is off-hook. A detector is used to determine the on-hook/off-hook status. The dual-mode filter network may be situated at the central unit and connected to a Public Switched Telephone Network (PSTN) while the detector at the re-mote unit connected between the POTS low pass filter and the POTS telephone. In such case, the detector outputs a signal which is transmitter via the twisted pair on an overhead channel. Alternatively, the dual-mode filter and the detector may be co-located at either the central unit or at the remote unit. Regardless of where it, or the detector are located, the dual-mode filter network has at least different combinations of components which are activated, depending on the on-hook/off-hook status of the POTS phone.

REFERENCES:
patent: 5329588 (1994-07-01), Willocx et al.
patent: 5339019 (1994-08-01), Benz
patent: 5343520 (1994-08-01), Willocx et al.
patent: 5577161 (1996-11-01), Pelaez Ferrigno
patent: 5623543 (1997-04-01), Cook
patent: 5625318 (1997-04-01), Sevenhans et al.
patent: 5627501 (1997-05-01), Biran et al.
patent: 5680393 (1997-10-01), Bourmeyster et al.
patent: 5848150 (1998-12-01), Bingel
patent: 5889856 (1999-03-01), O'Toole et al.
IEEE Journal On Selected Areas In Communications, vol. 13, No. 9 Dated Dec. 1995 ADSL and VADSL Splitter Design and Telephony Performance by Jim Cook and Phil Sheppard.

Affiliated with

Also associated with

Rating

Subscriber line system having a dual-mode filter for voice commu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Subscriber line system having a dual-mode filter for voice commu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subscriber line system having a dual-mode filter for voice commu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2220601