Two-line subscriber system

Details Two-line subscriber system Two-line subscriber system

1997-04-25

1999-05-18

Eisenzopf, Reinhard J.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

37910204, 379 9001, H04M11/00;1/00

Patent

active

059057955

ABSTRACT:
A two-line subscriber system (10) includes a remote channel unit (20) coupled to a central office (14) by a single telephone line (16). The remote channel unit (20) provides additional line capability to a customer premises (18) by allowing a first telecommunications unit (22) and a second telecommunications unit (24) to operate despite having only a single telephone line (16). The remote channel unit (20) operates from a local power source (26), such as a battery or customer premises alternating current, to provide operating power to the first telecommunications unit (22) and the second telecommunications unit (24). In response to a loss of the local power source (26), the remote channel unit (20) cuts a connection to the second telecommunications unit (24) and passes line power from the single telephone line (16) to the first telecommunications unit (22) for continued operation of the first telecommunications unit (22).

REFERENCES:
patent: 4459434 (1984-07-01), Benning et al.
patent: 4538031 (1985-08-01), Benning et al.
patent: 4575584 (1986-03-01), Smith et al.
patent: 4647721 (1987-03-01), Busam et al.
patent: 4797874 (1989-01-01), Chahabadi et al.
patent: 4853949 (1989-08-01), Schorr et al.
patent: 5051720 (1991-09-01), Kittirutsunetorn
patent: 5056132 (1991-10-01), Coleman et al.
patent: 5216704 (1993-06-01), Williams et al.
patent: 5392023 (1995-02-01), D'Avello et al.
patent: 5818819 (1998-10-01), Hallock et al.

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