Network interface modules

Details Network interface modules Network interface modules

1991-04-15

1994-11-22

Dwyer, James L.

Telephonic communications

Subscriber line or transmission line interface

Protective circuit

379399, 361119, H04M 900

Patent

active

053675690

ABSTRACT:
A network interface module for providing connection between a customer's equipment and the telephone company owned portion of the customer loop is provided with a miniaturized easily removable module which includes the overvoltage protection device and the circuitry necessary to provide a prescribed line test termination impedance having a particular characteristic signature to the telephone central office when a continuity test is made on a subscriber line.

REFERENCES:
patent: 4827502 (1989-05-01), Suffi et al.
patent: 4853960 (1989-08-01), Smith
patent: 4905119 (1990-02-01), Webb
patent: 4910770 (1990-03-01), Collins et al.
patent: 4941063 (1990-07-01), McCartney et al.
patent: 4949376 (1990-08-01), Nieves et al.
patent: 5175662 (1992-12-01), Debalko et al.
Keptel SNI-5000--Network Interface System.
Keptel ML-5 An Interface System for Today . . . and Tomorrow.
Keptel SNI 1500--Indoor Network Interface.

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