External apparatus for monitoring a communication system

Details External apparatus for monitoring a communication system External apparatus for monitoring a communication system

1994-07-27

1995-10-17

Chin, Stephen

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

With blocking of normal usage

379 16, 379 32, 379 34, 370 13, 370 15, H04M 121, H04M 308, H04M 322, H04J 116

Patent

active

054597722

ABSTRACT:
An external monitoring system operating for a communication system comprising a common channel signaling unit for separating a message communication function from a communication function and for transmitting a data communication signal through an exclusive line, a signal processing unit for processing the communication using the common channel signaling unit, and an alarm processing unit for generating an alarm signal when an abnormal condition has arisen in the communication associated with the common channel signal processing unit, the alarm processing unit includes an external communication monitoring unit for monitoring an abnormal condition in communication control by the signal processing unit.

REFERENCES:
patent: 4086446 (1978-04-01), Taylor
patent: 4421955 (1983-12-01), Mori et al.
patent: 4661971 (1987-04-01), Nemchek
patent: 4860281 (1989-08-01), Finley et al.
patent: 4864598 (1989-09-01), Lynch et al.
patent: 5018184 (1991-05-01), Abrams et al.
patent: 5049873 (1991-09-01), Robins et al.

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