Modem use monitor

Details Modem use monitor Modem use monitor

1987-11-27

1989-04-04

Smith, Jerry

Excavating

371 15, 379 1, 379 93, 375 10, H04M 308, G06F 1100

Patent

active

048192350

ABSTRACT:
A modem use monitor (MUM) is disclosed which is utilizable with one or more groups of modems for analyzing modem defects of the individual modems. Typically, a rotary hunt arrangement of telephone lines for data communications is sequentially served by several modems. For analytical purposes, an intercept device is provided to receive a data carrier detect signal from each modem. The intercept device has been enhanced to receive a plurality of signals and to facilitate defect analysis. Exemplary of the processed signals is the summing of the ring indicator (RI) signal and the data carrier detect (SCD) by means of a logical OR to provide a single test signal which can be examined for a ring-no-answer condition.

REFERENCES:
patent: 4385384 (1983-05-01), Rosbury
patent: 4471491 (1984-09-01), Abe
patent: 4520233 (1985-05-01), Smith
patent: 4646320 (1987-02-01), Krishnan

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