Multi-line network interface

Details Multi-line network interface Multi-line network interface

1988-03-03

1989-01-03

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of network terminating interface, subscriber trunk...

379399, 361426, 439718, H04M 124

Patent

active

047962895

ABSTRACT:
Customer telephone line test apparatus enabling a customer having multiple internal telephone lines to determine if telephone line problems are in service company lines or in customer lines. The test apparatus includes a multi-line, customer test type network interface module having telephone circuit test receptacles that are electrically coupled with respective telephone service lines. Telephone jacks for each customer service line and are normally assembled with respective telephone circuit receptacles to complete the telephone circuits with the telephone service supplier. For test purposes, the customer will disassemble a telephone jack from its receptacle and simply insert the modular jack of the telephone in its place. If a clear dial tone is received and the difficulty is eliminated, then the customer is assured that the telephone trouble is in the customer line and not in the service company line.

REFERENCES:
patent: 4647725 (1987-03-01), Dellinger et al.
patent: 4651340 (1987-03-01), Marson

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