Apparatus for telephone line checking

Details Apparatus for telephone line checking Apparatus for telephone line checking

1992-01-13

1993-08-10

Schreyer, Stafford

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Using portable test set

379 29, 379 30, 379 15, 379 24, H04M 328

Patent

active

052356299

ABSTRACT:
The equipment includes a front panel with LED indicators, key pad and a number of special function keys as well as an LCD message printout and volt/ohm meter. A hand set is readily available at the front panel as the line check unit functions with a commercially available craft terminal, a CMC Type 7910D terminal known as DATASTAR.TM., which includes the master central processing unit and random access memory for interactive function with the line check system. The DATASTAR.TM. unit communicates directly with a controller section that includes speaker power amp, LCD circuitry and 128K random access memory as well as a digital bus interface. The controller board is then connected through both a digital bus and an analog signal bus to an analog circuitry that includes relay control and various signal routing and test signal functions. The analog circuitry is then in communication with the volt/ohm meter and analyzer circuitry.

REFERENCES:
patent: 4945554 (1990-07-01), Krause et al.

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