Analog/digital telephone test set

Details Analog/digital telephone test set Analog/digital telephone test set

1990-12-12

1992-11-10

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

379 29, H04M 330, H04B 346

Patent

active

051630796

ABSTRACT:
An analog/digital telephone test set for telephone lines using dial pulse, DTMF, and digital signalling having a DTMF decoder for converting DTMF tones for application to a microprocessor which converts them, for example, to 16 bit digital commands transmitted as 8 kHz bursts.

REFERENCES:
patent: 4551585 (1985-11-01), Daniels et al.

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