Telephone line converter module provides the talk battery, ring generation and off hook detection necessary to operate a standard telephone; it also provides the ring detection and line seizure needed when connecting to a pbxstation or co trunk; on board is a 2-wire to 4-wire hybrid that separates the transmit and receive audio paths; the board also contains a pulse code modulator and demodulator which converts the audio signals into a serial bit stream; the use of compandors further refine the quality of the audio; the output is 4-wire 600 ohm audio or synchronous serial data via a rs-422 interface; an on board clock generator is provided (selectable data rate from 28kbps to 256kbps) or the system will accept an external clock signal
An electronic device which receives, converts and transmits ringing and/or supervisory or other messages over a communication circuit in the form of audio frequency tones. May include integral interrupters, oscillators and hybrid and filter networks. Excludes generator, ringing, static and generator, ringing, machine.
Classification: Articles designed for connection to telegraphic or telephonic apparatus or instruments or to telegraphic or telephonic networks
NSN 5855-01-424-2287
NSN 5996-00-927-2242
NSN 6130-01-364-5559
NSN 5985-00-010-7754
NSN 5975-00-974-5031
NSN 5985-01-273-4221
NSN 5990-01-408-4188
NSN 6320-01-301-4699
NSN 6105-01-055-6525
NSN 5855-01-184-8089
NSN 6150-01-463-8218
NSN 6110-01-408-4002