Telephone line converter module provides the talk battery, ring generation and off hook detection necessary to operate a standard telephone; also provides the ring detection and line seizure needed when connecting to a pbx station 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 synchonous serial data via a rs-422 interface; an onboard 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 5855-01-225-5855
NSN 5985-01-201-1271
NSN 5996-01-381-0868
NSN 6135-01-499-3516
NSN 5855-01-608-6492
NSN 5930-00-835-0340
NSN 6145-00-815-1369
NSN 4140-00-459-9045
NSN 6610-01-065-1073
NSN 5945-01-456-5450
NSN 5996-01-619-1540
NSN 6135-01-623-6992