LYNCH

Description

PULSE CODE MODULATED SYSTEMS FOR THE TRANSMISSION OF VOICE, DATA, TELETYPEWRITER, TELEX, AND COMBINATIONS THEREOF OVER CABLE AND MICROWAVE TRUNK AND SUBSCRIBER CIRCUITS, SAID SYSTEMS COMPRISING CHANNEL BANK UNITS, SPAN LINES, SPAN LINE SWITCHING UNITS, SPAN LINE TERMINATING SHELVES, REPEATERS, FAULT TERMINALS, FAULT FILTERS, CONTROL UNITS, PULSE CODE TRANSMITTERS AND RECEIVERS, POWER SUPPLIES, SOFTWARE-CONTROLLED VOICE CONCENTRATORS, ALARM UNITS, LEAD CONDITIONING UNITS, MULTIPLEXERS, AND SUBSCRIBER CARRIER REMOTE TERMINALS; DIGITAL AND ANALOG ELECTRONIC SUBSCRIBER SWITCHING UNITS; COMPANDORS; BASEBAND, VOICE-FREQUENCY, AND HIGH-FREQUENCY COMBINERS; TELEPHONE SET PANELS; TELEPHONE ORDER-WIRE AND TEST PANELS; CIRCUIT TERMINATION PANELS; AUTOMATIC SUBSCRIBER TEST UNITS; AND PARTS FOR ALL OF THE ABOVE