POINT TO POINT COMMUNICATION EQUIPMENT AND ACCESSORIES-NAMELY, TRANSMITTERS, RECEIVERS, MULTIPLEXERS, COMBINERS, AMPLIFIERS, ANTENNA DUPLEXERS, FILTERS, PADS AND TRANSFORMERS, POWER SUPPLIES, BATTERY DISTRIBUTION UNITS, FUSE AND ALARM PANELS, CIRCUIT BREAKER PANELS, POWER SUPPLY COMBINING PANELS, SERVICECHANNEL PANEL, TELEPHONE SET PANEL, A-C RINGDOWN CONVERTER, E & M-TO-LOOP-DIAL CONVERTER, BATTERY AND RINGING SUPPLY PANEL, PRE-PAY PAY-STATION SIGNALING UNITS, PILOT OSCILLATOR UNIT, PILOT RE...