P POSITRON

RADIO AND TELEPHONE EQUIPMENT, NAMELY, RADIO COMMUNICATION INTERFACES, [ BROADCAST APPARATUS FOR AUDIO AND DATA TRANSMISSION, BOTH WIRELESS AND HARD WIRED, ] TELECOMMUNICATIONS APPARATUS, TELEGRAPH INTERFACE APPARATUS, AND POWER SUPPLY APPARATUS FOR USE IN THE ELECTRONIC FIELD; AND TELEPHONE APPARATUS - NAMELY, HIGH VOLTAGE PROTECTION APPARATUS FOR TELECOMMUNICATION AND/OR TELEPHONE APPARATUS, CONFERENCE CALL CONTROL UNIT, TOLL DENIAL APPARATUS, TELEPHONE/LINE INTERFACE APPARATUS, TELEPHONE CALL REGISTRATION/CONTROL APPARATUS, CENTRAL OFFICE ALARM APPARATUS AND TEST SETS