BLACK BOX

ELECTRIC AND ELECTRONIC DATA COMMUNICATION APPARATUS; NAMELY, INTERFACE CONVERTERS AND ADAPTORS, PROTOCOL CONVERTERS, CODE CONVERTERS, SWITCHES, MONITORING AND DIAGNOSTIC TESTERS AND TEST METERS, MODULATORS, DEMODULATORS, INTERCONNECTING CABLES, CABLE CONNECTORS AND CONNECTOR ADAPTORS, CABLE CONNECTOR WALL BOXES AND BOX COVERS, PRINTERS, PRINTER CONNECTION ADAPTORS, PRINTER INTERFACE CONVERTERS AND ADAPTORS, CIRCUIT BOARDS, TRANSFORMERS, POWER SUPPLIES, AUTOMATIC COMPUTER ANSWER AND RESPONSE OR DISCONNECT INTERFACE CONVERTERS AND ADAPTORS, COMPUTER TERMINAL AND LINE SHARING INTERFACE ADAPTORS, ACOUSTIC COUPLERS, COMPUTER TERMINAL TIMED DISCONNECT MONITORS, COMPUTER AND COMPUTER TERMINAL TIME USE MONITORS, COMPUTER TERMINAL PRINTER SHARING INTERFACE COVERTERS AND ADAPTORS, AND STRUCTURAL PARTS FOR THE DESCRIBED ELECTRIC AND ELECTRONIC DATA COMMUNICATION APPARATUS