Studio Technologies Model 46A Dual 2-Wire to 4-Wire Intercom InterfaceThe Model 46A is designed to interface 2 wire full duplex party line (PL) intercom circuits with 4 wire audio circuits associated with matrix intercom systems. Other specialized audio system interfacing applications can also be supported. The Model 46A provides two independent full featured 2 channel interfaces. Each interface contains two hybrid circuits which include automatic nulling capability. The analog circuitry, under software control,
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Studio Technologies Model 46A Dual 2-Wire to 4-Wire Intercom Interface