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Secondary port can be remote base, link radio or slaved duplex repeater.
Touch-Tone remote control and programming. Hang timer, ID timer, Timeout timers, Fan Timer, and CW messages stored in non-volatile memory. Individual audio gating on each port allows use of non-squelched receiver audio. LED CAS, PTT, and DTMF indicators for primary port. CAS and PTT indicators for secondary port.