RAD DATA COMMUNICATIONS SRM-6AC Modem Type Data (Asynchronous) Maximum Data Rate 19.2Kbps Data Bus External Data Modulation Protocol Proprietary [Image] CONNECTIONS Purpose Location Purpose Location RS-232/422 CN1 Ground GND Receive positive +RCV Transmit positive +XMT Receive negative -RCV Transmit negative -XMT CD SIGNAL Setting JP1 » Forced high Pins 1 & 2 closed Normal Pins 2 & 3 closed DCE/DTE SELECTOR Setting SW1 » DCE On DTE Off