RAD DATA COMMUNICATIONS SRM-5D Modem Type Data (Asynchronous) Maximum Data Rate 19.2Kbps Data Bus External Data Modulation Protocol Proprietary [Image] CONNECTIONS Purpose Location Purpose Location RS-232 CN1 Ground GND RJ-12/RJ-45 CN2 Transmit positive +XMT Receive positive +RCV Transmit negative -XMT Receive negative -RCV DCE/DTE SELECTOR Setting SW1 » DCE Off DTE On