Appendix C. PinoutsC-2 ESU LT User Manual 61200410L1-1Control-In/Chain-InUse this as an EIA-232 port for connection to a computer ormodem (chain-in) or another ESU (chain-out). See Table C-2for the pin assignment for this connector.Table C-2. Control-In/Chain-In Pin AssignmentsConnector TypeProduct NumberRJ-48AMP# 555164-2Pin Name Description1 GND Ground connected to unit chassis2 UNUSED —3 RXDATA Data received by the ESU4 UNUSED —5 TXDATA Data transmitted by the ESU6 UNUSED —7 RI Ring indicate from modem8 UNUSED —
