BT/SN/RAM 6000 Series Hardware Guide 1-20Product Overview Revised 2015-07-16Data Interface Specifications: Serial, Ethernet & USBConnecting the modem to a DCE:In order to connect a modem to another DCE device, a null modem cable configuration is required. If flow controlis not necessary i.e. no handshaking is required, the only pins to be used are TX, RX and GND. TX and RX have tobe crossed between the modem (DCE) and the other DCE device. GND is connected to GND. Disable flow controlon the modem and be sure that the attached device does not check for any of the handshaking signals. Below isan example diagram.In the event that full handshaking is required, all handshaking signals should be cross-connected, i.e. RTS/CTShave to be crossed and DTR/DSR have to be crossed. In addition, TX and RX signals have to be crossed. Below is anexample diagram.For further serial wiring information, refer to Chapter 2 in this manual.