Installation ManualH3C S5500-EI Series Ethernet Switches Chapter 3 Installation3-20RJ-45 Signal Direction DB9(MODEM) DB9(CONSOLE)7 DSR ← 6 48 CTS ← 8 73.4.2 Connection ProcedureWhen you want to use the terminal to configure the switch, follow these steps toconnect a terminal device to the switch using the console cable:1) Plug the DB-9 female connector of the console cable to the serial port of the PC orterminal where the switch is to be configured.2) Connect the RJ-45 connector of the console cable to the console port of theswitch.Caution:Pay attention to the mark on the console port and be sure to plug the connector to theright port.Note:z When connecting a PC to a powered-on switch, you are recommended to connectthe DB-9 connector of the console cable to the PC before connecting the RJ-45connector to the switch.z When disconnecting a PC from a powered-on switch, you are recommended todisconnect the DB-9 connector of the console cable from the PC after disconnectingthe RJ-45 connector from the switch.3.5 Installing and Removing Optional Interface ModulesThe S5500-EI series provide two 10 GE extended module slots on the rear panel. Youcan select the following extended modules:z One-port 10 GE XFP interface modulez Dual-port 10 GE XFP interface modulez Short-haul dual-port 10 GE CX4 interface modules