3Com 4200G Getting Started Manual page 35

When you want to use the terminal to configure the switch, follow these
steps to connect a terminal device to your switch using console cables:
1 Plug the DB-9 female connector of the Console cable to the serial port
of the PC or terminal where the switch is to be configured.
2 Connect the RJ-45 connector of the Console cable to the Console port
of the switch.
CAUTION: Pay attention to the mark on the Console port and be sure to
plug the connector to the right port.
If the switch is powered on:
First connect the DB-9 connector of the Console cable to the PC
■
before connecting the RJ-45 connector to the switch.
Disconnect the DB-9 connector of the Console cable from the PC after
■
disconnecting the RJ-45 connector from the switch.
Connecting the Console Cable 35