Changing Serial Port Communication Parameters
Page 6-3
Enter the port mode and press <Enter>. This option defaults to console for a console
connection and down for a modem connection. You can also configure the port for SLIP.
If you are configuring the modem port, you should plan the mode configuration care-
fully. See Configuring the Modem Port on page 6-3 for further information.
♦ Important Note ♦
You cannot configure the console port as an auxiliary
port (AuxConsole).
9. The following prompt displays:
Set (and save) these settings {(S)ave/(Q)uit) (Save) :
Enter save to accept the parameters you entered and exit, or enter quit to exit this
command without saving your changes.

Changing Port Speed When Communication With The Switch Lost

When you cannot communicate with the switch, there is an alternative method you can use to
toggle through the various serial port speed options. The port defaults to 9600 bps. But if you
send a Break signal (by pressing the BREAK key), the port speed will change to the next
higher speed. When it reaches the highest speed (38400 bps), it toggles back to the lowest
speed (1200 bps). You cycle through the port speeds in the following order: 9600–19200––
38400–1200.
♦ Note ♦
On the MPX you must remove the default baud rate
shunt (E1), which fixes the baud rate at 9600 bps,
before you can change the baud rate. This shunt is
located near the front end of the circuit board, just to
the right of the Ethernet management port.

Configuring the Modem Port

If you plan to use the modem port as your main connection to User Interface software, then
you need to make sure its mode and jumper settings are configured correctly.

Modem Port Mode

The ser command allows you to configure an active modem port to SLIP, console, or auxil-
iary console mode. When using a modem, it is recommended that you configure the two
ports as follows:
modem port mode=SLIP
console port mode=console
This configuration allows you to use the modem port to access User Interface software
through a SLIP connection. The console port is used as an optional way to access software.
♦ Please Note ♦
You need Release 3.2 or above to use the modem and
console ports simultaneously.
Another valid configuration is as follows:
modem port mode=console
console port mode=down