Cabletron Systems 2E48-27R 用户手册

Chapter 5: Local Management

Upon power up, the COM port is configured to the default settings of 
ENABLED and LM.

The 2E4X-27R COM port supports the following applications:

Local Management connections

American Power Conversion (APC) Uninterruptible Power Supply 
(UPS) connections

To configure the COM port, proceed as follows: 

Use the arrow keys to highlight the Com field.

Press the SPACE bar to choose either ENABLED or DISABLED. 
The COM port must be ENABLED for the LM or UPS application. 
Selecting DISABLED disallows the COM port connection to the 
terminal, providing additional device security.

Before altering the COM port settings, ensure that the 
2E4X-27R is set with a valid IP address. (Refer to 

port configuration section before changing the settings of the 
COM port.

Do NOT disable or alter the settings of the COM port while 
operating the current Local Management connection through a 
terminal. Altering the COM port settings disconnects the Local 
Management terminal from the port, and ends the Local 
Management session. If the 2E4X-27R was previously 
assigned a valid IP address, reenter Local Management by 
establishing a Telnet connection to the device. If the device 
does not have a valid IP address and the COM port has been 
disabled or the settings changed, reset NVRAM on the 
2E4X-27R using Mode Switch 7 (refer to 

reestablish COM port communications.

If the COM port is reconfigured without a valid IP address set 
on the device, the message shown in 

 displays.

Do not continue unless the outcome of the action is fully 
understood.