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Chapter 5: Local Management
5-28 2E48-27R/2E49-27R User’s Guide
5.7.10 Configuring the COM Port
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:
1. Use the arrow keys to highlight the Com field.
2. 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.
!
CAUTION
Before altering the COM port settings, ensure that the
2E4X-27R is set with a valid IP address. (Refer to
Section 5.7.1, Setting the IP Address.) Read this entire COM
port configuration section before changing the settings of the
COM port.
!
CAUTION
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 Appendix C) to
reestablish COM port communications.
!
CAUTION
If the COM port is reconfigured without a valid IP address set
on the device, the message shown in Figure 5-14 displays.
Do not continue unless the outcome of the action is fully
understood.