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General Configuration Screen
Device Configuration Menu Screens 4-13
If the time entered is within the 1 to 30 minutes range, the message “SAVED OK” displays at the
top of the screen. If the entry is not valid, Local Management does not alter the current setting, but
it does refresh the Screen Lockout Time field with the previous value.
4.2.10 Configuring the COM Port
Upon power up, the COM port is configured to the default settings of ENABLED and LM.
The 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 prevents the COM port
connection to the terminal, providing additional device security.
CAUTION: Before altering the COM port settings, ensure that the device is set with a
valid IP address. (Refer to Section 4.2.1.) 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 device 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 device using Mode Switch 7 to reestablish COM port
communications. For details about Switch 7 and its operation. refer to the device
installation user’s guide shipped with your device.
CAUTION: If the COM port is reconfigured without a valid IP address set on the device,
the message shown in Figure 4-5 displays.
Do not continue unless the outcome of the action is fully understood.