External Backup Power Supply Connector; Console Port; Leds - ZyXEL Communications XGS-4728F User Manual

3.2.2 External Backup Power Supply Connector

The Switch supports external backup power supply (BPS).
The Switch constantly monitors the status of the internal power supply. The
backup power supply automatically provides power to the Switch in the event of a
power failure. Once the Switch receives power from the backup power supply, it
will not automatically switch back to using the internal power supply even when
the power is resumed.

3.2.3 Console Port

For local management, you can use a computer with terminal emulation software
configured to the following parameters:
• VT100 terminal emulation
• 9600 bps
• No parity, 8 data bits, 1 stop bit
• No flow control
Connect the male 9-pin end of the RS-232 console cable to the console port of the
Switch. Connect the female end to a serial port (COM1, COM2 or other COM port)
of your computer.

3.3 LEDs

The following table describes the LEDs.
Table 3 LEDs
LED
BPS
PWR
SYS
XGS-4728F User's Guide
COLO
STATUS DESCRIPTION
R
Green Blinking The system is receiving power from the backup power
supply.
On The backup power supply is connected and active.
Off The backup power supply is not ready or not active.
Green On The system is turned on.
Off The system is off.
Green Blinking The system is rebooting and performing self-diagnostic
tests.
On The system is on and functioning properly.
Off The power is off or the system is not ready/
malfunctioning.
Chapter 3 Hardware Overview
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