ZyXEL Communications P-2900-4HB User Manual

 Chapter 1 Getting To Know Your ZyXEL Device

P-2900-4HB User’s Guide

The USB port is useful if you have an USB-enabled computer that does not have a 
network interface card available for attaching to the ZyXEL Device’s LAN network. 
See the Quick Start Guide for details about USB driver installation procedures.

You can install up to two optional battery packs in the ZyXEL Device’s battery bay. 
This will ensure that any phones attached to the device during a power outage will 
continue to function for a time. See the Quick Start Guide for details about battery 
packs intallation procedures.

The standby time for a single battery is approximately 8 hours while the usage 
time is approximately 5 hours.

USB 

Green

On

A computeris connected to the USB port on the 
ZyXEL Device. See 

 for 

more information about the USB port.

Blinking

The ZyXEL Device is sending/receiving data via 
the USB port. 

Off

The USB port is not connected.

PHONE 1-4 Green

On

The ZyXEL Device has successfully registered to 
an IP telephone network.

Blinking

The phone port is in use or is getting VoIP settings 
from the MTA auto-provisioning server.

Off

The phone port is not connected or has not yet 
connected to the MTA auto-provisioning server.

BATTERY

Green

On

• The ZyXEL Device is starting up.
• The battery has sufficient power and the ZyXEL 

Device is using AC power. The LED turns off if 

the ZyXEL Device uses battery power.

Blinking

The battery power is low.

Off

• The ZyXEL Device is receiving sufficient power 

from the battery if the PWR LED is blinking at 

the same time.

• The ZyXEL Device is not receiving power from 

the battery nor AC power.

Note: The device cannot function when there is 

a power outage.

Table 1   Front Panel LEDs (continued)