User's Manual
Table Of Contents
- DOCUMENT PURPOSE
- GNU GPL INFORMATION
- WELCOME
- PRODUCT OVERVIEW
- INSTALLATION
- GETTING TO KNOW GXP1610/GXP1620/GXP1625
- CONNECTING TO DEVICES
- RESTORE FACTORY DEFAULT SETTINGS
- EXPERIENCING THE GXP1610/GXP1620/GXP1625
Firmware Version 1.0.0.11 
GXP1610/GXP1620/GXP1625 User 
Guide 
Page 18 of 31 
Message Waiting Indicator 
Message Waiting Indicator. 
Red LED Indicator to display the current phone status 
  Flashing Red. Missed call (s), New voice mail(s), New SIP 
Message (s) 
  Fast Flashing Red. Upgrade 
MAKING PHONE CALLS 
HANDSET, SPEAKER AND HEADSET MODE 
The  GXP1610/GXP1620/GXP1625  allows  users  to  switch  among  handset,  speaker  or  headset  when 
making calls. Press the Hook Switch to switch to handset; press the Headset button to switch to headset; 
or press the Speaker button   to switch to speaker. 
SIP ACCOUNTS AND LINES 
GXP1620/GXP1625 can  support  up to  2 independent SIP accounts;  and GXP1610 can  support  1 SIP 
account. Each account is capable of independent SIP server, user and NAT settings. Each of the LINE 
button is "virtually" mapped to an individual SIP account. In off hook state, select an idle line and the dial 
tone will be heard. 
To make a call, select the line you wish to use. The corresponding LINE LED will light up in green. The 
user can switch lines before dialing any number by pressing the LINE buttons. 
For example: If 2 independent accounts are registered on GXP1620/GXP1625, when LINE 1 is pressed, 
the LINE 1 LED will light up in green. If LINE 2 is pressed, the LINE 2 LED will light up in green and the 
subsequent call will be made through SIP account 2. 
Incoming calls to a specific account will attempt to use its corresponding LINE if it is not in use. When the 
"virtually" mapped line is in use, the GXP1610/GXP1620/GXP1625 will flash the other available LINE in 
red. A line is ACTIVE when it is in use and the corresponding LED is red. 
COMPLETING CALLS 
There are several ways to complete a call. 
  On hook dialing. Enter the number when the phone is on hook and then send out. 
  When the phone is in idle, enter the number to be dialed out; 










