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 21 of 31 
  When phone is at idle state, press any number key or * key to bring up “Onhook Dialing” page; 
  Press round menu key or "DirectIP" soft key; 
  Input the target IP address (Please see example below) ; 
  Press "OK" soft key to dial. 
For example: 
If the target IP address is 192.168.1.60 and the port is 5062 (i.e., 192.168.1.60:5062), input the following: 
192*168*1*60#5062. The * key represents the dot (.), the  # key represents colon  (:). Wait for  about 4 
seconds and the phone will initiate the call. 
Quick IP Call Mode: 
The GXP1610/GXP1620/GXP1625 also supports Quick IP Call mode. This enables the phone to make 
direct IP calls using only the last few digits (last octet) of the target phone's IP address. This is possible 
only if both phones are under the same LAN/VPN. This simulates a PBX function using the CSMA/CD 
without a SIP server. Controlled static IP usage is recommended. 
To enable  Quick  IP  Call  Mode,  go  to  phone's Web GUI->Advanced  Settings->Call  Features,  set  "Use 
Quick IP - call mode" to "Yes". Clicking on "Save and Apply" on the bottom of Web GUI page to take the 
change. To make Quick IP Call, take the phone off hook first. Then dial #xxx where x is 0-9 and xxx<255. 
Press # or SEND and a direct IP call to aaa.bbb.ccc.XXX will be completed. "aaa.bbb.ccc" is from the 
local IP address regardless of subnet mask. The number #xx or #x are also valid. The leading 0 is not 
required (but it's OK). 
For example: 
  192.168.0.2 calling 192.168.0.3 -- dial #3 followed by # or "SEND"; 
  192.168.0.2 calling 192.168.0.23 -- dial #23 followed by # "SEND"; 
  192.168.0.2 calling 192.168.0.123 -- dial #123 followed by # "SEND"; 
  192.168.0.2: dial #3 and #03 and #003 results in the same call -- call 192.168.0.3. 
Note: 
  The # will represent colon ":" in direct IP call rather than SEND key as in normal phone call; 
  If you have a SIP server configured, direct IP call still works. If you are using STUN, direct IP call will 
also use STUN; 
  Configure the "User Random Port" to "No" when completing direct IP calls. 










