Grandstream GXP2200 User Manual - Manual (Page 42)

Firmware Version 1.0.3.26 GXP2200 USER MANUAL Page 41 of 159
Direct IP Call allows two phones to talk to each other in an ad-hoc fashion without a SIP proxy. VoIP calls
can be made between two phones if:

Both phones have public IP addresses;
Or

Both phones are on the same LAN/VPN using private or public IP addresses;
Or

Both phones can be connected through a router using public or private IP addresses (with necessary
port forwarding or DMZ).
To make a direct IP call, please follow the steps below:

Off hook the phone or select account in the idle screen to bring up call screen on GXP2200;

Under "Mode" button in the call screen, tap on it and select the mode as "IP Call";

Input the 12-digit target IP address. 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 (.) and the # key represents the colon (:).

Press "SEND" key or tap on (audio call) / (video call) button to dial.
Note:

The # will represent colon ":" in direct IP call rather than SEND key as in normal phone call;

Port number is not mandatory when making direct IP call;

Users need activate the first account on the GXP2200 to complete direct IP call;

If you have a SIP server configured, direct IP call still works. If the devices are behind NAT, users might
need configure NAT Traversal before using direct IP call. If you are using STUN, direct IP call will also
use STUN;

The phone needs to configure option "User Random Port" to "No" to accept direct IP calls;

In GXP2200 Contacts, if the number is using IP address, direct IP call can be made by dialing this
contact.
ANSWERING A CALL
1. Single incoming call