Hi,
For IP call you need to open specific ports that vary according to configurations.
Here is the ports range varying according to port allocation set to dynamic or static
Dynamic: The system will allocate which ports to use when opening a TCP connection. The
reason for doing this is to avoid using the same ports for subsequent calls, as some firewalls
consider this as a sign of attack. When Dynamic is selected, the H.323 ports used are from 11000
to 20999. Once 20999 is reached they restart again at 11000. For RTP and RTCP media data, the
system is using UDP ports in the range 2326 to 2487. Each media channel is using two adjacent
ports, ie 2330 and 2331 for RTP and RTCP respectively. The ports are automatically selected by
the system within the given range. Firewall administrators should not try to deduce which ports are
used when, as the allocation schema within the mentioned range may change without any further
notice.
Static: When set to Static the ports are given within a static predefined range [5555-6555].
For H.323: these are the port range when static is configured.
* Gatekeeper Discovery (RAS) - Port 1719 - UDP
* Q.931 call Setup - Port 1720 - TCP
* H.245 - Port Range 5555-5574 - TCP
* Video - Port Range 2326-2485 - UDP
* Audio - Port Range 2326-2485 - UDP
* Data/FECC - Port Range - 2326-2485 - UDP
Hope this helps.
