Howto:What Ports are used for Signaling and Voice Traffic in SIP and H.323?
What Ports are used for Signaling and Voice Traffic in SIP and H.323?
Applies To
This information applies to
- All innovaphone products
Build V6 and later
More Information
Here is described what ports are used for signaling and voice traffic.
For network, priority firewall and third party product settings
Signaling
SIP
| SIP Phone Registration 1 | UDP:5060 |
| SIP Phone Registration 2..n | UDP: any free |
| PBX | UDP:5060 |
| Gateway Interfaces "Registrar" | UDP:5060 |
| Gateway Interfaces "Without Registration" | UDP:5060 |
| Gateway Interfaces "Register as… " | UDP:any free |
H.323
| Phone Registration 1 | UDP:1718, UDP:1719, TCP:1720 |
| Phone Registration 2..n | UDP:any free, UDP:any free, TCP:any free |
| PBX | UDP:1718,UDP:1719,TCP:1720 |
| Gateway Interfaces "Gatekeeper" | UDP:1718,UDP:1719,TCP:1720 |
| Gateway Interfaces "Without Registration" | TCP:1720 (no RAS) |
| Gateway Interfaces "Register as ..." | UDP:any free, UDP:any free, TCP:any |
T.38 via H.323 or SIP
The T.38 UDP Port is always 2 Ports above the RTP-Port
Voice Traffic (RTP)
For one voice connection there is only one RTP port in use and one RTCP port .
So every call takes 2 ports, that’s any free UDP-ports what is chosen by the
RTP port range. The RTP port range is per default from 16384 to 32767
This UDP-RTP port range can be configured (is used then for H.323 and SIP calls)
Enter the first UDP - port and the number of ports
(Smallest range to be configured is128)
Config option – Fixed RTP port
The config option “Fixed RTP-Send Port xxx ” is not in the GUI configurable.
You have to add this in the config file.
For all connection this one configured RTP port is used. This Fixed RTP-Send Port is detached from the RTCP port.
But we strongly advise not to configure this, because the RTP is not working symmetric anymore and this can bring many interoperability problems with third party endpoints.