Howto:What Ports are used for Signaling and Voice Traffic in SIP and H.323?

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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 TCP and UDP ports are used for signaling and voice traffic on innovaphone devices. This information is applicable for firewalls, network devices, traffic shaping and third party product settings.

Signaling

Following listening ports are used on innovaphone devices:

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


H.323

Phone Registration 1 UDP:1718, UDP:1719, TCP:1720
Phone Registration 2..n 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, Additional Ports TCP:2048-2100

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 under IP->Settings (is used then for H.323 and SIP calls).

Enter the first UDP - port and the number of ports (Smallest range to be configured is 128):

What Ports are used for Signaling and Voice Traffic in SIP and H.323 Portsused2.PNG


Config option – Fixed RTP port

The config option “Fixed RTP-Send Port xxx ” is not in the GUI configurable and can be set only via 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.

Related Articels

Reference:Configuration/IP/Settings

Howto:Upgrade_Issues_V5_to_V6#Firewall_and_Network_issues - Information about Ports in V5


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