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

2008-01-17T09:43:14Z

AlexanderBesold: /* 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 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===

{| border="1"
|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===

{| border="1"
|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):

[[image: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 iscan 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

[[Category:Howto|{{PAGENAME}}]]

innovaphone wiki - User contributions [en]

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