sipgate basic Help

Local Port selection and Using multiple VoIP phones

Using non-default local ports in your phone settings can avoid many of the most commonly encountered router and firewall related problems.

 For two or more SIP terminals (VoIP phones) to function reliably behind the same router, each SIP Terminal should use different local UDP ports.

Even if you are using a single device only, changing the default 'Local' or 'Listen' ports used by your VoIP phone can avoid many potential router related issues. 

 Most VoIP phones and devices will be pre-configured to use the following ports:

  • Listen SIP Port: 5060
  • Listen RTP Port: 5004

Instead, set your first VoIP phone to use:

  • Listen SIP Port: 46160
  • Listen RTP Port: 46104

For the next VoIP phone use:

  • Listen SIP Port: 46260
  • Listen RTP Port: 46204

 For additional VoIP phones or devices, continue increasing the ports so that each additional phone uses a successive SIP port like:

46160, 46260, 46360, 46460, etc

and the same for the starting RTP port:

46104, 46204, 46304, 46404, etc.

If your SIP device requires Start (Min) and End (Max) local RTP port values to be specified, it should be sufficient to use RTP port ranges like
46104 - 46120, 46204 - 46220, 46304 - 46320, etc.
 If issues arise after changing the Local Ports used by your VoIP devices, please test with STUN enabled and disabled in your phone's Settings.
For further guidance please see:

What is STUN? What is sipgate's STUN Server?



Don't confuse sipgate's SIP Server ports (which are always 5060) with your phone's local ports!
Some multi-line VoIP devices use a Global Local SIP port (e.g. Aastra, Siemens Gigaset and Snom devices).
Other multi-Line devices use a different Local SIP Port for each active Account or Line (e.g. Grandstream, Yealink deskphones and Cisco/Linksys Small Business devices). 
The Local SIP Port is sometimes called the 'SIP Signalling Port' or 'Listen SIP Port'. The Local RTP Ports may be called the 'Audio' or 'Media' ports.
Changing your Phone's Local UDP Port Settings: 
Please click here for help finding your phone's local port settings.
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