[VoiceOps] Solving port blocking issue @ softphone

Ryan Delgrosso ryandelgrosso at gmail.com
Thu Jun 26 11:57:24 EDT 2014

Add 2 or 3 more seemingly random ports for the SBC to listen on. Also 
add them in TCP.

have the softphone use DNS naptr records to order UDP then TCP srv 
records, and in each SRV record offer the same proxy with different 
ports. This will cause the softphone to try multiple ports on UDP then 
multiple ports on TCP until it finds success.

If the softphone doesn't support NAPTR, then you can use SRV only but 
you lose the ability to try different transports. If it doesnt support 
SRV records, find another softphone.


On 6/26/2014 7:34 AM, Feby Francis wrote:
> Experts,
> I have a customer who travels a lot and uses our softphone offering, I 
> need a solution to overcome the situations when the port 5060 is blocked.
> Is there any work around to solve the port blocking problems? We use 
> standard 5060 on the SBC and my switch vendor is Broadsoft.
> Thanks for all the help and advices,
> Feby Francis
> _______________________________________________
> VoiceOps mailing list
> VoiceOps at voiceops.org
> https://puck.nether.net/mailman/listinfo/voiceops

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