[Serusers] Spontaneous UDP Port Change on SMC Router

[Andres]

Hi,

This is a new one for us.  We were getting complaints of dropped calls 
from one of our subscribers.  We analyzed sample calls and it turns our 
his SMC Router is spontaneously changing the source UDP port of the 
media stream in the middle of the call! 

Has anybody else seen this strange behaviour on any router?

The problem also affects SIP registrations.  Even with a Keep Alive of 3 
seconds in the Sipura settings, the SMC spontaneously changes ports 
every 5-6 minutes. 

-- 
Andres
Network Admin
http://www.telesip.net