Hello

I have a 7200 using SIP trunks behind a Sonic Firewall and it's having an issue with calls cutting off and sometimes silent it's not every call it's more like 1 in 10 I have tried every thing with the phone system it was on version 5.1 but have tried it on 4.98 have upgraded all the other cards this is with the MPS off with it on you get more issues with one way audio rather than cutting off this could just be that they are ending the call before it cuts off, the SIP provider have said the header contains duplicate ip addresses that is causing a loop condition which is the problem so I can't help think it's a fire wall issue but they have said that SIP ALG is off or sonicwalls version of it is off!

Samsung are looking in to this for me as well but just wanted to see if any one here has had a similar issue with these firewalls ?

Thanks