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3CX 404 not found

lav180
Newbie
Posts: 1
Registered: 25-07-2008

3CX 404 not found

Hi All,
I have a 3CX system with Snom M3 phones. The VOIP Line is registered OK in 3CX and phones are registered OK with 3CX.
When I place a call through F9 my 3CX server returns Call to sip 02012345678@sip2.plus.net:5060 has failed, cause 404 not found from IP 79.135.125.154:5060.
The DNS on the 3CX machine is working OK, It resolves sip2.plus.net to either 79.135.125.155 or 154
If I place a call from pstn to the number associated with my account the call gets through OK and the quality is OK.
Any ideas?
Many thanks,
Pete