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sdp-anat on CME with 9971 SIP

tato386
Frequent Contributor
Frequent Contributor

I have several 9971 phones running SIP and working well on a CME 8.6 system. The CME also has plenty of SCCP phones running on it. I recently tried to add a 9971 phone that connects to the CME via VPN so therefore it is coming from a non-local subnet.

There is no firewall and no NAT involved. The phone registers but cannot call to any extension.

Doing a debug I basically see this: INVITE from 9971 require: sdp-anat from CME 420 bad extension unsupported: sdp-anat Why does the phone think it needs NAT? How do I tell the phone to not require this, or conversely, enable it on the CME to make the phone happy?

Thanks, Diego

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