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sip trunk no incoming audio - nat issue?

Hi All

I've configured a sip trunk with a UK sip provider (voiptalk) - registration is ok and outgoing calls go through but I'm only getting 1 way audio (outgoing) no incoming audio.

I guess this is a nat issue? My CCME is behind a nat'ed 857 router.

Also incoming calls don't get through.

What options do I have? Is there anyway to force CCME to send the public ip instead of it's private ip?

What firewall ports do I open up?

Or do I need to configure to bypass NAT?

Thanks in advance

1 REPLY
Hall of Fame Super Gold

Re: sip trunk no incoming audio - nat issue?

The 857 should do nat fine, how it is configured ?

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