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Third Party SIP phones can't call out via SIP trunk?

Hello,

I have a strange situation, where my registered 8961's can dial out of a SIP trunk to a Portech GSM gateway, but any other third party SIP phones can't.

I have 8 x 8961's registered and all can dial out of a SIP trunk to the GSM gateway. The outbound dialling is controlled by prefix digits of 72! which points to a Route List / Group then to multiple SIP trunks (each to a different port 5064, 5066, etc in order to route to individual SIMs) These work fine.

I also have 20 x Kirk DECT phones registered via the Kirk IP Server as SIP endpoints. They can call all other phones, but they can't dial the 73! pattern.

When 73! is dialled I see the SIP Invite hit the CM, but there is no onward redirect to the SIP trunk.

CM version 8.6(2)

How can I get the CM to redirect the SIP calls?

Any thought gratefully accepted.

Thanks

Chris

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VIP Mentor

Can you attach the CUCM trace here and lets see whats going on. Please inlcude the calling and called number

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