SIP Trunk between CUCM 7.x and CCCM 5.x

Unanswered Question
Jul 7th, 2010


Is it possible to create a SIP Trunk ( Not ICT) between 2 Call manager servers present in 2 different networks with routing enabled between them. If Yes,

could someone help with its configuration.

Thanks in Advance


I have this problem too.
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Adrian Saavedra Wed, 07/07/2010 - 08:02


Yes. Here you can find General Deployment Considerations for SIP Trunks:

Here you can find information for configuration:

Why you want to use SIP?. ICT H.323 is the simplest way to communicate CM clusters.

Hope it helps, if it does please rate.

Kind regards,

- Adrian.

Jaime Valencia Wed, 07/07/2010 - 09:13

I agree with Adrian, while it's technically possible to create a SIP trunk between 2 CUCMs, the highest level of compatibility and features is achieved by using an ICT non-GK controlled

Any particular reason to do SIP over an ICT?



If this helps, please rate

abraham23482 Wed, 07/07/2010 - 11:00

Management decided to go with SIP trunk between the 2 clusters thats why.

I made it work somehow... Thanks both of you..

marcoaurrutia Wed, 07/07/2010 - 11:50

Hi Abrahm

I recommend you that use the ICT (non-gatekeepr), for this conecction between this CM,

go to Gateway/Trunk/ICT,



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