CUCM not keeping SIP Headers

[castrillor]

Hi all,

We have a CUCM v6.1 connected to a third party PBX using a SIP trunk and to an external IVR using also a SIP Trunk. The problem is that whe a call is transferred form the external PBX to the External IVR (through CUCM) the Call-Info field in SIP INVITE message Header seems to be overwritte by CUCM. This field is neccessary in order to pass information between external PBX and IVR.

If a connect PBX and IVR directly using a SIP trunk the call info field is passed without problems.

How can I avoid CUCM overwritng headers? Maybe the old CUCM version is a problem?

I would appreciate any help  regarding this.

Thanks and regards

Raul

[Ayodeji Okanlawon · Accepted solution]

Hi,

Unfortunately you will need to do sip Normalization to manipulate this header to one cucm understand but this is not supported in your version.


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[castrillor]

Thanks for your answer,

I guess you are reffering to SIP Normalization Script feature, which is available in version 8.5.

That is not a problem since that is the version the final customer will have (the 6.1 version is the one in my lab). I will try to find any example of that kind of scripts ...

Regards