Modify INVITE/SDP in Early Offer

[drbabbers]

All,

How do I modify the INVITE with CUCM on a SIP Trunk? Specifically I would like to remove h.264 from the Early Offer.

SIP Profile/Normalization Script? I have never done this before and am struggling.. So would appreciate any guidance or clear documentation.

Thanks

D

[Chakshu Piplani]

Is the call going out to voice gateway?

Can you paste the current SIP INVITE and the desired SIP INVITE.

[drbabbers]

Hi,

Call flow is from CUCM via SIP Trunk to a CUBE, but my question is can I modify the INVITE at the CUCM side? Or should this be done on the CUBE?

Thanks

D

[Chakshu Piplani]

It will be easier on CUBE, create a sip profile and associate is with dial-peer

You can create a SIP profile like this:

voice class sip-profiles 100
request INVITE sdp-header Audio-Attribute modify "a=rtpmap:97 H264/90000" ""

Hope this helps.

[drbabbers]

Thank you for your help so far. Can you please advise though how this can be done in CUCM? Say that I had no CUBE and this was 2 CUCM clusters with a SIP Trunk, how would I do this in that example please?

Thanks

D

[Chakshu Piplani · Accepted solution]

You can go through this video tutorial:

https://supportforums.cisco.com/video/12151771/guide-sip-normalization-cucm-and-lua-scripting

Regards,

Chakshu

[drbabbers]

Hi Chakshu,

Here is a snippet from the SDP INVITE:

I have highlighted what I would like to remove.

Thanks

D