How to answer INFO messages from sip provider?

[Victor Elizarov]

Hi!

During outgoing call (cucm--cube--sip provider) provider send us INFO messages to re-check media session. Our CUBE don't resend it to CUCM and don't answer this messages. So long call drops after timeout.

How we can make our CUBE to answer this messages?

[Sreekanth Narayanan]

The CUBE doesn't support all types of content coming in on INFO messages. You need to configure the CUBE to pass-through any content that it doesn't understand, like the check for media session.
Here is a short note on this. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-cube-sip-info-messages.html

[Victor Elizarov]

Sreekanth, thanks for your answer. I've applied pass-thru content unsupp command but there is no changes.

Is it any way (maybe voice sip-profiles) to make CUBE to answer on this messages for example 200OK?

[Sreekanth Narayanan]

No we cannot make the CUBE send a 200 OK for the INFO message because it's acting as a B2B User Agent here. It's not a terminating endpoint so it doesn't have a way to process that INFO and respond to it.