Early Media - Early Offer VS Late Offer and Prack

[Rafael Diego Farias de Oliveira]

Hello,
I have some doubts on the issues below:

I know that the Early Offer sends the sdp in the invite and the Late Offer sends the sdp in ack.
Know the reliability PRACK adds a layer to a flow of another unreliably calls.

how it really works and how to identify problems related to the issues above.

do you have any indication site and document that can help me?

[Terry Cheema]

For CUCM refer to below sections of the SRND:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10/trunks.html#pgfId-1342237

Also refer to below document for CUCM and CUBE config:

Ref: http://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/117300-configure-cube-00.html

Let me know if you have any more questions after reading the above.

-Terry

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