What is the call flow (legs) when making external b2b calls

[carl_townshend]

Hi 

We have a VC, connected to CUCM, this has a trunk to the EXP-C > EXP-E

What would be the call flow and typical legs of a call when making a call outbound? for example a SIP call

Cheers

[Jonathan Schulenberg]

SIP: endpoint > CUCM > Exp-C > Exp-E

RTP: endpoint > Exp-C > Exp-E