Warning: I'm extremely new to CUCM.
I am curious as to what all is involved in connecting two CUCM (7.1.3 and other) systems together. By this I mean I have a CUCM setup here and someone else has it as well. I want people to be able to make calls between the systems (via IP).
I've stumbled upon SIP trunking as well as Gatekeeper and non-gatekeeper trunking. What are the advantages and disadvantages of each or is there a better way to go about this? Eventually I would like to scale this and allow calls between multiple CUCM systems.