Hi, new to the board and to 3CX. Very nice package and look forward to learning more. Currently I'm evaluating 3CX (7.1 free version) and since I've been a long time network engineer using Cisco products, I'm looking for some guidance and configuration examples for setting up a SIP trunk between the 3CX system and a Cisco Call Manager so that calls can be passed back and forth to Cisco gateways and phones registered to the Call Manager. If it is possible, are there specific versions of Call Manager that you must have (4.2 preferably). Do you have any configuration examples to assist? Further, is it possible to set up the same between a 3CX system and a Call Manager Express system? Thanks in advance!!!