I have 2 offices. 1 with 3cx and another with Asterisk (FreePBX). To create a connection between the two of them, Asterisk recommends a SIP trunk and 3cx a "Bridge". Does anyone have an idea of the best starting point or documentation? All of the 3cx docs are for connecting 3cx to 3cx. I want to be able to dial extensions from 1 office to the next and seamlessly transfer calls. I've seen others mention that it is possible, but no starting point or reference given.