How to connect two Asterisk PBXs using a SIP Friend Pairing Trunk
A PBX can run in one of three "types" of trunking modes:
- User - This can be thought of as the user account on the destination PBX used by a Peer
- Peer - This is the server part of the trunk
- Friend - This is both a user and a peer together
The User and Peer types normally are required to work together in a Peer/User pairing (said cautiously as Asterisk is very flexible!). The Friend account is a combination of both and is simpler to create than a User/Peer pairing. Some don't like it because their is only one username and one password for both PBXs.
Here's an example Friend pairing configuration made on the following SIP trunk Peer/User pairing configuration tool:
