Freepbx endpoint manager - Prepend a code before dialing from an fxo line

[Stewart1 (Stewart)]

Why do you want to use a code at all? Codes are error prone and don’t work well when calling from contacts, device call history, etc.

You can define an Outbound Route that lists the four trunks in whatever order you like. Or, you can define a group.

DAHDi Groups

You probably want to define the groups on the conf file. Then just use the group name you want on the trunk definition, it won’t show the group on the drop-down, but you can still use it anyway, just enter it as gX, where X is the group you defined.