Since you are using Brekeke PBX, you don't have to edit DialPlan.
For accepting a call sent from the SIP trunk, PlacetelPBX , add a new ARS.
http://wiki.brekeke.com/wiki/ARS
http://wiki.brekeke.com/wiki/Setup-for-Connecting-ITSP
Incoming calls on SIP trunk not authorized
Moderator: Brekeke Support Team