Limit an Extension (or group of Extensios) to a Trunk (or Group of Trunks)

• Copy from-internal context from extensions.conf and paste it to extensions_custom.conf
• Rename it to custom-trunk-1
• It looks like this
  • [from-internal] <- [custom-trunk-1]     <- Rename
  • ;allow phones to use applications
  • include => app-userlogonoff
  • include => app-directory
  • include => app-dnd
  • include => app-callforward
  • include => app-callwaiting
  • include => app-messagecenter
  • include => app-calltrace
  • include => parkedcalls
  • include => from-internal-custom
  • ;allow phones to dial other extensions
  • include => ext-fax
  • include => ext-local
  • include => ext-group
  • include => ext-queues
  • include => ext-zapbarge
  • include => ext-meetme
  • include => ext-record
  • include => ext-test
  • ;allow phones to access trunks
  • ;include => outbound-allroutes         <- Mark
  • include => outrt-001-OR1               <- Add
  • include => outrt-001-OR3               <- Add
  • exten => s,1,Macro(hangupcall)
  • exten => h,1,Macro(hangupcall)
• Mark the line include => outbound-allroutes
• Open the file extensions_additional.conf and look for the context outbound-allroutes, it looks like this  
  • include => outbound-allroutes-custom
  • include => outrt-001-OR1               <- Copy 
  • include => outrt-002-OR2
  • include => outrt-003-OR3               <- Copy 
  • include => outrt-004-OR4
• Add  the required Outbound Routings, to custom-trunk-1 context
• In the extension setup, set the context to custom-trunk-1, click for a sample