My PBX has 11-digit Destinations (Inbound Routes) and 10-digit Extensions. If extension 1000 dials extension 5141234567 then the call is processed as an internal transfer. However, if extension 1000 dials Destination 15141234567 then the call is sent to an Outbound route and processed via an external gateway. Is there any way to avoid carrier charges and process these calls as internal transfers?