Core Issue
The carrier is sending four digits and the user wants the Direct Inward Dialing (DID) of 0760 to map to an internal extension of 7300.
Resolution
The translation can be performed on the gateway or on the Cisco CallManager.
If you have a Cisco IOS Software gateway, a translation rule can be created and applied to the outbound Voice over IP (VoIP) dial peer. The following is an example configuration:
translation-rule 1
rule 1 ^0760 7300
dial-peer voice 10 voip
translate-outgoing called 1
On Cisco CallManager, make a translation pattern and change the called party number from 0760 to 7300.
For more information on Tranlsation rule refer to Mapping Outbound VoIP Calls to Specific Digital Voice Ports and Mapping Outbound Calls to Unique FXS/FXO Ports on Analog Gateways
