The company wants all Singapore numbers to be displayed as a local number without the Singapore country code (65) that is received through the SIP trunk.

For example, the company wants to display number 66816640 instead of 6566816640

In this case, you can configure Adapt Caller ID on SIP trunk, and set the rules as follows:

  • Patterns: 65[3689]XXXXXXXX.
  • Strip: 2
  • Prepend: Leave it blank.

Once this is done and you can see the difference for inbound caller ID: