Calls to the public network

The call from the endpoint routes to the Communication Manager feature server, Session Manager, Communication Manager trunk gateway, and then to the public network.

Even though the feature server is administered for Private Enterprise Canonical numbers, you can change the P-Asserted-Identity (PAI) header to a public long number. To change the PAI header, select a public call type in the respective Route Pattern. For example, pubu in the Call Type field on the ARS DIGIT ANALYSIS TABLE screen.

To adapt the PAI header, use Incoming Call Handling Treatment (ICHT) on the Communication Manager trunk gateway or the number adaptation module in Session Manager. Ensure that you do not have overlaps with the entries for the called number.

Calls from the public network

The call from the public network routes to the Communication Manager trunk gateway, Session Manager, Communication Manager feature server, Session Manager, and then to the endpoint.

In Session Manager, all public numbers must be international numbers with the leading plus (+) sign. The number adaptation module in Session Manager receives the national numbers from the public network and adapts the national numbers to international numbers on the SIP trunk.