Call Back to Public Endpoint via Expressway

[VCsupport17]

Hello Community,

We have SX endpoints and Jabber clients registered on CUCM. Also we have Expressway Core and Edge for MRA and B2B/B2C solution and works fine.

I have question, if an external endpoint not registered on CUCM using MRA will call to internal endpoint but missed the call, and will try to call back that address registered on the recent call, call will not connect as expected because it is unknown address. How to makethe internal endpoint registered on the CUCM to call the original address of the external endpoint. Because on the recent call it register xxxx@cucm_IP and not the original public IP of the caller.

Any idea?

[Elias Sevilla Duarte]

The presented URI depends on the endpoint that initiated the call, meaning that the "contact" information received in the internal endpoints, is whatever it was configured in the external endpoint.

In your case, the "callback" is expected to fail, as the URI will be searched as if it was local, and not external.

Basically, the "callback" will work fine if the external endpoint presents the correct information.

[VCsupport17]

Hi elsevill,

Thank you for your response. So it means no configuration will be done on Expressways such as transforms and also on CUCM side? This depends on how the external endpoint (caller) contact information configuration?

[Alok Jaiswal · Accepted solution]

As mentioned its the endpoint who initiated the call. If it sends URI format then you can reach it.

But if it shows as name@cucm ip or number@cucm ip how you will decide what transform you have to apply.

You are not sure what domain the call came in from. Hence practically its not possible, theoretically if you are sure that incoming call always comes in from a particular domain you can achieve this via transforms and search rules.

Regards,

Alok