extension@CUCM_IP_Address calls for B2B

[VCsupport17]

Hi Community,

Just a quick questions, we have video endpoints registered on CUCM with their SIP address as extension@CUCM_IP_Address format.

For example 9700@10.1.1.100 SIP address of endpoint. We have Expressway Core + Edge in the network and want to integrate this to CUCM to allow the endpoints to call outside the network for B2B calls or using IP address to dial Public IP addresses outside the network.

Is this possible?

Thanks.

[Shashank Mahajan]

You can configure your CUCM and Expressway C/E for B2B calls. Refer to the following link:

http://info.stack8.com/blog/configuring-business-to-business-sip-uri-dialling-with-expressway

[VCsupport17]

Thanks Shashank for reply. I will try to configure the Expressway-C and E with the link you provided. CUCM and Core already have active SIP trunk and traversal zone between Core and Edge is active. Next steps I'm doing now are the search rules and transforms.

On the steps on how to configure B2B, no need for search rules for CUCM to Expressway Core? and from Core to Edge?

[Shashank Mahajan]

On CUCM you just require a SIP Trunk and SIP route pattern.

Search Rules and Transform would be required on both Expressway C and E. Its mentioned in the link that I provided earlier:

http://info.stack8.com/blog/configuring-business-to-business-sip-uri-dialling-with-expressway

[VCsupport17]

Hi Shashank,

SIP trunk is already active between CUCM and Expressway Core. Also i have configured SIP route pattern as described on the step 3 on the link provided. I make a call from endpoint registered on CUCM to Expressways for external call like for example I dialed the URI - loopback2@cisco.com I cannot see the call is hitting the Expressway Core. I check the search history on Expressway Core but there no search history for that call. 

What are needed to check?

FYI.. Traversal Zone between Core and Edge is already active.