Connect CUCM directly to SIP ITSP without CUBE

[Xian Li]

Hi expert,

Is it possible to connect CUCM directly to SIP ITSP without CUBE? The ITSP provided the SIP outbound proxy address, SIP realm, SIP username and password.

Thank you

[Vaijanath Sonvane]

Yes, it is possible to create SIP Trunk directly between CMCM and ITSP but it is not recommended. Cisco strongly recommends deploying CUBE Router for SIP Trunk connectivity with ITSP. Please check these posts for more information:

https://ciscomarketing.jiveon.com/docs/DOC-9879 

https://community.cisco.com/t5/ip-telephony-and-phones/cucm-8-x-sip-to-itsp-without-router/td-p/1794024 

https://community.cisco.com/t5/ip-telephony-and-phones/sip-trunk-without-cube/td-p/2278653 

[TONY SMITH · Accepted solution]

If I recall correctly you can't configure an authenticated trunk directly on CUCM.

[Xian Li]

Thank you