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IP PHONE REGISTERING ON CUCM VIA ORACLE SBC ISSUE

wabou0001
Level 1
Level 1

Hello Team,

Please need help for Access-Backbone scenario.

I have an issue to register my SIP Phone on Cisco CUCM via SBC.

My design:  SIP PHONE <---------> SBC <----------> CUCM

SIP phone can register when it directly connected to CUCM. But when I plug it before SBC it cannot register on Cisco CUCM.

I create security profile on CUCM with Digest Authentication and match it to SIP phone account but issue still remains.

I attached pcap files.

Thanks.

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