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.