Has anyone successfully registered a Polycom IP 4000 soundstation with Communication Manager
7.1.2 or any other version for that matter? I've followed the "Configuring 3rd party SIP
devices" documentation located here: https://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_0_1/ccmcfg/b09sip3p.html#wp1011004 but have yet to get this working. Basically the phone won't register.