Do the old Cisco 79X0 phones, namely 7940 and 7960 support authentication and encryption? I'm running SCCP based CUCME and without authentication/encryption everything works fine. I've tried to follow the CUCME Admininstrator guide examples but... no luck.
It seems I'm not able to install LSC on a phone. Nor do they have MIC installed. When I'm trying to install LSC from a phone's Security menu I get the following debug output on CUCME (see the attachment).