/mcp0 Unknown 1 CallManager service is not available to process request; verify that the CallManager service is active. Check the Cisco Unified Serviceability Control Center section in Cisco Unified CM Administration (Tools > Control Center - Feature Services) 2 Device has unregistered with Cisco Unified Communications Manager 3 Device failed to rehome to Cisco Unified Communications Manager; verify that the device is registered 4 Device is removed from the Unified CM database 5 Application controlling the device has closed the connection 6 Route Point already registered by another application 7 CTI Port already registered by another application 8 CTI Port/Route Point already registered with dyamic port media termination 9 Enabling softkey failed for device; verify that the device is registered 10 Multiple applications have registered the device with media capability that do not match 11 This device is already controlled by another application 5/24/26, 3:34 AM System Error Messages for Cisco Unified Communications Manager 15 - Cisco https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/err_msgs/15_x/ccmalarms15.html 16/343