On CUCM 6.1.3 and 7.0.2 Call Forward No Answer/Unregistered does not work with Nokia S60 devices (using cmterm-nokia_s60_2.0-sccp.cop.sgn). Calls to unregistered Nokia Call Connect clients get a busy tone. Has anoyne else seen this problem? If so, have you opened a TAC service request and did you get any solution/feedback from TAC?
PS: With CUCM 7.0.2 the Nokia clients can still be configured as 7970 for a workaround. I would prefer a working solution with the Nokia S60 device type.