Dear AllI need to know which types of non Cisco Phone Models that support to be added on CUCM 6.1 as a SIP PhonesThanks

Dear AllI have a CRS 4.0(5) with CM 4.2(3)I am facing a problem with work state button on Cisco Agent desktop.I cannot use this button it is grayand agents go on work state only by automatic wrapup time after ending a callSO if anyone have any idea o...