im working on a migration from cme 8 to cucm 12 , the problem i tested a phone which was previously on cme and got it on cucm 12 but now the customer needs the phone back on cme , after i factory reset the phone it is becoming stuck at upgrading , i think the version the 7911 got on cucm 12 cant go back to cme 8 which is as below: cucm 12:SCCP11.9-4-2SR3-1S CME 8:SCCP11.8-5-3S    is there a middle version i should roll back the 7911 on cucm 12 before i roll it back to the cme? how can i register the phone back into the cme? ... View more

i only use my unity for voice mail and AA and have 52 users with voice mail, after syncing my licenses im getting a shortage as shown in the attached picture , does that mean that "Unity Connection Basic Messaging User Licenses" is used for voice mail? and i need further more 17 licenses to cover my usage need? ... View more

i have cucm 11.5 and uccx 11 i need to configure silent monitoring for supervisor to hear the agents calls , does silent monitoring require changes in the call center script?  also can someone please link me how to configure silent monitoring on uccx? i only found the steps on cucm in the below link https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_5_2/ccmfeat/CUCM_BK_C3A84B33_00_cucm-feature-configuration-guide_1052/CUCM_BK_C3A84B33_00_cucm-feature-configuration-guide_chapter_01001.html ... View more