Yes. PCD 11.5 does support Unity Connection upgrades http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/rel_notes/PCD/11_0_1/CUCM_BK_P10B55E7_00_pcd-rns-1151/CUCM_BK_P10B55E7_00_pcd-rns-1151_chapter_01.html

hi Jmlet me check and get back to you on how you enable NFS in ESXi. PCD uses NFS to transfer the ISO to boot the VMs.RegardsRaees Shaikh

Hi Aman Thanks for your feedback. Please post your queries in the below blog for a faster response https://supportforums.cisco.com/blog/12108306/cisco-unified-communication-manager-cucm-10x Thanks & RegardsRaees Shaikh 

Hi AnishIn that case i would suggest you to perform the upgrade in maintenance window. As described before, once the server upgrade is successful to CUCM ver 10.5, you need to take a backup, create a Vm using the CUCM 10.5 OVA & perform restore. You ...

Hi Even if you do the migration with IP Address change, the private & public keys will be copied to the new server (CUCM 10.x) & therefore you shouldn't run into any certificate issues & the phones will register seamlessly. I have already tested this...