Ip phone CTL query

[Gowrishankar NC]

Hi Guys,

If I migrate the phones from cucm 8.6 with cluster security mode 0 to cucm 10.5 with cluster security mode 0 will it cause any issues with ip phone registration?? Like i need to delete CTL/ITL files from phones.

Regards,

Gowrishankar

[Deepak Rawat]

CTI will not be a problem since both the clusters are running in non-secure mode but you will definitely need to take care of ITL. Refer below post that talks about this and the steps involved in the same:

https://supportforums.cisco.com/document/60716/migrating-ip-phones-between-clusters-cucm-8-and-itl-files

Regards

Deepak

[Gowrishankar NC]

Hi Deepak,

Thanks for the update and link.

Regards,

Gowrishankar

[Jaime Valencia]

You don't need to worry about CTL, but you do need to worry about ITL as that's enabled by default on 8.x+