Upgrade cucm6.1.1 to cucm8.6

[xiaotong xiaotong]

Hi,

I want to upgrade my callmanager version, because the current version can't support the new IP phone 6921, please tell me how to purchase the corresponding license and relevant steps, thank you.

[skilambi]

If you are a customer work with your local Cisco partner. If you are a partner the ordering guides are here that step you through the SKU

http://www.cisco.com/web/partners/sell/technology/ipc/uc_tech_readiness.html#~7

Thanks

Srini