CER upgrade from 9.0 to 10.5(x)

[shree bhagwan parashar]

Upgrading Emergency Responder

• Before you upgrade to the latest version of Emergency Responder, you must ensure that it is compatible with your existing version of Unified CM.
• You must upgrade Emergency Responder before you upgrade Unified CM. Only after you have installed the new version of Emergency Responder can you then upgrade Unified CM.
• After you have upgraded both Emergency Responder and Unified CM, you must then update the Unified CM Version on Emergency Responder.

Cisco document is confusing me on upgrade.

Do we need to upgrade CER first then CUCM or it does not matter.

Rdgs,

Shree

[csaurabh]

Yes Cisco Emergency Responder must be upgraded before upgrading UCM. CER 10.5 will remain compatible with UCM 10.5 and UCM 9.0 both. 

Cisco Emergency Responder talks to UCM via JTAPI. Once UCM is upgraded , Administrator should update configured  UCM on Cisco ER Admin Utility to 10.5.