IOS Versioning

Unanswered Question
Feb 22nd, 2008


I'm extremely confused with Cisco IOS versioning system.

We are currently running:

Cisco IOS Software, 3800 Software (C3845-SPSERVICESK9-M), Version 12.4(11)XJ4, RELEASE SOFTWARE (fc2)

on our CallManager Express router.

Any tip to understand and upgrade our system ?

What's the latest version I can use right now ?

I do know how to upgrade routers, I'm only confused about versioning.

I have this problem too.
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