I've been placed in charge of replacing an older Avaya TDM PBX with a new VoIP system that will integrate with Exchange (at least in the capability to transcribe voicemail messages and deliver them to the email inbox).
I recently acquired the CCNA Voice cert, and while I have a decent idea of what I need, perhaps the most confusing part is the licensing. I really thought Cisco should have done a better job of explaining it for the CCNA Voice curriculum.
Basically, the network design will involve a SIP trunk from the ISP. I was looking at a Cisco Business Edition 3000 system, but I found out it requires a CUBE. So, that being the case, I am looking to buy either a 3825 router, or something from the 2900-series instead of the BE3000 system.
So my questions are:
I know CUCME is part of the IOS image, but does it have to be licensed to be unlocked?
I know I'll need either an AIM-CUE or NM-CUE for voicemail, how does licensing for that work?
If I buy Cisco IP phones from eBay, I assume they're unlicensed. How do I acquire a license, or will they simply work with CUCME (provided CUCME supports the phone model to begin with)?
Is the CUBE functionality built into IOS, similar to how CUCME is, or is it an addon, and how does licensing for that work?
What hardware would you recommend for a small company of 30 employees with a 10-number SIP trunk? Or does a 3825/2900-series sound ok?
How does a small company with no Cisco contracts go about purchasing the necessary licenses?
I have been researching this for about three weeks, but I keep running into incomplete and sometimes conflicting information. This will be the first voice system I've set up.