Cisco ATA 188 - SCCP with CallManager 3.1

Now I realise that this post is not directly related to TrixBox, but after a while on the cisco irc channel, I've decided that open source communities are much more helpful and more likely to provide constructive responses.

I've got a Cisco 188 ATA, a very old Philips PABX, and am on a campus with a Cisco CallManager 3.1 VoIP network. The plan: to connect the ATA to the CallManager and use it as a trunk for the analogue PABX.

My problem is that the IT staff here (who admin the CCM server) are having trouble setting the ATA up with their services. The college has a few of their own ATAs, and according to the network admin, are running Version: v3.1.0 atasccp (Build 040305B). My device is running V3.1.0 atasccp (Build 040211B).

I've called Cisco, and to get their support it will cost me US$800. Need I say more.

Can anybody point me in the right direction (preferably a fairly precise google search string to be mindful of forum rules) to the correct image?

Kind regards,

George Brownlee