Okay heres the scenario.
The site is on a 406v1 with 3 x DT30s and a phone 30.
We are replacing the 406v1 with another (complete retype as site are moving offices) and only keeping 2 DT30s and a phone 8.
The system on site is 2.1(27) and the customer is happy with the stability of this build on their setup and would like to keep it.
The replacement 406 I have is on 2.1(78) as is the Phone 8. As I am building the kit in my office I was going to downgrade them to 2.1(27) to save me having to upgrade kit when on site.
I was under the impression there was an upgrade step I needed to take before I could go from 2.1(27) to 2.1(78), and it appears my bin files dont have this upgrade bin file in them, hence I thought it would be easier to just downgrade this piece of kit (but my storage of almost all bin files from all releases is currenty not available, so I am only left with a small selection, hence asking for the .27 files) instead.
If I dont need to do any other steps between 27 and 78 then I will just upgrade the other units as well.
Forgive my ignorance on this software level I only starting using the IP office on 4.1
Thanks
Pete