Is the 7931 supported with attendant console?
It's getting pretty frosty up here, it looks like a long cold winter ahead. This was the latest doc that I could find thinking the same way you are here :) The 7931 has been out just a short time now (maybe 6 months) first with only the CME and now with the newest CCM 6.x train as well. The 7931 is a re-branded Linksys phone and does have some limitations. It is really meant for the Retail industry with the "Key System" design. The max calls is one per line and I beleive limited display funtionality.
My guess is that it won't be supported for use with AC setups, you are probably far better of with a 7961 and 7914.
Hope this helps my friend!