Thanks for the information. Even though I'm paid up until next year with Ooma, for that price I may just buy one and test it out in the next few months. I have a 'Line 2' position on my modified 1A2 key system ready to go.

Yes re: telco lines on a 5ESS, where I work now we have a 5ESS which will be decommissioned at some point. It'll be a long process, but I recommended they keep at least some of it for faxes, alarm lines etc. as I've had the same experience with ATAs.