Back to Graybar and get a Porta systems line protector, if you're not going to use any ringing current get the low rated, 30volt (I think). These things are quick clamp and will protect your telephone equipment. As far as numbers of phones on a 1a, don't know as I've every heard of a limit. Biggest I ever worked on had around 60 phones and everything worked fine. Now that's been awhile back (no comments), so can't remember if they had a beefed up power supply or not, I doubt it.
