Need telephone access in my wireless shop

You need some VOIP boxes that'll take POTS and put it on your LAN and then take it off you LAN and turn it back into POTS. I'm having a brain freeze on the vendor I've seen, but it'll come to me...

POTS to VoIP adapter.

of vendors on eBay for $40 to $60 each.

However, if there's a common AC power line going between the garage and the house, a poweline phone contraption might be cheaper and better.

CATV and satellite vendors use these and one can often find them for next to nothing.

I tried this 2 or 3 years ago, every time it rained I lost my telephone, then would have to reset at the house and reset in the shop. Then eventually the telephone setup quit working in the shop. I think it still works in a shed about 100 ft. from the house. Very fussy as to what equipment could be plugged in close to it's outlet, but putting it on it's own circuit didn't solve anything either.

I don't have a huge amount of experience running Phonex adapters over long power lines. The FAQ claims 100ft:

have one pair setup with about 100ft of AC power line. No problems. I even use it with a dialup modem but only get about 14Kbit/sec.

Another possibility is to use a 900MHz (not 2.4GHz) cordless phone and a pair of external antennas. There are high power phones that have tremendous range:

might work. However, methinks just attaching a pair of directional 900MHz antennas to each end of a common 900MHz cordless phone link will be good enough.

Groan. That should be 1000ft. (Yacking on the phone while typing).