Line booster?

There are amplifiers for long loops

but if it's a digital you may be out of luck

Take care, Rich

God bless the USA

So, after traveling via crummy old low grade telephone cable for anything from 1 to 5 miles from the telco to your house, that last 100 feet is killing it????

You've got a cabling problem, which if fixed will allow it to work just fine without any for of loop extender.

Check all of those "several junctions".

What Floyd said.... A friend is 41,500 feet from his CO. He managed to kill his phone with a bad 25 ft cable. [The modular jack on the end was corroded and shorting out...]

Now see when I read extension in the OP I thought single line extension on a key or PBX system. Those have very finite distances that are far less than several miles. It also depends on how many devices he has on that extension.

Take care, Rich

God bless the USA

You are right.. a modem worked but a cheap telephone didn't.. but the cheap phone had worked without the last extension..

I'm wondering tho.. I'm going bats trying to find those self-piercing connectors you snap onto a phone wire and they add an outler right on the wire. I got them for AC power and I've seen them for phone, but I can't locate any of them online!