|Back in the day I used to run a BBS. Some of you oldtimers will remember what that is. For those of you who don't, BBS stands for "Bulletin Board System"|
Think of it as a prehistoric internet connection. There were forums to talk publicly in, private messaging, files available for download, games, etc.
I had a modem in my BBS computer and 2 phone lines in my home. One line was my telephone and the other I used strictly for my BBS. People connected by calling from their PC with their modem to mine.
I mentioned the above because it's this type of connection you're talking about.....modem to modem. It's simple enough to establish a connection this way. If you just want a straight modem to modem connection from work to home, all you need is a modem at both ends and telephone lines at both ends.
I will say though, if you can afford it, it might be worth your while to invest in two wireless antenna's and if you have direct line-of-sight between your shop and home, you could easily have a wireless connection between the two and even use your home highspeed to surf from work.
We've tested out some products from EnGenius that worked quite well and may be powerful enough to setup your own wireless point-to-point shot. It's worth checking out if you have some extra $$$. Heck, if you're buying it for your shop, you could claim it as a business expense right. :)