Sharing a Dial Up for Internet

Hello everyone

Here is my issue. I have a small temporary office that I need to set up with 4 PC’s. I need them to have internet access for email only. Is there a way to get a phone line in the office and share a dial up to AOL or another ISP. Ordo I need four 56K modems and 4 lines. I would like to do this as cheaply as possible. Aren’t there products that allow you to share a dial up connection?

any help would be great!