If I can but in. But 56 modems are 56 kbps/8 = KB/s minus overhead.
Your connection is 56kbps total. That means that upload & download comes out of that total of 7 or less KB/s. I was a dial up user up until 5 months ago & have use LW for a few years.
That's compaired to adsl where you get a separate speed for both upload & downld. eg: mine at present is 264/64 which is about 25-7 KB/s after overheads have been subtracted & about dial up speed for uploads.
The rest I'll leave up to Fabion to answer for you. ciaou