msg wrote:
Some years ago I needed a "dirt-cheap" dialup service for occasional
testing from an outside network into our network[...]
I'm sure that there are many resellers out there,
but FWIW, this one worked. http://www.550access.com
Michael

For that application, they sound ideal.
Here's what other users have said:
http://www.google.com/search?q=cache....*.*.*.*.*.*.*