[pptp-server] Question regarding the speed setting in pptpd.conf

[Clint Fast]

What effect does the speed setting have in the pptpd.conf? 

What is the maximum setting you can enter here, and what is more
realistic?

Any ideas?

I'm currently set to 115200 for the speed setting but am quite curious
as to which is better.  Obviously, for dialup or something you want a
slower speed setting, but what about higher connections, such as
DSL/Cablemodem lines, etc.

Thanks.

--Clint.