Terminal Server or Citrix

Hi,

I evaluate some solution about remote connexion.
We have some offices situated in the other part of the world with a 56k connexion.
Here at the office we have a 4MB bandwith (it's not a problem).
I want to connect the remote user to use SQL, Navision and other applications trought the 56k line.

Citrix uses low bandwidth than Terminal Server.
Wich is the best way to connect the uisers ? Citrix or TS ?
the 56k connexion works well ? (Slowly ok but it work ? No timeout ?)

Citrix announce : It works with slow bandwitdh like 20k by session.
Terminal server (no announce on the website) : It seems work with 40k by session ?
It's true ?

Thanks for your responses ...
Greg