@If you need to make regular phone calls to the US it might be worth testing out one of the Betamax callback Voip services like www.voipraider.com or www.12voip.com. You should be able to make ~5 hours worth of free calls to landlines in the US per week via a normal SA Telkom phone line. This could save quite a bit of expensive bandwidth for other tasks. They let you try out the service for 1 hour free of charge. A 10 Euro payment gets you 90 days of free service.
You say I can use the regular SA phone lines to the US. These seem to be PC to PC or PC to telephone on the remote end. Is there a way to call phone to phone or do you mean I could use the PC connected at 56k to a regular phone line? Thanks.
Fred