What most of us do it is to buy 1 Telkom 1GB account, and use it's blended portion up, and then use it as the 10 local-only connection.
We then buy another account for the International access from a different ISP.
I can use anything from 50k to 1,5meg/s in a MMOG called Secondlife, depending on the amount I want to throttle the speed, in the Secondlife client/UI preferences.
To see the upload and download speeds of the game, on your line, simply click the two small pc icons, in the taskbar, bottom right of your screen, for your Local area connection window to pop up during the game.
For download speed, you will get an effective 10% of your line speed, so for a 384k line, 39k/s at best. Upload is again always about 10 to 15% of your download speed, about 4-5k/s at best.
39k for 1 minute is 2.34megs
39k for 1 hour is 140.4megs
39k for one 24 hour day is 3369.6megs
39k for 1 week is 23587.2megs
39k for one 31 day month is 104457.6megs
Upload bandwidth usage is about 8-10 times less, but both upload and download chews up your total bandwidth.