I'm not trying to be funny here, but you do need to do some reading. It will not help you to be merely spoon-fed with the solutions to fix your connectivity issues - that's the kind of thing you get, if you're willing to pay for the service (which this forum does not officially offer, regarding your problem). I doubt also that any forum member will help - such generosity you will only find in purely altruistic forums, with a common objective to which members are absolutely committed. This forum is, however, dedicated to service issues regarding Telkom's ADSL offering - granted, related matters are indeed discussed, but training is, in my opinion, not one of them. Please note that this is not a flame, but is a genuine attempt to get you properly focussed - as evidentiary support for this, here are two links that will give you a steer in the right direction:
http://www.informit.com/isapi/product_id~%7BB1B918E6-EB00-443C-94CB-726540655987%7D/element_id~%7B01C0B257-52A7-42A9-982C-55BD3548EFD1%7D/st~%7BB4A53C57-EE2E-4A5C-B77B-40730C78B24A%7D/session_id~%7B61F07616-53B5-4EC0-AC40-1710445AF160%7D/content/articlex.asp
http://compnetworking.about.com/cs/basicnetworking/
Trust this helps...