You say it connects at 11500. The highest a modem can connect is 53k-56k. 11500 is probably the serial port speed. I understand kppp may be reporting that for the speed (which is good since that is what the serial port should be at).
Then you say when you try and go to linuxquestions.org it doesnt open,
then you say its going at .5 kb/s.
Yeah, that site is down. Try the speed test here
It seems like you have a wrong init string. What modem do you have and what string did you use/ is kppp using? Internal or External modem? serial, usb, pci, isa?