@volcano619
I do not think that is what is meant by contention ratio. What you are doing is converting bits into bytes.256kbps to 32kBps.
Actually Each channel is allotted particular traffic....or you can say users who can access it and it depends on frequency when you are on BB's....
When you are on a connection w.r.t. fiber.....then connection is distributed in terms of wavelength.....there is another access technique for GSM,where Time is a main concern.....
This distribution is multiples of 2,4,6,8,16,32 in terms of BB connections...irrespective of your speeds... 🙂
When fiber is concerned....there is no multiples.....as far as i know...the standard used now is 1:1...i.e. like 10% of your total bandwidth(WHICH IS NOTHING BUT YOUR DOWNLOAD SPEED)....your so called SPEED mentioned by your ISP
CORRECT ME IF I'M WRONG... 🙂