C/I is >= 9dB in GSM why???? This topic has 1 reply, 1 voice, and was last updated 11 years, 6 months ago by pix. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 6th June 2011 at 05:28 #66538 Ram Swaroop PandeyGuest In GSM C/I value thersold is set to greater than 9 dB in Hopping senario. why is so, why we cant take some other value eg 8, 7. in this case also carrier is more than interfreance 6th June 2011 at 08:30 #66539 pixGuest hi, because when the C/I is less than 9dB, the BER is too high and the voice quality is degraded. C/I = 9dB means that RxQual=4 Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Telecom Design’ is closed to new topics and replies.