GSM This topic has 2 replies, 1 voice, and was last updated 20 years, 8 months ago by Sunil Kumar. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts 12th August 2002 at 13:10 #34596 Ahlam DamatiGuest Hi, I want to know why the GSM-900 bandwidth has a gap of 20 MHz between the uplink and downlink bands??? In other words, what will happen if the band extends from 890-960 for uplink and downlink without any unused frequencies??? 28th January 2003 at 07:17 #34597 Prabhakar vermaGuest we use dedicated frequency band for uplink and downlink and to seperate them we use a guard band 1st April 2003 at 02:02 #34598 Sunil KumarGuest Hi, It is 45 Mhz. Rgds Sunil Author Posts Viewing 3 posts - 1 through 3 (of 3 total) The forum ‘Telecom Design’ is closed to new topics and replies.