high drops on 900 ( common BCCH cells) This topic has 1 reply, 1 voice, and was last updated 7 years, 3 months ago by Wallis Dudhnath. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 15th June 2016 at 09:53 #69917 viper2014Guest Hi , We are facing issue of high call setups and drops on 900 layers on common BCCH wall mount sites where physical changes are not possible due to access issue. System :Nokia NBL changed to 5 LER changed to -100, LAR changed to -90 but still high call attempts and drops on 900 while 1800 carrying max traffic with few drops but still 900 call drops high. Pix waiting for your view on this. 20th June 2016 at 08:43 #69918 Wallis DudhnathGuest Several areas need to be reviewed. See below:- -Hardware failure -Transmission problem -Version upgrade -Parameter setting -Coverage problem -Antenna system problem -Imbalance between uplink and downlink Check with another site if the parameters are the same and if the other site is experiencing the same set of issues. Check with Nokia if this is a known fault. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Telecom Design’ is closed to new topics and replies.