call drop This topic has 1 reply, 1 voice, and was last updated 6 years, 10 months ago by Wallis Dudhnath. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 26th November 2016 at 18:54 #69962 nagendra kumarGuest call drop & call flow ,hopping frquency 28th November 2016 at 10:07 #69963 Wallis DudhnathGuest Hi Nagendra, please let me know what issues you are experiencing. Several issues (handovers, insufficient capacity, lack of Radio signalling, resources, etc..) can lead to call dropping. The Call Flows are well established with 3GPP (includes GSM). To reduce on interference for GSM, Frequency Hopping can be ued. For 3G, Frequency Hopping is part of WCDMA. VBR/ Wallis Dudhnath Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Telecom Design’ is closed to new topics and replies.