SD Blocking This topic has 0 replies, 1 voice, and was last updated 13 years ago by YOMAR. Viewing 1 post (of 1 total) Author Posts 6th April 2011 at 15:24 #66128 YOMARGuest why is GOS set for SD far lower than that of TCH? Author Posts Viewing 1 post (of 1 total) The forum ‘Telecom Design’ is closed to new topics and replies.