Noise due to TRAU This topic has 0 replies, 1 voice, and was last updated 11 years, 6 months ago by Ram. Viewing 1 post (of 1 total) Author Posts 15th October 2012 at 04:57 #68646 RamGuest Is it possible to identify by some means the TRAU that causes sudden noise during the call. We use Ericsson BSCs. Author Posts Viewing 1 post (of 1 total) The forum ‘Telecom Design’ is closed to new topics and replies.