DT1 and DT2 This topic has 0 replies, 1 voice, and was last updated 19 years, 2 months ago by Nitin. Viewing 1 post (of 1 total) Author Posts 28th November 2005 at 10:57 #43187 NitinGuest what is difference between DT1 and DT2 message in GSM.. Regards Nitin Author Posts Viewing 1 post (of 1 total) The forum ‘Telecom Design’ is closed to new topics and replies.