TG Numbering in Ericsson This topic has 2 replies, 1 voice, and was last updated 6 years, 8 months ago by hi. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts 28th November 2004 at 15:12 #40298 SOUDGuest I want to understand according to what numbering the tg in Ericsson network such as tg20,tg120,tg220 and this tg’s fallow up RBLT20 13th April 2018 at 20:50 #40299 bicharnelGuest what is a TG in a GSM system? 25th April 2018 at 05:28 #40300 hiGuest hi, TG stands for trunk group in ericsson GSM BSC, an rblt is an e1 to connect a gsm bts to bsc. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) The forum ‘Telecom Design’ is closed to new topics and replies.