Direct Tunnel This topic has 0 replies, 1 voice, and was last updated 13 years, 6 months ago by Peter. Viewing 1 post (of 1 total) Author Posts 1st October 2010 at 09:15 #64501 PeterGuest What is the concept of Direct tunnel, anyone has the experience with NSC packet core (SGSN and GGSN) and whats the benefits from this feature? Author Posts Viewing 1 post (of 1 total) The forum ‘Telecom Design’ is closed to new topics and replies.