Abis E1 This topic has 1 reply, 1 voice, and was last updated 16 years, 9 months ago by pix. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 27th December 2007 at 05:46 #50188 NKGuest Hi! ALL, Thank you in advance. I want to know that Abis and other interfaces(A AND Asub) use a pair of E1 for UL and DL information transmission ot duplexer is used. Thank you. Reagards, NK 28th December 2007 at 08:16 #50189 pixGuest E1 is a pair of coaxial cables, one for UL, one for DL. Don’t mistake : E1 is a description of a transmission link (physical, logical, protocol, etc.). It’s not just a cable. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Telecom Design’ is closed to new topics and replies.