Reply To: Calculating E1s and Bandwidth 12th September 2005 at 13:16 #41195 joodGuest please as i know, one GSM TRX = 2TS on A-bis E1, so we use the margin about 0.3 or 0.5, thus 1 TRX = 2.5 E1 ts. is it for signaling or what. thanks in advance.