telecom@ucbvax.ARPA (11/28/84)
From: Jon Solomon (the Moderator) <Telecom-Request@BBNCCA> TELECOM Digest Wed, 28 Nov 84 14:21:14 EST Volume 4 : Issue 128 Today's Topics: T-carrier specs. T1, T2, etc data rates ---------------------------------------------------------------------- Date: Mon, 26 Nov 84 9:26:04 EST From: Jim Berets <jberets@bbn-vax> Subject: T-carrier specs. To: telecom@bbncca.arpa Cc: jberets@bbn-vax.arpa From "Introduction to Communication Systems" by Stremler: Specifications for the T-carrier TDM/PCM Telephony System System Rate MUX Voice Medium Rptr. Max. Sys. (Mbps) Chans. spacing sys. error (miles) length rate (miles) ------------------------------------------------------------- T1 1.544 T1 24 Wire 1 50 1e-6 pair T2 6.312 4(T1) 96 Coax 2.5 500 1e-7 T3 44.736 7(T2) 672 Coax not used for xmission T4 274.176 6(T3) 4032 Coax 1 500 1e-6 T5 560.160 2(T4) 8064 Coax 1 500 4e-7 WT4 18500.0 58(T4) 233000 Wave- 25 4000 1e-8 guide There is also T1C which is 2(T1). Jim ------------------------------ From: ihnp4!ariel!jmn@Berkeley Date: 27 Nov 84 11:16:06 CST (Tue) To: ihnp4!ucbvax!telecom@Berkeley Subject: T1, T2, etc data rates [] The data rates of the digital transmission facilities in the U. S. A. are; Bit Rate No. of 64,000bps voice channels T1 1.544Mbps 24 T1C 3.xxx 48 T2 6.312 96 T3 44.736 672 T4 274.176 4032 In Japan; level 1 1.544Mbps 24 level 2 6.312 96 level 3 32.064 480 level 4 97.728 1440 level 5 400.352 5760 In CEPT (Europe); level 1 2.048 Mbps 30 level 2 8.446 120 level 3 34.368 480 level 4 139.264 1920 level 5 560.xxx 7680 John M. Nervik ------------------------------ End of TELECOM Digest ******************************