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
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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
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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
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End of TELECOM Digest
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