Originally Posted by jmral23
I live in California and I am embarassed that Arnold os our Gov. The google response didn't answer my Q. So I called my favorite CCIE.
T1 stands for Trunk-level 1.
So there we go. I know and now you know as well.
Not correct. CCIE is like GIGO (garbage in garbage out).
The T in T-1 stands for "Terrestrial".
Bell used to name carrier lines a,b,c...hijk, skipped a few, s,u,v...blah blah.
They created trunks that carried multiple lines, true. but the T was not designated for trunk because bundling a,b,c q,r, etc. was also done in a trunk.
In 1961 Telstar was put up as the first full SATCOM unit. To DIFFERENTIATE between ground based and space based comms they reverted all ground lines to designated T-1,2,3, etc. (although T-2s are not in practical DS0 (64k) bundles so they skipped odd and used empirical numbers to bundle efficiently until fiber came along) whereby fiber is designated OC for optical carrier which is obviously ground based.