17 Jan
2017
17 Jan
'17
8:21 p.m.
Doug McIlroy <doug(a)cs.dartmouth.edu> wrote:
The highest levels of AT&T were happy to carry
digital data, but
did not see digital as significant business. Even though digital T1
was the backbone of long-distance transmission, it was IBM, not
AT&T, that offered direct digital interfaces to T1 in the 60s.
Was T1 a "digital" line interface, or was this rather a 24x3.1 kHz channel?
How was the 64 ??? Kbit/s interface to the first IMPs implemented?
Wasn't it AT&T that provided the lines for the first IMPs?
I was always wondering how they could provide such a "high speed" line in the
1960s.
I hope somebody knows this....
Jörg
--
EMail:joerg@schily.net (home) Jörg Schilling D-13353 Berlin
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