telecom@ucbvax.ARPA (10/06/84)
From: Jon Solomon (the Moderator) <Telecom-Request@MIT-MC>
TELECOM Digest Saturday, 6 Oct 1984 Volume 4 : Issue 96
Today's Topics:
Re: TELECOM Digest V4 #94
AT&T and DNHR
net.followup followup article to the one posted in net.general
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From: ihnp4!ihldt!jhh@Berkeley
Date: 4 Oct 84 17:07:47 CDT (Thu)
Subject: Re: TELECOM Digest V4 #94
Oops, the correct rate for a 56Kbps Accunet port is $1065 per port,
not $1865. Who said slashes through zeros made things clearer?
In the my face is red department, John Haller
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Date: 5 Oct 84 11:14:49 EDT
From: dca-pgs @ DDN1.ARPA
Subject: AT&T and DNHR
Data Communications, Sept 84.
"AT&T Launches NonHierarchical Network."
"Ever so quietly, AT&T Comms is slipping its dynamic non-hierarchical
routing (DNHR) scheme into place. Sixteen cities have been switched
over to the new routing procedure, and AT&T expects to have made the
full transition to nonhierarchical switching by 1987.
. . . . . .
...the 'smart' offices avoid busy circuits by evaluating the
originating nyumber and destination, as well as time-of-day. AT&T
insiders say the large amount of extra line capacity gained from the
efficient DNHR networrk carries tremendous implications for services
AT&T will be able to offer its customers in the future...
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(quote was from p. 15)
Does anybody have a good guess on when AT&T will be coming out with
their Software Defined Network (SDN) (virtual private network)
offering?
Have a nice weekend.
Best,
-Pat Sullivan
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Date: Fri, 5 Oct 84 13:44:59 EDT
From: Jon Solomon <jsol@bbncca.ARPA>
Subject: net.followup followup article to the one posted in
Subject: net.general
Anything is possible. I have no inside information and could not
discuss it if I did. However, you are misinformed on a couple of
factual points. First, telephone central offices (plain or digital
fancy) do not look for or detect data signals on customer lines. It
would be very expensive to modify them to do so - even the new
electronic and/or digital variety. If they did, you could always make
voice calls and then switch in the modem after a delay (which is in
fact what you do now, except you switch in the modem as fast as
possible). What the telcos probably want to do is introduce special
data lines (perhaps digital) as an improved service to their
customers. Then they might lobby to force data users to stop using
pots lines (Plain Old Telephone Service). I forgot what the second
point was, if any. Dick Grantges hound!rfg
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End of TELECOM Digest
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