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re: satisfied customer
I have appreciated the various responses to what we call
digital vs. analog.
The information about the digitization of inter-office voice
connections was most informative.
In summary, I back away from referring to digital transmissions
as "analog" for, although they are "technically" analog, it has
been pointed out that that would label every transmission analog
as there could be nothing referred to as digital (there is always
a finite "rise time" in even the digital computer -- limiting the
processing speed, or CPU clock).
Nonetheless, I gather there is agreement that 28.8 Kbps modems
are as "digital" as ISDN "modems."
There was an argument that ISDN traffic moved by a digital network
between COs while voice traveled by an analog route -- but given
the statements that almost all inter-office voice is handled by
the "digital network", this distinction, apparently, does not hold.
So when we compare 28.8 to ISDN we really are talking about comparing an
unconditioned local line with a conditioned local line with repeaters
(if necessary). Once at the CO both data travel digitally.
Does anyone know if there are inherent advantages, efficiencies in
using ISDN vis a vis a 28.8 modem where the connection is made
at the CO?
W. Curtiss Priest, Director, CITS
Center for Information, Technology & Society
466 Pleasant St., Melrose, MA 02176
Voice: 617-662-4044 BMSLIB@MITVMA.MIT.EDU
Fax: 617-662-6882 WWW: gopher://gopher.eff.org:70/11/Groups/CITS