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re: satisfied customer

  3/20/96 11:33am ct
          I know that the new AT&T #5 SLC doesn't allow 28.8.  SWB is putting
  it everywhere in Austin and the people who have their lines "improved" this
  way are loosing the capability to access or be accessed via 28.8.  BRIs
  still work fine at 28.8.  It's a real mess and something SWB apparently was
  unaware of until they were convinced to do the testing and stop blaming the ISP.
  At 12:06 3/20/96 -0500, W. Curtiss Priest wrote:
  >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
  *** Please note the new "372" telephone numbers below.
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