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Cell Relay Retreat>List Archive>month:1997-Aug> msg00196



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Re: ATM vs. SONET

  • From: marcr@adc.com (Marc Randolph)
  • Date: 26 Aug 1997 13:31:15 GMT

In article <ays-1408971748050001@pm3-ppp3.well.com>,
Alan Y. Schaevitz <ays@hooked.net> wrote:
[...]
>
>SONET's version of TDM).  One VT could carry ATM traffic while another
>could carry, say, voice or video.  However, since ATM can carry voice and
>video, what would be the point of segregating the SONET capacity?  TDM is
>not really an efficient utilization of capacity.  That's why virtual
>circuits are so popular.

   The point of segregating the SONET capacity is legacy traffic.
People are wanting to go to ATM, but for whatever reason, can't
or won't give up their TDM (especially the LEC's and such).  ATM
over SONET allows them to ease into ATM without losing their 
existing TDM customers or equipment investments.

   Marc