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From: smir@pbhya.PacBell.COM (Sonu Mirchandani)
Newsgroups: comp.dcom.lans,comp.protocols.tcp-ip,comp.sys.proteon,comp.dcom.modems,pb.general
Subject: Direct T1 interface
Keywords: DSX-1, Router, T1, interface
Message-ID: <24613@pbhya.PacBell.COM>
Date: 16 Mar 89 17:21:18 GMT
Distribution: usa
Organization: Pacific * Bell, San Ramon, CA
Lines: 29



  The following is a request from a colleague, and I am posting this
  on behalf of him. In responding to your questions, if any, I will
  try to answer as soon as I can. If you wish to send replies directly
  to me, feel free to do so. Either way, I will summarize, if there's
  enough interest.  Appreciate your time and thanks for the input.
  Sorry if this has already been discussed.


          Are there routers available that provide a T-1 rate serial
          interface that meets the DSX-1 standards?  The DSX-1 is a
          signal that is T-1 framed 1.544mbps and connects directly to
          T-1 equipment, such as a microwave link or T-1 switch
          located close to the router (i.e. within 600 feet).  This
          would elminate the need to use the V.35 interface at the
          router along with an external T-1 DSU/CSU (which costs about
          $3k).  Some of the functions provided by the DSU/CSU to
          drive the long T-1 line are not needed for these short
          connections.  If this DSX-1 serial interface is available on
          a particular box, how would the price of this interface
          board compare with the straight V.35 interface?


 Sonu Mirchandani
 smir@pacbell.com
 (415) 823-8908

 pacific bell, 2600 camino ramon, 2 south 300, san ramon, ca. 94583