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Cell Relay Retreat>List Archive>month:1997-Nov> msg00121



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Re: Interworking between frame relay and ATM networks

  • From: ronaldd@ihgp3.ih.lucent.com (-Davis,R.H.)
  • Date: 17 Nov 1997 17:34:42 GMT

In article <ays-0811971807460001@korea-154.ppp.hooked.net>,
Alan Y. Schaevitz <ays@hooked.net> wrote:
>
>Since there are no traffic control and congestion control mechanisms
>specified in frame relay, there can be no standardized interworking of
>such.  All such traffic/congestion mechanisms in frame relay are
>proprietary.  The rudimentary utilization of FECN, BECN and DE in frame
>relay do have a translation to ATM's EFCI and CPI bits but this can hardly
>be labeled traffic or congestion control mechanisms.  THe mapping between
>these bits can be found in the frame relay forum specifications FRF.5
>(FR/ATM Network Interworking) and FRF.8 (FR/ATM Service Interworking). 
>THese can be found on the Frame Relay Forums WEB page (www.frforum.com).
>

there is a service specific convergence sublayer defined for frame
relay service over atm (using aal 5).  if i recall correctly, it
may be found in itu recommendation i.365.1.

-- 
  __  ______  __  / __/ |       lucent technologies, naperville il, usa
_/ (_(_) / (_(_/_/_(_/  .       ronald.h.davis@lucent.com
"in every loss is the opportunity for future gain."