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TCP-group 1995

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Flag Frames

To: TCP-Group@ucsd.edu
Subject: Flag Frames
From: mikebw@bilow.bilow.uu.ids.net (Mike Bilow)
Date: Tue, 03 Jan 95 20:54:00 -0000
Reply-to: mikebw@bilow.bilow.uu.ids.net


On 95 Jan 03 at 12:32, Fred Sanford wrote:

 FS> Does anyone out there know if the statement in the NB-96 
 FS> modem manual is correct about not all tncs sending flag 
 FS> frames is true ???

Some TNCs send square wave for sync instead of HDLC flags ahead of a frame. 
The idea is to allow the receiver to recover the data stream and acquire phase
lock more quickly.  Sometimes this works, sometimes it messes things up.  All
TNCs send at least one HDLC flag, even if they do not use flags for sync idle.
 
-- Mike

Follow-Ups:
- Re: Flag Frames
  - From: "Barry McLarnon" <barry@skat.dgbt.doc.ca>
- Re: Flag Frames
  - From: Phil Karn <karn@qualcomm.com>

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