Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!mailrus!ncar!husc6!yale!Owens-Christopher
From: Owens-Christopher@cs.yale.edu (Christopher Owens)
Newsgroups: comp.dcom.modems
Subject: Binary file xfer and MNP
Message-ID: <67728@yale-celray.yale.UUCP>
Date: 27 Jul 89 02:21:36 GMT
Sender: root@yale.UUCP
Reply-To: Owens-Christopher@cs.yale.edu (Christopher Owens)
Organization: Computer Science, Yale University, New Haven, CT 06520-2158
Lines: 16

A more general question that someone may be able to explain to me.  Is
it true that doing binary file transfer using MNP error-correcting
connections implies the need for hardware (RTS/CTS) flow control? 

My reasoning: MNP link needs some kind of flow control, since the
modem-to-modem link can be arbitrarily slower than the
computer-to-modem link.  But, if doing binary file transfers, XON and
XOFF may appear in the data stream, so XON/XOFF flow control is no good.  
Therefore, one needs hardware flow control.  Is this right?  Is there any way 
around this?

thanks,

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