Ref: 13390017
Title: Binary Transfer Via Comm Server Running TCP or XNS
Date: 12/27/90

Copyright 3Com Corporation, 1991.  All rights reserved.

In some cases, it is necessary to transfer data to a host in binary mode,
via a Comm Server's terminal port.  Binary transfer to a host causes the
server to provide an eight-bit data path with the host, where the data
packet retains the parity bit.

(In the default mode--with binary transfer off--the server transmits
seven-bit ASCII data while the session is in progress and pads the <CR>
character with a <NUL> or <LF> character, depending on the setting of the
NetAScii parameter.)

The binary transfer parameters are used only by the terminal (active)
port, and have no effect on a host (passive) port.  Here are the required
settings for binary transfer over TCP and XNS:


TCP

For binary data transfer under TCP, set the following option in the default
parameter (dp) section:

   XmitBinary=on

Note:  The XmitBinary parameter simply turns the binary transmission request
to the host on or off; the host still may refuse the request at any time.
The current value of this parameter does not indicate the status of the
session.  Also, because the transmit and receive channels are independent,
the session does not guarantee that both channels have the same options
simultaneously.


XNS

For binary data transfer under XNS, make sure parameters are set as follows:

   set bra=(edtm)
   set ecmc=disable
   set fcf=none
   set fct=none

