Re: [ethereal-dev] LAPB/X.25 patch

[Guy Harris <gharris@xxxxxxxxxxxx>]

> Perhaps it's set by one of the Set Mumble Mumble Mode Extended commands?
> I.e., perhaps the connection starts off in basic mode, and one side
> sends something like Set Asynchronous Balanced Mode Extended to tell the
> other side that they should both run modulo 128?

...and

	http://www.blackbox.nl/techweb/protocol/x25.htm

says:

	The CONTROL field is initialized with a Set Asynchronous
	Balanced Mode (SABM).  There is also an extended operation
	(SABME) that provides a modulo-128 frame window.  LAPB is a
	full-duplex mode of operation.