From owner-freebsd-questions  Mon Dec  6 23:24:38 1999
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From: Brian Skrab <bgs@geeks.valleyip.net>
Message-Id: <199912070724.XAA70426@geeks.valleyip.net>
Subject: Multi-link PPP w/ 2 ISDN TAs ???
To: freebsd-questions@freebsd.org
Date: Mon, 6 Dec 1999 23:24:26 -0800 (PST)
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Hello,

	I have just received an interesting question from one of my clients
	regarding the feasibility of "bonding" two ISDN BRI lines to create
	a 265k channel.  At first thought, the idea sounds rather silly, but
	it turns out that they are located in a somewhat remote part of town
	as far as the telephone company is concerned.  So, the only
	telecommunications circuits they can use beyond POTS lines are ISDN
	and T1.  Since a T1 line is quite out of their budget, they are
	looking to try putting two ISDN lines together to expand their
	bandwidth.  So, I began to think...

	I've setup a FreeBSD box with an external ISDN TA and configured PPP
	to talk to it just like an external analog modem.  I've seen a
	FreeBSD box configured to use 2+ analog modems to add bandwidth to
	create a slightly larger "channel" for Internet traffic.  So, why
	couldn't one simply hang two ISDN terminal adapters off of a pair of
	serial ports and configure PPP multi-link the two lines to create a
	256k Internet connection?  Does my reasoning sound right?  Has
	anyone tried this (with any success)?

	Any suggestions, opinions, and/or recommendations will be very much
	appreciated.

	Thank you,

	~brian skrab
	 bgs@geeks.valleyip.net


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