From owner-freebsd-isp  Mon Dec 28 11:47:21 1998
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Date: Mon, 28 Dec 1998 14:49:01 -0500
To: Alan Batie <batie@rdrop.com>
From: Dennis <dennis@etinc.com>
Subject: Re: ATM WAN interface
Cc: isp@FreeBSD.ORG
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At 09:56 AM 12/28/98 -0800, you wrote:
>A quick search through the archives indicates that the only ATM support
>in FreeBSD is for 25 and 155 Mbps LAN interface cards.  I thought I'd
>ask live once before giving up on the idea of a T1 or T3 interface, or
>do you just use a standard T1/T3 sync card and the rest is software?

There is no such thing as an ATM/WAN interface per se...they just use
a box that provides an ATM interface and connect it to a DS3. 

Note that ATM has a LOT of overhead (like 30%). so  ATM over a DS3 
is not nearly the bandwidth of using straight HSSI or PTP. ATM is meant
as a medium that can be switched at high speed, but as a PTP mechanism
it is very poor.

Dennis

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