Date: Tue, 24 Sep 1996 12:16:24 -0400 (EDT) From: Mike Newell <mnewell@newell.arlington.va.us> To: Bill Lloyd <wlloyd@mpd.ca> Cc: doc@freebsd.org Subject: Re: isdn documentation changes Message-ID: <Pine.BSF.3.91.960924120629.10141C-100000@bigpuppy.newell.arlington.va.us> In-Reply-To: <32443F29.7604@mpd.ca>
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On Sat, 21 Sep 1996, Bill Lloyd wrote: > A TA will allow you to do Dynamic IP with your Internet provider. > Unless you can get a static IP this is really your only option to do > ISDN with your Internet provider. This is true of ANY connection with an ISP. If you can't get static address assignment you get dynamic. :-) > The real problam with external TA's is like modems you need a good > serial card in your computer. This might could be a tad more specific: The real problem with TA's is that they generally are limited to 115.2Kbs even when connecting at 128Kbs. This means you can't get the full advantage of ISDN. > <p>As the cost of low end ISDN routers/bridges approaches that of a > Terminal Adapter, it will likely become a more and more popular choice. > An ISDN router is a small box that plugs directly into your local > ethernet network(or card) and manages it's own connection to the other > bridge/router. It has all the software to do PPP and other protocols > built in. What standalone router/bridges prices are approaching TA's? TA's are in the $300+ range; most brouters are in the $800+ range. That's quite a difference... > A router will allow you much faster thoughput that a standard TA, since > it will be using a full synchronous ISDN connection. A TA can also do this, especially if the TA is implemented as an internal model and hence doesn't have to go through the serial ports. > A router will also usually allow you to have 2 ISDN connections open at > the same time. One on each B channel. This is not supported on most > TA's, except for specific(expensive) models that have two serial ports. Not true - the BitSurfr Pro will use both B channels. Nice document! Much obliged, Mike +--------------------------------------+------------------------------------+ | Mike Newell | The opinions expressed herein | | Affiliation: | are mine. You can take them or | | Address: | leave them. Flames to /dev/null. | +--------------------------------------+------------------------------------+ | Mike@Newell.arlington.va.us | http://www.newell.arlington.va.us | +--------------------------------------+------------------------------------+ | "Peace. It's wonderful!" Father Divine. | +---------------------------------------------------------------------------+home | help
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