Date: Mon, 26 Aug 1996 03:38:25 -0500 (CDT) From: "Matthew N. Dodd" <winter@jurai.net> To: Robert Shady <rls@mail.id.net> Cc: freebsd-isp@FreeBSD.org Subject: Re: 128k ISDN vs. T1 Message-ID: <Pine.BSI.3.95.960826032920.2407F-100000@sasami.jurai.net> In-Reply-To: <199608252058.QAA11788@server.id.net>
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On Sun, 25 Aug 1996, Robert Shady wrote: > ISDN Primary Rate Interface Service is 23 ISDN B channels, and a single > ISDN D channel coming in over a single T1. The original post was meant to Actually you can do whatever you want to with a PRI. There are pre NI-2 standards that allow you do do what NFAS does on the DMS and on 5ESS's running older software. So you can have any arbitrary number of B channels delivered over any number of T1 lines and have Primary and Backup D channels. For example, when I add a 3rd PRI, I'm not going to order it with a D channel. I'll get 24 B's on that line, and I'll use the D channel on one of my other lines. I'm aware of Meridian systems that have a primary and a backup D channel and 3 to 4 hundred B channels, all delivered over T1s or T3s. The really nifty thing about ISDN is that most of the telco people here seem to have missed the fact that you can run data over it. *grin* They all think its the best thing since sliced bread as far as running voice etc. (which, it is.) > topic I'd be happy to discuss.. We have several companies that think the > savings of using ISDN vs. FT1 is well worth the minor inconviences that > ISDN has... Typically, ISDN and FT1 are for two different applications. That we are able to use nailed-up ISDN lines to provide dedicated lines to customers is only a slight feature of the technology, and has a large amount to do with the pricing structure and tarrifs in your service area. Also, BRI service is *NOT* a high priority for repair service (at least in BellSouth land). If your customer wants immediate repair responce when their line goes down, sell them on a 56k, FT1 (if available) or T1. Hell, sometimes I don't think I get priority responce on my PRIs... Have a good one. | Matthew N. Dodd | winter@jurai.net | http://www.jurai.net/~winter | | Technical Manager | mdodd@intersurf.net | http://www.intersurf.net | | InterSurf Online | "Welcome to the net Sir, would you like a handbasket?"|
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