Date: Mon, 21 May 2001 20:28:18 +0200 (METDST) From: hm@hcs.de (Hellmuth Michaelis) To: fsteevie@dds.nl Cc: freebsd-isdn@FreeBSD.ORG Subject: Re: Using the D-Channel Message-ID: <20010521182819.29C8F51D@hcswork.hcs.de> In-Reply-To: <01052116504801.00668@coyote> "from Steve_ at May 21, 2001 04:50:48 pm"
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From the keyboard of Steve_: > I knew it for a long time, but I just got interest in the (free) D-Channel. The D-channel is not "free", have a look at your carriers fine print ... ;-) > I know some programs (D-Chat, IsdnChat > (http://www.wirehub.nl/~ernesto/index.html)) which use the D-Channel, but in > a very inefficient way (you can only send 20 chars or so, ...). > > I haven't really did any research yet, but is it possible to make something > samilliar? Yes it is, i can imagine several ways to do that. > If so, where to find any docs. All you need is the ISDN D-channel layer 3 doc, they can be found on www.etsi.org. > I also know that it is possible to get up to 16 kbit using the D-Channel > (also free, i thought), but using some kind of protocol. Does anybody know > anything about this? Same, it is not free, at least not here in Germany. Its called the UUS (User-User-Signalling) protocol and costs ~10DM/month IIRC. Just FYI, there was a hype for AODI last year, which was an invention from the US and "everyone" said it was a _must_ to implement it. It was basically a permanent link on the D-channel and was sold for 10DM a month in the test phase here. This "_must_ to implement" was cancelled mostly because of a complete lack of interest some time ago here..... Bottom line: you will put much work into something which will be painfully slow to use and which will get you into severe troubles with your carrier in case you want to use it for something which transfers more than a few bits per hour. Anyway, try it out - you will learn a lot ;-) hellmuth -- Hellmuth Michaelis Tel +49 40 55 97 47-70 HCS Hanseatischer Computerservice GmbH Fax +49 40 55 97 47-77 Oldesloer Strasse 97-99 Mail hm [at] hcs.de D-22457 Hamburg WWW http://www.hcs.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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