From owner-freebsd-isp Sun Sep 27 23:27:15 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA09053 for freebsd-isp-outgoing; Sun, 27 Sep 1998 23:27:15 -0700 (PDT) (envelope-from owner-freebsd-isp@FreeBSD.ORG) Received: from mrtg.senet.com.au (mrtg.senet.com.au [203.56.239.25]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA09037 for ; Sun, 27 Sep 1998 23:27:10 -0700 (PDT) (envelope-from chris@senet.com.au) Received: from foo.senet.com.au (IDENT:chris@foo.senet.com.au [203.34.34.35]) by mrtg.senet.com.au (8.9.1/8.9.1) with SMTP id PAA04901; Mon, 28 Sep 1998 15:56:43 +0930 (CST) Date: Mon, 28 Sep 1998 15:56:30 +0930 (CST) From: Chris Foote To: Andrew McNaughton cc: jim@thunder.st0rm.com, isp@FreeBSD.ORG Subject: Re: backbone connections in Australia In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Mon, 28 Sep 1998, Andrew McNaughton wrote: > > Ihug offers sattelite dishes to home users in new zealand with a similar > arrangement re phonel ine for outgoing data. They charge $600 setup + $79 > per month for a 400Kbit link. Your setup is ten times the bandwidth for > 1000 times the price. Yep. It's a lot different for the consumer market - it's a very shared link. (i.e. all receivers see the same traffic at the demodulator, with the routing capability of the router distinguishing traffic just destined for the particular person). At the wholesale level, we buy transponder space for a minimum of 2 years, which runs at a dedicated frequency for the demodulator connecting to a HSSI interface. There's no way you could accomplish sustained high traffic levels on a shared carrier. > Latency is reportedly about 0.1 second. The sattelite uplink isn't in the USA then! It takes something like 290ms from USA to Australia; so round trip for 56 bytes is terrestial link + IP overhead + sattelite latency + router cpu overhead; around 490ms. Chris Foote SE Net Technical Manager 222 Grote Street SE Network Access Adelaide SA 5000 e-mail chris@senet.com.au Australia phone : (08) 8221 5221 PGP Public Key available from fax: (08) 8221 5220 http://www.senet.com.au/PGP support: (08) 8221 5792 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message