From owner-freebsd-isp Sun Apr 6 21:30:22 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id VAA17627 for isp-outgoing; Sun, 6 Apr 1997 21:30:22 -0700 (PDT) Received: from who.cdrom.com (who.cdrom.com [204.216.27.3]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id VAA17573 for ; Sun, 6 Apr 1997 21:30:13 -0700 (PDT) Received: from obiwan.aceonline.com.au (obiwan.aceonline.com.au [203.103.90.67]) by who.cdrom.com (8.8.5/8.6.11) with ESMTP id SAA27756 for ; Sun, 6 Apr 1997 18:01:22 -0700 (PDT) Received: from localhost (adrian@localhost) by obiwan.aceonline.com.au (8.8.5/8.8.5) with SMTP id IAA01450 for ; Mon, 7 Apr 1997 08:51:01 +0800 (WST) Date: Mon, 7 Apr 1997 08:51:01 +0800 (WST) From: Adrian Chadd To: freebsd-isp@freebsd.org Subject: Re: E-1 ? In-Reply-To: <3.0.32.19970406132146.00bef93c@mixcom.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-isp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Sun, 6 Apr 1997, Jeffrey J. Mountin wrote: > >E-1 is the Europeon equivalent of T1, although its not really equivalent in > >that > >its 2.048Mbs, rather than 1.536, as they use 32 64k channels rather than 24. > > There is a bit of overhead along with 24 * 64 for 1.544 Mbs. Even this is > not set in stone, but is the guaranteed minimum rate. I've seen up to > 1.724 on one of our T1s. > > E1s have 30 channels. > It rings a bell, its either PRI or Frame Relay from memory, but I honestly can't remember which one it is. (We have something similar in Australia, a 2mb DDS Fastway link is 31 x 64k slices). I've always been curious though.. why 24 x 64k chunks on a T1? Why not more? Cya -- Adrian Chadd | UNIX, MS-DOS and Windows ... | (also known as the Good, the bad and the | ugly..)