From owner-freebsd-net Mon Apr 24 20:16:39 2000 Delivered-To: freebsd-net@freebsd.org Received: from daemon.best.ca (cr262311-a.lngly1.bc.wave.home.com [24.113.173.186]) by hub.freebsd.org (Postfix) with ESMTP id 54D5237BFB7 for ; Mon, 24 Apr 2000 20:16:37 -0700 (PDT) (envelope-from rfurda@best.ca) Received: from winblowz (winblowz [10.254.254.2]) by daemon.best.ca (Postfix) with ESMTP id 10360D72E1; Mon, 24 Apr 2000 18:07:09 -0700 (PDT) Message-Id: <4.2.0.58.20000424175005.0095a590@best.ca> X-Sender: riso@best.ca X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.0.58 Date: Mon, 24 Apr 2000 18:06:58 -0700 To: Ryan Thompson From: Richard Furda Subject: Re: Max T1. Throughput? Cc: freebsd-net@freebsd.org In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_60627404==_.ALT" Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org --=====================_60627404==_.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Hello, At 06:06 PM 4/24/00 -0600, you wrote: >There seems to be some confusion around our region on what the maximum >throughput of a T1 is. A T1 digital stream consists of 24 64kbps multiplexed time slots which come to a total of 1.536mbps, extra 8kbps is for framing. Thus, possible maximum throughput of a T1'd be: 192Kbytes/sec. >(Actually, we are on a 1.544Mbps leased SDSL line >from a local ISP. The package was sold to us as a burstable T1). A 'burstable' T1 IMHO implies that it can burst up to 1.544 but not steady 1.544mbps. >Is SDSL the key, here? Perhaps I took "Synchronous" in the wrong >way. Does "Synchronous" imply UP = DOWN = 1.54Mbps / 2? Symetric means, both up/down, or 'both ways' if you will. Cable modem ISPs usually provide asymmetric access, thus high download rate, slow upload rate. Rich --- Richard Furda PGP public key: http://www.best.ca/rfurda.pkr --=====================_60627404==_.ALT Content-Type: text/html; charset="us-ascii"
        Hello,

At 06:06 PM 4/24/00 -0600, you wrote:
There seems to be some confusion around our region on what the maximum
throughput of a T1 is. 

A T1 digital stream consists of 24 64kbps multiplexed time slots which come
to a total of 1.536mbps, extra 8kbps is for framing. Thus, possible maximum
throughput of a T1'd be: 192Kbytes/sec.

(Actually, we are on a 1.544Mbps leased SDSL line
from a local ISP.  The package was sold to us as a burstable T1).

A 'burstable' T1 IMHO implies that it can burst up to 1.544 but
not steady 1.544mbps.

Is SDSL the key, here?  Perhaps I took "Synchronous" in the wrong
way.  Does "Synchronous" imply UP = DOWN = 1.54Mbps / 2?

Symetric means, both up/down, or 'both ways' if you will. Cable
modem ISPs usually provide asymmetric access, thus high download
rate, slow upload rate.

        Rich




---
Richard Furda           
PGP public key:    http://www.best.ca/rfurda.pkr --=====================_60627404==_.ALT-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message