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Volume 28 : Issue 337 : "text" Format

Messages in this Issue:
 Re: Verizon femtocell user report
 Merry Christmas

====== 28 years of TELECOM Digest -- Founded August 21, 1981 ====== Telecom and VOIP (Voice over Internet Protocol) Digest for the Internet. All contents here are copyrighted by Patrick Townson and the individual writers/correspondents. Articles may be used in other journals or newsgroups, provided the writer's name and the Digest are included in the fair use quote. By using -any name or email address- included herein for -any- reason other than responding to an article herein, you agree to pay a hundred dollars to the recipients of the email. =========================== Addresses herein are not to be added to any mailing list, nor to be sold or given away without explicit written consent. Chain letters, viruses, porn, spam, and miscellaneous junk are definitely unwelcome. We must fight spam for the same reason we fight crime: not because we are naive enough to believe that we will ever stamp it out, but because we do not want the kind of world that results when no one stands against crime. Geoffrey Welsh =========================== See the bottom of this issue for subscription and archive details and the name of our lawyer, and other stuff of interest.
Date: Thu, 24 Dec 2009 22:55:38 GMT From: Stephen <stephen_hope@xyzworld.com> To: redacted@invalid.telecom.csail.mit.edu Subject: Re: Verizon femtocell user report Message-ID: <t2s7j5taq2jrnpujuetimv0r619isbvqql@4ax.com> On Wed, 23 Dec 2009 15:20:42 -0500, "Geoffrey Welsh" <gwelsh@spamcop.net> wrote: >AES wrote: >> Comcast gives us typically a 10 to 20 MB Internet connection. >> Users guide for the femtocell claims it should work OK with a 300 >> to 400 KB DSL connection. > > A voice connection doesn't require much bandwidth, so it should work > with just about any wired or fixed wireless broadband service, but > voice connections are very sensitive to latency, and whether you > have 256 kilobits per second or 10 megabits per second, one poorly > configured BitTorrent client might render your calls intolerable... Voice traffic is normally symmetric (OK, with cellular maybe you get some silence suppression part of the time). So, what matters is the slwest traffic stream - upstream on a typical ADSL or cable broadband link. > >***** Moderator's Note ***** > > Why? The voice is sensitive to jitter and packet loss. Conventional G.711 / G.729 voice used with IP telephony jitter usually has a hard limit much lower than for typicl data traffic (well below 100 mSec). ITU recommendation is packet loss below 1%. Any sugnificant contention on a home link with no priority for voice is going to trash those numbers..... > >Bill Horne -- Regards stephen_hope@xyzworld.com - replace xyz with ntl
Date: Fri, 25 Dec 2009 00:21:09 -0500 From: Telecom digest moderator <redacted@invalid.telecom.csail.mit.edu> To: redacted@invalid.telecom.csail.mit.edu Subject: Merry Christmas Message-ID: <20091225052109.GA4583@telecom.csail.mit.edu> If you celebrate the holiday, I wish you a Merry Christmas. Whether or not you do, I also wish you the gifts of love and courage. Bill -- Bill Horne Moderator
TELECOM Digest is an electronic journal devoted mostly to telecom- munications topics. It is circulated anywhere there is email, in addition to Usenet, where it appears as the moderated newsgroup 'comp.dcom.telecom'. TELECOM Digest is a not-for-profit, mostly non-commercial educational service offered to the Internet by Bill Horne. All the contents of the Digest are compilation-copyrighted. You may reprint articles in some other media on an occasional basis, but please attribute my work and that of the original author. The Telecom Digest is moderated by Bill Horne. Contact information: Bill Horne Telecom Digest 43 Deerfield Road Sharon MA 02067-2301 781-784-7287 bill at horne dot net Subscribe: telecom-request@telecom-digest.org?body=subscribe telecom Unsubscribe: telecom-request@telecom-digest.org?body=unsubscribe telecom This Digest is the oldest continuing e-journal about telecomm- unications on the Internet, having been founded in August, 1981 and published continuously since then. Our archives are available for your review/research. We believe we are the oldest e-zine/mailing list on the internet in any category! URL information: http://telecom-digest.org Copyright (C) 2009 TELECOM Digest. All rights reserved. Our attorney is Bill Levant, of Blue Bell, PA. --------------------------------------------------------------- Finally, the Digest is funded by gifts from generous readers such as yourself who provide funding in amounts deemed appropriate. Your help is important and appreciated. A suggested donation of fifty dollars per year per reader is considered appropriate. See our address above. Please make at least a single donation to cover the cost of processing your name to the mailing list. All opinions expressed herein are deemed to be those of the author. Any organizations listed are for identification purposes only and messages should not be considered any official expression by the organization.
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