Volume 28 : Issue 337 : "text" Format
Messages in this Issue:
Re: Verizon femtocell user report
====== 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
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 <email@example.com>
Subject: Re: Verizon femtocell user report
On Wed, 23 Dec 2009 15:20:42 -0500, "Geoffrey Welsh"
>> 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 *****
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
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.....
firstname.lastname@example.org - replace xyz with ntl
Date: Fri, 25 Dec 2009 00:21:09 -0500
From: Telecom digest moderator <email@example.com>
Subject: Merry Christmas
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.
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
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
43 Deerfield Road
Sharon MA 02067-2301
bill at horne dot net
Subscribe: firstname.lastname@example.org?body=subscribe telecom
Unsubscribe: email@example.com?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
End of The Telecom digest (2 messages)