29 Years of the Digest ... founded August 21, 1981
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The Telecom Digest for April 02, 2011
Volume 30 : Issue 84 : "text" Format
====== 29 years of TELECOM Digest -- Founded August 21, 1981 ====== |
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Date: Fri, 01 Apr 2011 06:31:32 -0700
From: Sam Spade <sam@coldmail.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: No-Call List Enforcement In USA: Dead or Dying?
Message-ID: <QpudnTbbLf4pTgjQnZ2dnUVZ_q6dnZ2d@giganews.com>
Pete Cresswell wrote:
>
> Since reading this http://tinyurl.com/qhvwrr , I suspect that a
> fix will be forthcoming within a year or two max.
>
> My hope is that said fix doesn't involve something that costs too
> much for us peons.
>
If you believe he is doing anything other than grandstanding...well,
enjoy. The FTC doesn't have the staff to change anything.
Date: Fri, 01 Apr 2011 10:30:09 -0700
From: RonTheGuy <not@null.invalid.telecom-digest.org>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Label for PoE-powered device?
Message-ID: <not-E916EE.10300901042011@h46.4.82.166.static.ip.windstream.net>
What do manufacturers put on their product label for power input
specification on a product powered by PoE? Give the max voltage as 57V
DC? Show a spec for current? Anything else?
Ron
Date: Fri, 1 Apr 2011 09:22:36 -0400
From: "AJB Consulting" <ajbcs@frontier.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: Does FiOS support rotary phones?
Message-ID: <000a01cbf06f$e2a98e30$01fea8c0@dell8100>
There seems to be some misconceptions in this thread that need clearing
up. I realize this is about three weeks late, but as the saying goes,
better late than never.
The most important point to remember is that with any modern consumer
"box" that provides a POTS interface for the end user, whether or not
certain standard phones will work has nothing to do with how the box
connects to the service provider. This applies irrespective of the
connection type and protocol that your service provider uses between the
box and the CO. It could be an ATA [Analog Telephone Adapter] furnished
by a VoIP provider, a box from a CATV company, a FiOS ONT [Optical
Network Termination], or even an SLT [Single Line Telephone] port on a
modern electronic key system. In all of these cases, whatever you dial
with your POTS phone to set up a call is digested completely by your
local box, which then does whatever it has to do to set up your call.
It all comes down to what types of phones the makers of said box decide
to support.[1]
For the record, FiOS uses a real-time 64 kbps channel[2] for each phone
number that appears at the POTS interface connections on the ONT. This
channel is just a tiny part of the optical bitstreams between the end
user and the CO, and at the CO end, in many cases, it simply goes
through a digital cross-connect and presents as a DS0 to an existing
5ESS switch. I don't have access to the written practices that would
detail call setup, but more than likely the necessary information is
passed on to the same switch much in the same way it would be for a
voice channel in an ISDN/PRI [23+D]. The more things change, the more
they stay the same.
So does the FiOS ONT support rotary-dial phones? That is the million
dollar question, and the only way to answer it is to get your mitts on
the manufacturer's documentation for the ONT. Earlier FiOS installs in
this area used an ONT made by a company whose name escapes me [they were
later bought by Tellabs]. More recent installs in this area use an ONT
made by Alcatel-Lucent, and here is where you will run into a brick
wall. Documentation for end-user Lucent equipment remains readily
available under the Alcatel regime, but anything in the carrier
equipment line requires a log-in and password, which you can get by
having an active service provider account with them. Bill, you probably
have much better connections in this area than most of us - perhaps it
is time to call in a favor.
Here are the footnotes, if the reader can stand any more:
[1] The biggest beef most people have with these boxes is that they do
not conform to long-established standards for an FXS [POTS] interface.
Ringing is the most common complaint, as the boxes seldom provide true
90 VAC sinusoidal current properly imposed on DC loop voltage to enable
answer detection. The makers of this equipment either don't know or
don't care about the standards, and they wind up reinventing the wheel.
Their new wheel often comes out square, which is especially amusing when
one considers that there are numerous readily available ASIC chips on
the market that could do all of this for them - all they had to do was
open a catalog. Other common complaints about these boxes include DC
loop current and/or voltage that is not within established standards,
sloppy answer [off-hook] detection, lack of CPC support, and so on.
[2] Pseudo real-time. It is contained in the ATM data stream, but does
not have to go through the gyrations of packetized IP data.
Jim Bennett
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