The Telecom Digest

29 Years of the Digest ... founded August 21, 1981

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The Telecom Digest for March 13, 2011
Volume 30 : Issue 64 : "text" Format

Messages in this Issue:

Re: How does Comcast deliver dial tone? (Steven)

Re: How does Comcast deliver dial tone? (John Levine)

Re: How does Comcast deliver dial tone? (David Clayton)

Re: How does Comcast deliver dial tone? (Eric Tappert)

Re: Annoyance Calls (Fred Atkinson)

====== 29 years of TELECOM Digest -- Founded August 21, 1981 ======

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Date: Fri, 11 Mar 2011 11:31:41 -0800
From: Steven <diespammers@killspammers.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: How does Comcast deliver dial tone?
Message-ID: <ildtau$g8e$1@news.eternal-september.org>

> ***** Moderator's Note *****
>
> I used to have DSL from Covad, which topped out at ~680Kbps, not even
> the minimum I had contracted for. Covad couldn't fix it.
>
> I recently changed to (spit) Verizon DSL, which does 1,500Kbps with no
> problem. It seems that some cable pairs are more equal than others:
> 'twas ever thus, 'twill ever be.

You might be getting constant speeds because they have Interleaved your 
cable pair.  I had major problems with very old cable and slow speeds, 
the Noc Tech set my line this way and all problems went away, that is 
unless it really rains hard.

Date: 11 Mar 2011 20:35:24 -0000
From: John Levine <johnl@iecc.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: How does Comcast deliver dial tone?
Message-ID: <20110311203524.47968.qmail@joyce.lan>

>> Does anyone know why Comcast has so many problems with their phone
>> connections?
>
>Same problems as with any VOIP over a shared "party line" connection,
>latency and congestion. Phone calls are where latency shows up first,
>because you have to send and receive the packets in order and
>regularly,

Comcast's phone service is based on PacketCable, which includes
QoS features that give the phone traffic priority over data.

I'd be rather surprised if the problems were due to congestion
on the cable system.

R's,
John

Date: Fri, 11 Mar 2011 08:04:18 +1100
From: David Clayton <dcstar@myrealbox.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: How does Comcast deliver dial tone? 
Message-ID: <pan.2011.03.10.21.04.15.553841@myrealbox.com>

On Thu, 10 Mar 2011 15:54:35 +0000, Adam H. Kerman wrote:

> Bill Horne <bill@horneQRM.net> wrote:
.........
>>Does anyone know why Comcast has so many problems with their phone
>>connections?
>
> Sunspots.

That may sound a little facetious to some people, but I wonder with our
increasing reliance on Wireless connections of all sorts that this sort of
thing will be an increasing issue over the upcoming decades?

The number of individuals on the planet reliant on Wireless connections
must have exploded since the last 11-year Sunspot cycle.

--
Regards, David.

David Clayton
Melbourne, Victoria, Australia.
Knowledge is a measure of how many answers you have, intelligence is a
measure of how many questions you have.

Date: Fri, 11 Mar 2011 20:19:52 -0500
From: Eric Tappert <e.tappert.spamnot@worldnet.att.net>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: How does Comcast deliver dial tone?
Message-ID: <7biln6t1a6a26onsbj1ftmloe22sfvkhr2@4ax.com>

On Thu, 10 Mar 2011 09:05:58 -0800, Bruce Bergman
<brucebergman@gmail.com> wrote:

>> Date: Thu, 10 Mar 2011 01:43:21 -0500
>> From: Bill Horne <bill@horneQRM.net>
>> To: redacted@invalid.telecom-digest.org.
>> Subject: How does Comcast deliver dial tone?
>> Message-ID: <4D787309.9050303@horne.net>
>>
>> I was on a phone call with a friend who has phone service from Comcast,
>> and I was reminded several times of why I dropped them: his voice would
>> cut off for two or three seconds at a time, and he said mine would too.
>>
>> Does anyone know why Comcast has so many problems with their phone
>> connections?
>>
>
>Same problems as with any VOIP over a shared "party line" connection,
>latency and congestion. Phone calls are where latency shows up first,
>because you have to send and receive the packets in order and
>regularly, and the majority of them need to arrive on time and in
>order. If there was a huge buffer of data packets to keep it streaming
>constantly over a so-so connection (and allow time to resend any
>missing packets) there would be a huge time delay in the conversation
>- like watching TV News conversations between the Anchor in New York
>and the Correspondent in Cairo when there is a 6 to 8 second delay
>because of multiple satellite hops.

[Moderator snip]

>--<< Bruce >>--
>
>***** Moderator's Note *****
>
>I used to have DSL from Covad, which topped out at ~680Kbps, not even
>the minimum I had contracted for. Covad couldn't fix it. 
>
>I recently changed to (spit) Verizon DSL, which does 1,500Kbps with no
>problem. It seems that some cable pairs are more equal than others:
>'twas ever thus, 'twill ever be.
>
>Bill Horne
>Moderator

THE reason why voice over IP is a second class service.  A dedicated
circuit (i.e. a switched circuit connection) will always deliver
better service than an IP connection.  Unless, of course, one provides
unlimited bandwidth...

Of course, cost prevails...

ET

Date: Fri, 11 Mar 2011 19:09:07 -0700
From: Fred Atkinson <fatkinson.remove-this@and-this-too.mishmash.com>
To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org.
Subject: Re: Annoyance Calls 
Message-ID: <2blln6dufaqqdom8qk9to1u514vgaqg41e@4ax.com>

	I got another call from those jerks in Harlingen, TX.  

	The number was: (956)421-4967 .  

	I've blocked them, too.  

	I called them back and I keep getting an autodialer over and
over.  So I've put them on hold.  They think they are calling
different numbers but they are on a dead line for all practical
purposes.  Fortunately, I have flat rate long distance.  

	This is beyond ridiculous.  

						Fred

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End of The Telecom Digest (5 messages)

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