New Zealand ADSL Mailing List


Re: TNZ and VoIP

From: Steve Phillips <steve_at_focb.co.nz>
Date: Mon, 21 Mar 2005 15:06:47 -0600 (CST)
Message-ID: <Pine.LNX.4.60.0503211504360.27568@wibble.focb.co.nz>

Would people on this list like some tinfoil hats as well ?

This has been discussed at length on NZNOG as well and the conclusion is
that the author of the article has no idea what he's talking about.

There is no point in even starting a rant on this list on this subject.
Anyone interested can goto the nznog archives at http://list.waikato.ac.nz
and read the posts for themselves.

-- 
Steve.
On Tue, 22 Mar 2005, Gordon J Milne wrote:
> This was at the tail-end of a Robert Cringely article this week:
>
> /And there are other dirty tricks available to broadband ISPs. Telecom New 
> Zealand, for example, is reportedly planning to alter TCP packet interleaving 
> to discourage VoIP. By bunching all voice packets in the first half of each 
> second, half a second of dead air would be added to every conversation, 
> changing latency in a way that would drive grandmothers everywhere back to 
> their old phone companies. This is because phone conversations happen 
> effectively in real time and so are very sensitive to problems of latency. 
> Where one-way video and audio can use buffering to overcome almost any 
> interleaving issue, it is a deal-breaker for voice.
> /
> First, where does he get this information? Secondly, do TNZ really think they 
> can get away with this one? Thirdly, would the regulator even understand the 
> paragraph above?
>
>
-- 
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Received on Tue Mar 22 09:06:55 2005

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