Archived from groups: comp.dcom.voice-over-ip (
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In article <d18974cd.0408171129.48a70c46@posting.google.com>,
James Body <google@jrrf.co.uk> wrote:
>btm@templetons.com (Brad Templeton) wrote in message
>news:<10i3hcajr5atl3f@corp.supernews.com>...
>Good - we agree then - Skype have SOFTPHONE ONLY, if you want a VoIP
>solution that interfaces to a 'proper' telephone or some other
>existing telephony hardware, Skype really is not the solution to
>choose.
I am not sure what a "proper telephone" is and why a handheld
device would not be usuable as one.
But actually, this is where a lot of SIP folks have it dead wrong.
They think, "Let's make VoIP as much like the regular phone as
we can! Let's demand it work on a 'proper' telephone."
I understand perfectly why they say this. It is the classic
mistake in dealing with a potentially disruptive technology, try
to make it evolutionary instead of revolutionary.
"Almost as good as a regular phone but at least it's harder to
configure" is a failure-destined strategy for VoIP.
>
>Skype has a SIP gateway? I think not!
Yup, or an H.323 one. It's just not available directly. In order
to use iBasis to terminate in the PSTN, which is what I hear they
are using, you would need to use SIP or H.323. So when you use
SkypeOut, at some point the call is being converted to SIP or 323.
>
>And please check your figures - Free World Dialup is over 250,000 and
>Vonage passed 155,000 on 17 May 2004 - and that is only two of the
>many SIP ITSPs available worldwide!
I have checked my figures. FWD has that many registered users, but
only a few thousand are on at any given time. Vonage has reached
many customers, but you can't dial them with an open SIP URL.
(FWD has a gateway into Vonage to make SIP calls, so one hopes at some
point things will oepn up a bit more.)
Skype has many millions of downloaders, and seems to have 400,000
actively on at any given time. It's orders of magnitude bigger
than all the pure SIP internetworks, and it go there in under a year,
compared to years for the SIP groups.
>I have been using Skype since it was first released. Skype claim over
>19 million downloads of their client - I note that over 20 of these
>downloads have been by me!
Ok, so why do you think Skype has poor quality voice codecs? Have
you only used it over a dialup link? Tried g.711 over dialup?
>
>an aggregated bit rate after overheads of around 13-16 kbps. Whilst
>iLBC is indeed a fine codec (it is used extensively by the Open Source
>SIP Developers community), it can not be compared with a 'lossless'
>codec such as G.711a/u. Also note that SIP allows even higher quality
>'hi-fi' codecs to be employed if required - with SIP you are not tied
>to one single codec!
Again, you seem to have not really explored Skype in spite of the
times you have downloaded it.. All the Skype calls
I have done have not used ILBC, they use the GIPS high-frequency
codecs, which 16khz of frequency, and thus near-FM quality.
>'Whupping' is not a term I would have used here - one thing that Skype
>are VERY good at is HYPE - and I guess that the entire VoIP community
>are grateful to Niklas Zennstrom for raising public awareness on VoIP,
>yet it does not make Skype a better product! And there are limits to
>the size of community that the Skype architecture can support - Skype
>creaks a bit in its current form - what will it be like if it doubles
>or even triples in size?
My understanding from talking to their folks is the reverse, that it
should keep scaling fine.
I have done a lot of SIP development, I made big bets on SIP, and
I am a big fan of it. But I know when somebody comes in and does it
better, and I admit it.
Skype is not hype. It is better, a lot better. It's a wakeup call
for the SIP and H.323 communities. Somebody doing it entirely
proprietary can do it better than you and pass you while you are
sleeping.
This is not just me. The people who designed a lot of the SIP
protocols, whom I have spoken to most of personaly, will privately
admit that the SIP world has dropped balls here. That all these things
are in the SIP protocol but so rarely correctly implemented that you
can't use them. Seamless NAT traversal, encryption, high frequency
codecs, presence, easy configuration. It's all there, but it never gets used.
Just boring G.711 calls to a small number of people. That's the
reality of SIP deployment after years of effort.
Skype wakes you up because it delivers easy install, encryption every
time, high quality codecs, near-flawless NAT traversal, presence, chat.
All the time (except on dial-up where good luck doing a SIP call) and
with no effort. To a much larger body of people.
>services (both SIP (e.g. FWD) and Skype), I guess that most users will
>prefer to pay a little more for a supported service with more
>functionality....
One would think, but then why has Skype got more people in under a
year using it than SIP or H.323. (I mean knowingly using it. There
are large numbers of people using SIP or 323 based VOIP without
knowing it, using it as PSTNoIP.) If SIP is to be more than PoIP,
it's already lost to Skype, and the ball is in SIP's court.
--
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