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	<title>Fred's Notes &#187; VoIP</title>
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	<link>http://blog.marques.cx</link>
	<description>Comments, notebook, links and all the talk</description>
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		<title>Let&#8217;s block Skype and Bittorrent</title>
		<link>http://blog.marques.cx/2007/10/25/lets-block-skype-and-bittorrent/</link>
		<comments>http://blog.marques.cx/2007/10/25/lets-block-skype-and-bittorrent/#comments</comments>
		<pubDate>Thu, 25 Oct 2007 09:32:13 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Internet]]></category>
		<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://blog.marques.cx/2007/10/25/lets-block-skype-and-bittorrent/</guid>
		<description><![CDATA[This is a really good article explaining why ISP&#8217;s and operators most of the times don&#8217;t think about the consequences of packet inspection (DPI). False positives are very bad for business. My view is that a lot of the more onerous terms-of-service for broadband (fixed or wireless), or heavy-handed traffic shaping, are going to evaporate [...]]]></description>
			<content:encoded><![CDATA[<p><a href="http://disruptivewireless.blogspot.com/2007/10/comcast-caveat-inspector.html">This is a really good article</a> explaining why ISP&#8217;s and operators most of the times don&#8217;t think about the consequences of packet inspection (DPI). False positives are very bad for business.</p>
<blockquote><p>My view is that a lot of the more onerous terms-of-service for broadband (fixed or wireless), or heavy-handed traffic shaping, are going to evaporate under commercial &#038; PR pressure over the next year or so. And I&#8217;m expecting quite a lot of Comcast-type attempts to be outed by people monitoring traffic flows and reverse-engineering what&#8217;s causing problems.</p>
<p>As I&#8217;ve said before &#8211; I can&#8217;t get especially exercised about Net Neutrality. Because anyone stupid enough to block benign traffic (even if they don&#8217;t like it for commercial reasons) is going to heavily burnt. I think the market will understand providers wanting to stop network integrity being threatened &#8211; but it will show zero tolerance for vindictive or accidental &#8216;collateral damage&#8217;.</p></blockquote>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>SkypeOff</title>
		<link>http://blog.marques.cx/2007/08/18/skypeoff/</link>
		<comments>http://blog.marques.cx/2007/08/18/skypeoff/#comments</comments>
		<pubDate>Sat, 18 Aug 2007 12:25:36 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://blog.marques.cx/2007/08/18/skypeoff/</guid>
		<description><![CDATA[Apparently there&#8217;s a new Skype service on the block. It&#8217;s called SkypeOff. So far, it&#8217;s a huge hit.]]></description>
			<content:encoded><![CDATA[<p>Apparently there&#8217;s a new Skype service on the block. It&#8217;s called SkypeOff. So far, it&#8217;s a huge hit.</p>
]]></content:encoded>
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		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Skype Mac with Video</title>
		<link>http://blog.marques.cx/2006/07/25/skype-mac-with-video/</link>
		<comments>http://blog.marques.cx/2006/07/25/skype-mac-with-video/#comments</comments>
		<pubDate>Tue, 25 Jul 2006 16:34:11 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Mac]]></category>
		<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://blog.marques.cx/2006/07/25/skype-mac-with-video/</guid>
		<description><![CDATA[Goodbye iChat.]]></description>
			<content:encoded><![CDATA[<p><a href="http://pfig.livejournal.com/105964.html">Goodbye iChat</a>.</p>
]]></content:encoded>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Skype Protocol has been cracked?</title>
		<link>http://blog.marques.cx/2006/07/13/skype-protocol-has-been-cracked/</link>
		<comments>http://blog.marques.cx/2006/07/13/skype-protocol-has-been-cracked/#comments</comments>
		<pubDate>Thu, 13 Jul 2006 21:46:24 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Internet]]></category>
		<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://blog.marques.cx/2006/07/13/skype-protocol-has-been-cracked/</guid>
		<description><![CDATA[Wow, someone is saying that it has been done by a chinese company. The application code of Skype Protocol will be offered for license by the end of July. If this is true, I think eBay will face trouble: This could also have a terrible effect on eBay should they choose to leverage their Skype [...]]]></description>
			<content:encoded><![CDATA[<p>Wow, <a href="http://webtown.typepad.com/webtown/2006/07/skype_protocol_.html">someone is saying</a> that it has been done by a chinese company. The application code of Skype Protocol will be offered for license by the end of July. If this is true, I think eBay will face trouble:</p>
<blockquote><p>This could also have a terrible effect on eBay should they choose to leverage their Skype client to host advertisements. Now that there is the prospect of a competing client available there is little doubt that there will be an ad free alternative to Skype should advertisements on Skype appear in the future.</p>
<p>From a legal standpoint eBay is out of luck. First, Skype itself is not viewed as “legal” in China. Chinese regulatory authorities have even looked into ways to block Skype in various regions of China. The Chinese telecom giants are not at all pleased with Skype stealing IDD revenue from their pockets. They will enthusiastically support a domestic Chinese company with the engineering talent to reverse engineer Skype. I wouldn’t be surprised if a major Chinese telco ends up licensing this technology to produce a competing Skype client for use in China.</p></blockquote>
<p><a href="http://eurotelcoblog.blogspot.com/2006/07/bootleg-skype-anyone-lee-dryburgh.html">Via Eurotelcoblog. </a></p>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>E o resto &#233; conversa</title>
		<link>http://blog.marques.cx/2005/08/24/e-o-resto-conversa/</link>
		<comments>http://blog.marques.cx/2005/08/24/e-o-resto-conversa/#comments</comments>
		<pubDate>Wed, 24 Aug 2005 10:46:38 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://marques.cx/wordpress/?p=578</guid>
		<description><![CDATA[Google Talk is here, have no fear.]]></description>
			<content:encoded><![CDATA[<p><a href="http://www.google.com/talk/index.html">Google Talk</a> <a href="http://www.simplicidade.org/notes/archives/2005/08/google_talk_is.html">is here</a>, have no fear.</p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>New toy for Skype</title>
		<link>http://blog.marques.cx/2005/08/03/new-toy-for-skype/</link>
		<comments>http://blog.marques.cx/2005/08/03/new-toy-for-skype/#comments</comments>
		<pubDate>Wed, 03 Aug 2005 16:36:40 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://marques.cx/wordpress/?p=570</guid>
		<description><![CDATA[Just another Cordless Skype Phone, with USB Port and Regular phone. Anynone knows if this phone is already being sold at the European market?]]></description>
			<content:encoded><![CDATA[<p><a onclick="window.open('http://blog.marques.cx/archives/new01.html','popup','width=250,height=321,scrollbars=no,resizable=no,toolbar=no,directories=no,location=no,menubar=no,status=no,left=0,top=0'); return false" href="http://blog.marques.cx/archives/new01.html"><img width="200" height="256" src="http://blog.marques.cx/archives/new01-thumb.jpg" /></a></p>
<p>Just another <a href="http://www.tecline.com.tw/2005/new01.htm">Cordless Skype Phone</a>, with USB Port and Regular phone. Anynone knows if this phone is already being sold at the European market?</p>
]]></content:encoded>
			<wfw:commentRss>http://blog.marques.cx/2005/08/03/new-toy-for-skype/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Project Gizmo</title>
		<link>http://blog.marques.cx/2005/07/02/project-gizmo/</link>
		<comments>http://blog.marques.cx/2005/07/02/project-gizmo/#comments</comments>
		<pubDate>Sat, 02 Jul 2005 17:15:52 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://marques.cx/wordpress/?p=553</guid>
		<description><![CDATA[Estou a instalar um Skype-like App, mas que funciona com SIP, o Project Gizmo. A vers&#227;o para Mac &#233; bonitinha. A quem interessar, o meu Gzimo ID &#233; vonfreud e o SIP number &#233; o 17476037955. E a&#237; est&#225;, reparei logo na vantagem do Skype sobre o resto, o facto de usar TCP permitia-me utilizar [...]]]></description>
			<content:encoded><![CDATA[<p>Estou a instalar um Skype-like App, mas que funciona com SIP, o <a href="http://www.gizmoproject.com/index.html">Project Gizmo</a>. A vers&atilde;o para Mac &eacute; bonitinha. A quem interessar, o meu Gzimo ID &eacute; vonfreud e o SIP number &eacute; o 17476037955. E a&iacute; est&aacute;, reparei logo na vantagem do Skype sobre o resto, o facto de usar TCP permitia-me utilizar aplica&ccedil;&atilde;o na VPN da empresa onde trabalho (firewalls &#038; acls are evil). Com o SIP do Gizmo, no can do.</p>
]]></content:encoded>
			<wfw:commentRss>http://blog.marques.cx/2005/07/02/project-gizmo/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Sapo Messenger suporta VoIP</title>
		<link>http://blog.marques.cx/2005/06/30/sapo-messenger-suporta-voip/</link>
		<comments>http://blog.marques.cx/2005/06/30/sapo-messenger-suporta-voip/#comments</comments>
		<pubDate>Thu, 30 Jun 2005 17:40:55 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Internet]]></category>
		<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://marques.cx/wordpress/?p=547</guid>
		<description><![CDATA[A Netcabo (ainda) n&#227;o aderiu ao VoIP por raz&#245;es de pol&#237;tica interna da PT, mas o Sapo Messenger j&#225; tem &#193;udio e V&#237;deo. Funciona com protocolos standard (SIP et all) ou &#233; propriet&#225;rio? Mais um concorrente ao Skype? No futuro, poder&#225; vir a ter liga&#231;&#227;o ao PSTN? Tem crypto? E cliente para Mac, nunca ter&#225;? [...]]]></description>
			<content:encoded><![CDATA[<p>A Netcabo (ainda) n&atilde;o aderiu ao VoIP por raz&otilde;es de pol&iacute;tica interna da PT, mas o <a href="http://messenger.sapo.pt/artigos/573818/beta.html">Sapo Messenger j&aacute; tem &Aacute;udio e V&iacute;deo</a>. Funciona com protocolos standard (SIP et all) ou &eacute; propriet&aacute;rio? Mais um concorrente ao Skype? No futuro, poder&aacute; vir a ter liga&ccedil;&atilde;o ao PSTN? Tem crypto? E cliente para Mac, nunca ter&aacute;? :)</p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Skype Meetings</title>
		<link>http://blog.marques.cx/2005/03/11/skype-meetings/</link>
		<comments>http://blog.marques.cx/2005/03/11/skype-meetings/#comments</comments>
		<pubDate>Fri, 11 Mar 2005 01:02:59 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://marques.cx/wordpress/?p=493</guid>
		<description><![CDATA[Perten&#231;o a uma associa&#231;&#227;o em que foi agendada uma reuni&#227;o para as 22h00 a 130km de onde estou f&#237;sicamente. Normalmente diria que n&#227;o podia ir ou sugeria que fosse adiada para outro dia. J&#225; n&#227;o &#233; necess&#225;rio. Tanto em minha casa como no lugar da reuni&#227;o existe uma liga&#231;&#227;o &#224; Internet com uma velocidade de [...]]]></description>
			<content:encoded><![CDATA[<p>Perten&ccedil;o a uma associa&ccedil;&atilde;o em que foi agendada uma reuni&atilde;o para as 22h00 a 130km de onde estou f&iacute;sicamente. Normalmente diria que n&atilde;o podia ir ou sugeria que fosse adiada para outro dia. J&aacute; n&atilde;o &eacute; necess&aacute;rio. Tanto em minha casa como no lugar da reuni&atilde;o existe uma liga&ccedil;&atilde;o &agrave; Internet com uma velocidade de upstream suficiente para corrermos uma aplica&ccedil;&atilde;o de VoIP sem problemas. De um lado, o meu iBook, do outro um PowerBook. A primeira id&eacute;ia foi usar o <a href="http://www.apple.com/ichat/">iChat</a>, pela qualidade de voz e facilidade na comunica&ccedil;&atilde;o. No entanto, optamos por usar <a href="http://www.skype.com/">Skype</a> porque a qualidade de voz era melhor do que a do iChat. Da &uacute;ltima vez que experimentei o Skype em Mac, a qualidade de voz era sofr&iacute;vel e tinha instabilidade na rede. A reuni&atilde;o durou mais de uma hora e eu conseguia ouvir perfeitamente as 6 pessoas do outro lado e elas ouviam-me perfeitamente. A liga&ccedil;&atilde;o do Skype durou a reuni&atilde;o toda, sem falhas. Se o microfone estivesse mesmo no centro da mesa e fosse bi-direcional, tinha sido perfeito. Se o Skype com suporte a Video n&atilde;o for apenas hype, era a cereja no bolo para ter uma solu&ccedil;&atilde;o port&aacute;til de VideoConfer&ecirc;ncia/Reuni&otilde;es para v&aacute;rias plataformas (uma coisa que o iChat j&aacute; faz apenas para Mac). O mais interessante, &eacute; que podia estar a 130km, no Brasil, Estados Unidos ou Jap&atilde;o e muito prov&aacute;velmente a experi&ecirc;ncia seria igual. O VoIP &eacute; muito mais que fazer chamadas pela Internet de borla, ou mais baratas. &Eacute; a presen&ccedil;a e a qualidade da voz que faz a diferen&ccedil;a. Ainda n&atilde;o faz muito tempo em que as solu&ccedil;&otilde;es de videoconfer&ecirc;ncia vendidas pelas Telcos eram extremamente caras, se imaginarmos o que &eacute; era os custos de comunica&ccedil;&atilde;o de uma sala em Tokyo a falar com outra em Londres. Agora &eacute; para as massas. Basta um download do Skype, iChat ou outro software e um bom microfone e talvez uma c&acirc;mara. Welcome to the Revolution.</p>
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		<item>
		<title>Skype Protocol Analysis</title>
		<link>http://blog.marques.cx/2005/01/22/skype-protocol-analysis/</link>
		<comments>http://blog.marques.cx/2005/01/22/skype-protocol-analysis/#comments</comments>
		<pubDate>Sat, 22 Jan 2005 01:17:13 +0000</pubDate>
		<dc:creator>Fred</dc:creator>
				<category><![CDATA[Crypto]]></category>
		<category><![CDATA[Tech]]></category>
		<category><![CDATA[VoIP]]></category>

		<guid isPermaLink="false">http://marques.cx/wordpress/?p=465</guid>
		<description><![CDATA[Já que o Skype P2P VOIP Protocol foi reverse-engineered, que tal fazer uma biblioteca para o gaim e automágicamente uma série de IM Clients passarem a suportar Skype? Integração, integração. O problema são os Codecs (iLBC, que é um standard do IETF mas o iSAC parece ser proprietário) de uma tal de GlobalIPSound. Watch Pulver [...]]]></description>
			<content:encoded><![CDATA[<p>Já que o Skype P2P VOIP Protocol foi <a href="http://www.cs.columbia.edu/%7Elibrary/TR-repository/reports/reports-2004/cucs-039-04.pdf">reverse-engineered</a>, que tal fazer uma biblioteca para o gaim e automágicamente uma série de IM Clients passarem a suportar Skype? Integração, integração. O problema são os <a href="http://www.globalipsound.com/solutions/solutions_Codecs.php">Codecs</a> (iLBC, que é um <a href="http://www.ilbcfreeware.org/">standard do IETF</a> mas o iSAC parece ser proprietário) de uma tal de GlobalIPSound. Watch <a href="http://www.pulver.com/communicator/geekzone.html">Pulver Communicator</a>.</p>
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		<slash:comments>3</slash:comments>
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