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  <title>Aswath Weblog</title>
  <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/" />
  <modified>2008-07-05T22:11:46Z</modified>
  <tagline>Musing on telecommunications industry and other sundries</tagline>
  <id>tag:www.mocaedu.com,2008:/mt//1</id>
  <generator url="http://www.movabletype.org/" version="2.65">Movable Type</generator>
  <copyright>Copyright (c) 2008, aswath</copyright>
  <entry>
    <title>Why IAX is Immune to NAT Traversal Problem?</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000367.html" />
    <modified>2008-07-05T22:11:46Z</modified>
    <issued>2008-07-05T18:11:46-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.367</id>
    <created>2008-07-05T22:11:46Z</created>
    <summary type="text/plain">The general perception is that unlike SIP, IAX does not suffer from NAT traversal problem. Claims along this line are routinely made and every time I encounter such a claim I will scratch my head and will do some fact...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>VoIP</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>The general perception is that unlike SIP, IAX does not suffer from NAT traversal problem. Claims along this line are routinely made and every time I encounter such a claim I will scratch my head and will do some fact checking to confirm my understanding is correct. The latest example of such a claim was recently made by <a href="http://macvoip.com/stn/?p=666">Ted Wallingford</a> as part of his review of a SOHO PBX from Jazinga. It is informative to analyze how IAX handles (“does not suffer” is not a correct characterization) NAT traversal. This is topical because Adobe has announced that they are planning to support <a href="http://justin.everett-church.com/index.php/2008/05/23/astrop2p/">UDP based media streaming in Flash 10</a> and I suspect that they are using the same methodology that IAX uses. In this post I argue that either of the schemes falls within ICE framework.</p>]]>
      <![CDATA[<p><a href="http://www.ietf.org/internet-drafts/draft-guy-iax-04.txt">IAX specification</a> itself claims that NAT traversal is much simpler because “IAX also uses the same UDP port for both its signaling and media messages, and because all communications regarding a call are done over the same point-to-point path”. This can not be the full explanation. If so, then SIP could also decide to use a standard UDP port for media and realize the same benefit. Consider the case of an end-point that is behind a NAT. Even though that end-point will use the well-known port 4569 for IAX, there is no guarantee that NAT will allocate the same port number for external communication. So how will an external end-point reach this end-point? It is clear that such end-points need to be aided by an external peer, otherwise known as “server”. Since this server will handle the media packets as well, it is essentially acting like a TURN server. Involving a TURN server for the duration of the call is inefficient. Recognizing this, IAX specification has developed “Call Path Optimization” (Section 6.5)procedure. According to this procedure, the IAX server will request the two end-points to exchange media directly between themselves by providing the IP addresses of the end-points. Since the server is providing the IP addresses, they are “server reflexive addresses” that ICE uses. We know that there are instances when these server reflexive addresses will not be reachable as in the case when the two end-points are behind the same NAT. Thus the procedure specified in the IAX specification is sub-optimal to IAX. Of course they can update their procedure to conform to ICE. But the point remains that IAX addresses NAT traversal problem not because it uses the same UDP port for media and signaling, but because it uses a server that can act as a TURN server and that server facilitates an ICE-like procedure.</p>

<p>From the description of Flash 10, it is clear that they are also doing a similar thing. But it is not clear whether they are following the full ICE framework or a subset. It is worthing looking into it once we have additional information.</p>]]>
    </content>
  </entry>
  <entry>
    <title>EnThinnai at LaunchPad</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000366.html" />
    <modified>2008-05-08T07:28:46Z</modified>
    <issued>2008-05-08T03:28:46-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.366</id>
    <created>2008-05-08T07:28:46Z</created>
    <summary type="text/plain">I e submitted EnThinnai for Enterprise 2.0 LaunchPad competition. Please consider voting for me by visiting their site. The pitch is embedded below:...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Sundry</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>I e submitted EnThinnai for Enterprise 2.0 LaunchPad competition. Please consider voting for me by visiting their <a href="http://launchpad.enterprise2conf.com/">site</a>. The pitch is embedded below:</p>

<p><object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/HCj2tnkUxYA&hl=en"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/HCj2tnkUxYA&hl=en" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object></p>]]>
      
    </content>
  </entry>
  <entry>
    <title>Comments on ecomm2008</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000365.html" />
    <modified>2008-04-15T09:29:19Z</modified>
    <issued>2008-04-15T05:29:19-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.365</id>
    <created>2008-04-15T09:29:19Z</created>
    <summary type="text/plain">Last month, a week before VON there was another conference - ecomm2008. Last week the slides used by the speakers were putup on slideshare.net. I tweeted my thoughts as I reviewed the presentations. The following is a compendium of those...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>IP Communications</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>Last month, a week before VON there was another conference - ecomm2008. Last week the slides used by the speakers were putup on slideshare.net. I tweeted my thoughts as I reviewed the presentations. The following is a compendium of those tweets.</p>]]>
      <![CDATA[<p><bl><li>Reviewing eComm presentations;so few End based solutuons</li><li>ecomm2008/millicomp: What would you do with an always on/connected millicomp in your pocket? unifiedcomm, ofcourse</li><li>I disagree with ecomm2008/Ernst that Telcos as OpenID providers have a competitive advantage</li><li>ecomm/iskoot: use ip for signaling and carry voice on pstn http://snurl.com/245l5; i suggested in an old blog post that is catching fancy</li><li>Look at Ribbit's SW architecture and its complexity. no wonder they are a phone compnay. Are all thoses needed?http://snurl.com/245mg</li><li>Won't incumbents charge calls to inum as overseas call thereby reducing its attractiveness? http://snurl.com/245ow</li><li>Is Embarq a client of STL Partners? I can see the effects http://snurl.com/245rs</li><li>Shai talks about the need for navigating the web and then talking over PSTN http://snurl.com/245tw ...</li><li>toktumi talks about integrating PC and pnone http://snurl.com/245u2 ...</li><li>Trolltech talks about coming phone revolution in 2009 http://snurl.com/245u6 ...</li><li>Embarq announces cordless phone with IP interface; Verizon Home hub is also a comparable device ...</li><li>Promises of VoIP (actually of ISDN) - Happy Days - are here</li><li>vapps touts wideband conf bridge to be disruptive at 6c/m. Need to look into jvoicebridge. http://snurl.com/245yg</li><li>Luca talks about Hictu - 60 sec video blogging. Now Flickr has 90 sec. It is catching on http://snurl.com/245zv</li><li>If devices will have both phone and data connections, then is there a need for mashups? http://snurl.com/24640</li><li>Voxeo/ecomm2008: web tech, platform, SIP&inspiration=exciting 2.0 apps. http://snurl.com/24efk. Except we don't need SIP</li><li>standre/ecomm:We are building realtime Internet with open stds,innovative edges but no telcos. But there are dragons http://snurl.com/24eia</li><li>EnThinnai handles standre dragons in its own way. Will take a regular blog post</li></bl> <br />
</p>]]>
    </content>
  </entry>
  <entry>
    <title>Now Tweeting as @aswath</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000364.html" />
    <modified>2008-04-15T09:08:13Z</modified>
    <issued>2008-04-15T05:08:13-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.364</id>
    <created>2008-04-15T09:08:13Z</created>
    <summary type="text/plain">For the past few days I have been tweeting as @aswath. Given its nature, I am finding that I am able to share more thoughts and listen to more people. I hope you will follow me there. But I will...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Personal</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>For the past few days I have been tweeting as @aswath. Given its nature, I am finding that I am able to share more thoughts and listen to more people. I hope you will follow me there. But I will continue to post here at my historic rate.</p>]]>
      
    </content>
  </entry>
  <entry>
    <title>What Comes After AORTA</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000363.html" />
    <modified>2008-04-01T03:28:39Z</modified>
    <issued>2008-03-31T23:28:39-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.363</id>
    <created>2008-04-01T03:28:39Z</created>
    <summary type="text/plain">This morning Alec Saunders talked about the effects of pricing plans in wireless data market. His point was aggressive pricing will induce increased use. In that context he mentioned a term introduced by Mark Anderson. Mark claimed that the chief...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>IP Communications</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>This morning <a href="http://saunderslog.com/2008/03/31/talking-turkey-on-canadian-data/">Alec Saunders</a> talked about the effects of pricing plans in wireless data market. His point was aggressive pricing will induce increased use. In that context he mentioned a term introduced by Mark Anderson. Mark claimed that the chief benefit of broadband internet is Always On Real Time Access (AORTA). Alec elaborates: “Not the fact that broadband is fast, but that it's always up, which means that you can have access to the 'net instantaneously.” But having an access to the net is only half the battle.</p>]]>
      <![CDATA[<p>It is equally important that internet peers must be able to access the application clients running in local machines. In the wired world this manifests itself as NAT/FW traversal problem. It is a generally accepted solution for the local clients to maintain connection with an external server which proxies traffic (at least initially) from other peers. The problem is different in the case of mobile internet. Normally NAT/FW traversal problem is not there in the mobile environment. But mobile devices consume a large quantity of radio resource to maintain the access link to the ‘net. This means that it is much preferable to design pull-style applications. But many popular applications like email require servers to push information. Take a look at the figure taken from a <a href="http://www1.alcatel-lucent.com/com/en/appcontent/opgss/CMO2888080110_9900WNG_bro_lr_tcm228-1401931635.pdf">whitepaper</a> published by Alcatel-Lucent.<br />
<img alt="AL 9900.jpg" src="http://www.mocaedu.com/mt/archives/images/AL 9900.jpg" width="1077" height="533" border="0" /><br />
Even though the amount of bandwidth consumed by email application is very small, the corresponding airtime consumed is very large. This is a sleeper problem with the approach Blackberry has taken. Microsoft has taken a different approach to push email. The Exchange server sends an SMS which prompts the mobile device to pull newly arrived email. Since there could be delay in the delivery of SMS, sometimes Microsoft’s approach may not behave like push email. A better approach might be for the Exchange server to send a notification to a designated server at the Mobile Carrier, which in turn can send a notification using the “paging channel”. This is the same channel used to send the notification for an incoming call. So the next step to AORTA is for the carriers to provide a service whereby mobile subscribers can designate the application providers who can send paging indications for events associated with web services. This service is worthwhile even if the carriers charge for such notifications.</p>]]>
    </content>
  </entry>
  <entry>
    <title>Replacing IVR Systems</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000362.html" />
    <modified>2008-03-29T18:28:21Z</modified>
    <issued>2008-03-29T14:28:21-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.362</id>
    <created>2008-03-29T18:28:21Z</created>
    <summary type="text/plain">I am certain that each one of us have horror stories relating to IVR maze. To ease this, many IVR systems allow look-ahead dialing. But then many administrators ask us to listen to all the choices before selecting one because...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Telephony</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>I am certain that each one of us have horror stories relating to IVR maze. To ease this, many IVR systems allow look-ahead dialing. But then many administrators ask us to listen to all the choices before selecting one because thy have changed recently. Of course they do not say how recently the menu choices have been changed. All in all, IVR is a necessary evil because the user has limited way to signal the far-end. Recently <a href="http://www.shaiberger.com/?p=67">Fonolo</a> has come up with a crazy like a fox scheme to overcome this tedious interaction.</p>]]>
      <![CDATA[<p>Apparently, they utilize multiple techniques to traverse large companies’ IVR systems to map the menu tree and make them available in Fonolo’s website. Users can visit their website, select the menu tree corresponding to the company they are interested in and identify their choice. Then Fonolo will connect the users to the company’s IVR system, navigate the IVR menu choices and land on the intended point. This has received lots of positive attention in the blogosphere. Of course some have pointed out a practical difficulty. There are times, IVR system will collect private information and some users may be reluctant to pass it on to Fonolo. But my objection is more fundamental. Fonolo has inserted itself between me and the enterprise I am interested in. This very fact may be of value to Fonolo and can claim that it is entitled to market this information because they are providing a free service.</p>

<p>Just because I take exception to their solution does not mean that the pain point they address is not real. My suggestion to IVR designers is to recognize this and simplify those callers who have access to Internet. A preferred approach could be for these enterprises to produce IVR map on their own website. Then internet connected callers can first visit this website, traverse the IVR menu tree just like Fonolo users will do. Once they reach the desired point, the site can generate a string of digits. Then a caller has to dial the standard number and enter the generated number string. The IVR system can correlate the entered digits to the selection made on the website and route the call accordingly. This way, we can augment the limited signaling capability available in PSTN with the rich UI available through the web browser. This is what “Intelligent at the End” will suggest.</p>]]>
    </content>
  </entry>
  <entry>
    <title>Distributed Social Directory is the Real Trouble</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000361.html" />
    <modified>2008-03-29T16:51:14Z</modified>
    <issued>2008-03-29T12:51:14-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.361</id>
    <created>2008-03-29T16:51:14Z</created>
    <summary type="text/plain">I posted the following entry at EnThinnai blog. Please visit there to post your comments....</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>IP Communications</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>I posted the following entry at <a href="http://blog.enthinnai.com">EnThinnai blog</a>. Please visit <a href="http://blog.enthinnai.com/2008/03/29/distributed-social-directory-is-the-real-trouble/">there</a> to post your comments.</p>]]>
      <![CDATA[<p>Daniel Berninger periodically writes in GigaOm under an evocative banner called “Here Comes Trouble”. These posts follow a familiar pattern: Historically the business model (invariably referring to the traditional telecoms) has been to have a control over the users, usually aided by monopolistic and regulatory environments; given the distributed nature of IP Communications, such control is not feasible; so the telecoms are under threat by upstarts. And here is the clincher. Almost invariably he will conclude with one of the upstarts will end up having full control. Even though he invokes distributed nature of IP, he replaces one ubiquitous entity with another. He has done the same thing with his <a href="http://gigaom.com/2008/03/28/here-comes-trouble-a-social-directory/">recent post</a> where he seems to suggest that the traditional telephone directory will be replaced by a “social directory” created by merging the telephone directory with the social networking model. Not only that. His concluding sentence is noteworthy: “However, Google’s revenue represents less than a third of what the declining telephone directories generate in the U.S. alone. Riches await the infocom company that achieves gatekeeper status for the Internet’s communications applications.” Let me repeat for emphasis. He thinks that there is an opportunity for a gatekeeper in IP Communications. EnThinnai is betting against that.</p>

<p>Dan suggests that traditional directories and their online versions can not handle currently available multiple communication modes. So he suggests that the optimal solution is “a user-generated directory in which individuals own and update their own listing.” EnThinnai, which has been operational for a year, does exactly that. He further states that the access to the directory needs to be restricted. He thinks, “[t]he social directory could implement an invite authentication process like any other social network.” Here again EnThinnai is ahead. EnThinnai users will have the ability to control who can access when and which contact information. However, we disagree that there will be a single or even handful of gatekeepers. We are striving to provide a mechanism for each individual to run their own EnThinnai and control their own directories. We do not just mouth “Intelligent at the End” mantra; we believe in it.</p>]]>
    </content>
  </entry>
  <entry>
    <title>OpenID Providers that Don’t Consume are not Evil</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000360.html" />
    <modified>2008-03-24T22:42:03Z</modified>
    <issued>2008-03-24T18:42:03-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.360</id>
    <created>2008-03-24T22:42:03Z</created>
    <summary type="text/plain">I posted the following at EnThinnai blog. Please post your comments there....</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>OpenID</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>I posted the following at <a href="http://blog.enthinnai.com/2008/03/24/openid-providers-that-dont-consume-are-not-evil/">EnThinnai blog</a>. Please post your comments there.</p>]]>
      <![CDATA[<p>In one of today’s post, <a href="http://www.techcrunch.com/2008/03/24/is-openid-being-exploited-by-the-big-internet-companies/">Michael Arrington</a> takes issue with the big Internet companies for their lack of support for accepting OpenID credentials from others. He argues that “… [they] have made big press announcements about their support for OpenID, but haven’t done enough to actually implement it.” He goes on to say, “Putting my conspiracy theory hat on, it looks to me like these companies want all the positive press that comes from adopting this open standard, but none of the downside. … It’s all gain, no pain.” Even though he quotes Bill Washburn, the Executive Director of OpenID Foundation and David Recordan, the Vice Chair of OpenID Foundation, he uses their equivocal remarks on this matter to admonish these companies “to do what’s right for the users and fully adopt OpenID as relying parties.” I, as an interested person in being a Relying Party, don’t agree with his analysis and for that matter do not share the general perception of the benefits of OpenID.</p>

<p>First a cheap shot: Michael, there are no downsides in being a Relying party and there are no pain points. If anything, OpenID simplifies the lives of Relying Parties. More seriously, the confusion is created by OpenID proponents themselves because they highlight unrealistic benefits.</p>

<p>A relying party that has decided to accept OpenID has no obligation to accept ID issued by one and all ID providers. For example one of the stated reasons for Sun to issue OpenID to its employees is that retailers who would like to give discount to Sun employees can use Sun issued OpenIDs as verification of employment. So it is conceivable that a retailer may decide to accept OpenIDs issued by Sun and nobody else. OpenID is a “Passport” and not a “Visa”. One of the implied casualties is the possibility of Single-Sign-On.</p>

<p>Secondly, there is a general perception that registration procedure is simplified because the Relying Parties could collect profile information from the ID providers. Even though the protocol allows for this exchange of information, there could be external reasons for Relying Parties to explicitly collect them from their users.</p>

<p>These are the top two claimed benefits of OpenID. But many of the OpenID proponents do not emphasize the real benefit of OpenID. We all the time joke that “in Internet, nobody will know you are a dog”. So if a Relying Party is interested in serving senior citizens, then it can look for an opened issued by AARP. If a social network meant for middle schoolers, then it can look for an OpenID issued by school districts. This is the benefit of OpenID. So as a proponent of OpenID, I would like to lobby AARP, AAA and school districts to issue OpenID to its members/students. Then as a Relying Party I will be able to target services to the appropriate audience.</p>

<p>Now let me defend the actions taken by the big Internet companies. As I reasoned earlier, it is not against the protocol for a company to only issue OpenIDs and not accept from others. It is not even detrimental to wider adoption of OpenID. Just this morning <a href="http://saunderslog.com/2008/03/24/squawk-box-march-24/">Alec Saunders</a> (most assuredly a friend and a well wisher) discussed Michael’s post in his daily Sqwakbox. There he mentioned EnThinnai and laments that one of the reasons he is not trying it out is that none of his friends have OpenID. This suggests that as a Relying Party, I will benefit enormously if the Big Internet companies issue OpenID to their members and raise general awareness. What will be my benefit that they also accept OpenIDs from others? I am afraid not much. On the other hand if they talk up OpenID and people have general exposure to it then Alec will not have his reservation. So I would rather advocate the big Internet companies to educate their members of OpenID rather than expend my goodwill on them accepting OpenIDs issued by third parties.</p>

<p>I am passionate about the objectives of EnThinnai and it is not viable without the services of OpenID. I do not care so much as whether other sites accept OpenID or not; but it is imperative that there are enough OpenID issuers and that Internet users have pocketful of OpenIDs so that any two Internet citizens will have a mutually acceptable ID providers.<br />
So if you are an OpenID proponent then i urge you to do the following:<ol><li>Ask any and everyone who provides authentication services to issue OpenID.</li><li>Ask Internet citizens to amass as many OpenIDs as possible.</li><li>Give visibility (not suggesting you heap praise, but offer an objective review) to budding Relying Parties. This is from a personal hurt. Here is EnThinnai, whose service objectives are viable only with OpenID. But not a single OpenID proponent has analyzed or discussed EnThinnai. But there is no end to people talking about Plaxo et. al. who don’r particularly require all that exposure.</li></ol></p>]]>
    </content>
  </entry>
  <entry>
    <title>Legal Interception and IP Communications</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000359.html" />
    <modified>2008-02-18T03:42:00Z</modified>
    <issued>2008-02-17T22:42:00-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.359</id>
    <created>2008-02-18T03:42:00Z</created>
    <summary type="text/plain">Periodically this topic of should we extend legal intercept capability to IP Communications is raised and more often than not the slant of the argument is that IP Communications should be free of any regulatory requirement. Invariably one of the...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>IP Communications</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>Periodically this topic of should we extend legal intercept capability to IP Communications is raised and more often than not the slant of the argument is that IP Communications should be free of any regulatory requirement. Invariably one of the supportive point is that the participants could encode the data exchange thereby thwarting the objective of interception.  It is widely held that Skype’s encryption is the most difficult to break and so Skype is the poster child. <a href="http://skypejournal.com/blog/2008/01/the_bavarian_intercept_proves.html">Phil Wolff</a> reports in Skype Journal that a German company is suggesting that they have developed a capability to infect a target’s PC so that the communication is intercepted in the PC itself and that too before the transmission is encrypted. At least in my reading it looks like Phil is suggesting that the German authorities have signed onto this. But I have my own reservations. First it is not clear whether they can infect stand alone devices. If not, won’t the targets who are professional miscreants use Skype devices, rather than a PC? Second, the infected PC has to transmit the intercepted communication to the LEA at some point. Since the targets can easily monitor the traffic flowing across their router, they can easily infer that they are targets. Once of the CALEA requirement is that the targets shouldn’t be able to discern that they are indeed targets.</p>

<p>In certain cases, the LEAs may not need access such an elaborate setup. It so happened that in a <a href="http://www.newsweek.com/id/72027">recent case</a>, the Italian authorities needed to locate one of the suspects. “Soon after the murder, Guede (the suspect) left Perugia, but he kept checking Facebook for messages from friends. The Communications Police arranged for one of those to contact Guede using Skype from their office, and as the two chatted, the cops traced Guede to a computer in Dusseldorf.”</p>]]>
      
    </content>
  </entry>
  <entry>
    <title>Poetic Justice</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000358.html" />
    <modified>2008-02-07T00:24:33Z</modified>
    <issued>2008-02-06T19:24:33-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.358</id>
    <created>2008-02-07T00:24:33Z</created>
    <summary type="text/plain">&quot;I think that the vision of the early SIP founders has been largely unreal in the SIP world. SIP is typically just used for this mundane trunkling application like the one we have or sending calls between two networks and...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>VoIP</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>"I think that the vision of the early SIP founders has been largely unreal in the SIP world. SIP is typically just used for this mundane trunkling application like the one we have or sending calls between two networks and it is just calls. The vision of multi-modal communications and rich end points has largely failed within the same and I think that a big part of this is that they did not pragmatically just solve basic problems like NAT traversal for example and they also evolved the specification to the point that <b>it is no longer had its light weight appeal</b>." <a href="http://ecommmedia.com/blog/2008/02/jonathan-christensen-skype.html">Jonathan Christensen</a>, General Manager of audio and video, Skype.</p>

<p>From one Jonathan to another: Remember H.323 remarks? What goes around comes around.</p>

<p>By the way, is Skype is really P2P or CS in disguise? Isn’t their NAT traversal derived from the same source as STUN – <a href="http://alumnus.caltech.edu/~dank/peer-nat.html">UDP hole punching</a>? (Read the History section at the bottom of the page.) Is Skype call model different than SIP, which is no different than H.323? Why do I get the feeling that I am listening to politicians promising "change"?</p>]]>
      
    </content>
  </entry>
  <entry>
    <title>&quot;Very Good!&quot;, so said the white man</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000357.html" />
    <modified>2008-01-27T16:32:22Z</modified>
    <issued>2008-01-27T11:32:22-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.357</id>
    <created>2008-01-27T16:32:22Z</created>
    <summary type="text/plain">In today&apos;s Washington Post, there is a story that ostensibly describes Indians&apos; obsession with fair skin. But a telling quote is from Riya Ray, 23, a dark-skinned Indian model: &quot;My pictures are routinely Photoshopped to make me look a bit...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Sundry</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>In today's Washington Post, there is a <a href="http://www.washingtonpost.com/wp-dyn/content/article/2008/01/26/AR2008012601057.html?hpid=moreheadlines">story</a> that ostensibly describes Indians' obsession with fair skin. But a telling quote is from Riya Ray, 23, a dark-skinned Indian model: "My pictures are routinely Photoshopped to make me look a bit lighter -- a lot lighter, actually. But when I work in Britain and France, my color is praised as exotic. It is a two-way trend: Indian models are going abroad, and foreign models are coming here."</p>

<p>Another notable quote in that story is from Lokesh Mishra, general manager of marketing at Woodland Worldwide: "And we are also playing on the typical Indian mind-set that thinks if the white people are wearing our brand, then it must be good."</p>]]>
      
    </content>
  </entry>
  <entry>
    <title>Home iPhone</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000356.html" />
    <modified>2008-01-09T16:53:19Z</modified>
    <issued>2008-01-09T11:53:19-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.356</id>
    <created>2008-01-09T16:53:19Z</created>
    <summary type="text/plain">A skeptical Alec writes about an effort to build a home phone that John Sculley of OpenPeak positioned it as the iPhone for the home phoneline. He thinks such high-end phones have not fared well historically. Past experience suggests to...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Telephony</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>A skeptical <a href="http://saunderslog.com/2008/01/09/the-iphone-for-your-home-phoneline/">Alec</a> writes about an effort to build a home phone that John Sculley of OpenPeak positioned it as the iPhone for the home phoneline. He thinks such high-end phones have not fared well historically. Past experience suggests to him that such phones will be expensive enough to be “out of reach for the average consumer”. Furthermore he says that landline is a dying beast, so there will not be much demand for such phones. I feel that he is a bit quick in dismissing such attempts, even though I have my own reservations about this particular attempt.</p>]]>
      <![CDATA[<p>First of all according to the PC Magazine story Alec references, the initial carrier partner for this phone could be Verizon. Indeed OpenPeak <a href="http://64.233.169.104/search?q=cache:q55U0KYO6y8J:www.openpeak.com/index.php%3Fid%3Dverizon_one_release+openpeak+verizon&hl=en&ct=clnk&cd=1&gl=us">introduced</a> this phone last year in the same CES. That time they revealed that Verizon will market this device as <a href="http://www22.verizon.com/Residential/Broadband/FiosFone/">Fios Fone</a>. Even though Verizon has a web page for this product in their website, I do not see any further development. So Alec may be right that this particular attempt will not go any further.</p>

<p>The phone is very unimaginative in many respects. To begin with the cordless technology that uses 1.9 MHz radio. Instead it should use DECT that can support wideband codecs (it is a VoIP phone as well and not just TDM as Alec seems to suggest). <b>(Update: It is a DECT 6.0 phone, but it is not clear whether it supports a wideband codec.)</b> Next it should support multi-handsets with the base station acts like a rudimentary PBX, which DECT facilitates. This way, each member of the family can have a designated handset and can target ring the handsets. The handsets should have a much bigger screen so as to provide enhanced user experience, like directory based dialing, ease of call control. There is no need to have any browsing and related functionalities at the base station. I have never used the base station at my home. When did you use yours last?</p>

<p>OpenPeak’s phone has a critical flaw. It acts like a service provider’s node, instead of the consumer’s device. A better approach is to market it as a consumer device, treat it as the “central office” and derive features from there without any further dependence on the service provider. This way there is no opportunity to levy any additional monthly fee.</p>

<p>I feel that Alec’s experience notwithstanding, I think such a phone can be built at competitive price. Currently, Costco retails DECT multi-set cordless phones for about $20 per piece (base station is $20, each handset is $20). I would hazard a guess that touch screen will add about $10 to the handset and Ethernet interface and ATA function will add $15 to the base station. But think about it: such a device will really add intelligence to the End and revolutionize both PSTN and VoIP marketplace.</p>]]>
    </content>
  </entry>
  <entry>
    <title>Robert (Scoble) Gandhi?</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000355.html" />
    <modified>2008-01-04T21:05:50Z</modified>
    <issued>2008-01-04T16:05:50-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.355</id>
    <created>2008-01-04T21:05:50Z</created>
    <summary type="text/plain">Yesterday Robert Scoble was in the news more than usual. He used a toll provided by Plaxo to scrape Facebook to retrieve his friends’ data. Since Facebook considers this to be against their Terms of Service, they blocked his account,...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Social Networking</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>Yesterday Robert Scoble was in the news more than usual. He used a toll provided by Plaxo to scrape Facebook to retrieve his friends’ data. Since Facebook considers this to be against their Terms of Service, they blocked his account, but subsequently unblocked it. But before his account was unblocked he took questions from people at his video channel. In a response to a question, he glibly mentioned that yes he has broken the law before, like speeding on the highway and that Gandhi has broken laws as well. Predictably he is getting quite a ribbing for ostensibly equating his action to Gandhi’s civil disobedience movement. As I was listening to his comment, I didn’t take offence as an Indian. From the context it was clear that he was making light his actions and when he was pushed, he wanted to convey breaking law may not be bad in of itself. Now I take exception to his comparison because of his subsequent actions and I want to use this to establish one of my points.</p>]]>
      <![CDATA[<p>Yes, Gandhi broke the laws repeatedly. But only those that he considers them to be immoral. But before breaking the law, he will make it clear to the law makers the reasons why he considers them to be immoral and that he will not obey them. Inevitably, the law makers will punish him for disobeying the law. He will patiently, without resistance undergo the punishment; sometimes imploring his adversaries to levy the punishment accorded by the same immoral law. But alas, Scoble appealed to Facebook to reinstate his account and apparently he has agreed to abide by the condition that he finds objectionable.</p>

<p>Let us hope that this event is equivalent to Gandhi being thrown off the train in South Africa. As a first step, he has joined DataPortability.org. But I want him to start a “<a href="http://en.wikipedia.org/wiki/Mahatma_Gandhi">homespun</a>” movement. After all spinning wheels are available from a few people (including our own <a href="http://www.enthinnai.com">EnThinnai</a>). Let us work together to perfect the wheel. There is no need to be locked within the walled garden. Swaraj now! Swaraj forever!</p>

<p>PS: If you are interested to add your comments, please visit the <a href="http://blog.enthinnai.com/2008/01/04/robert-scoble-gandhi/">original post</a>.</p>]]>
    </content>
  </entry>
  <entry>
    <title>Get Well, Om</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000354.html" />
    <modified>2008-01-04T08:05:40Z</modified>
    <issued>2008-01-04T03:05:40-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.354</id>
    <created>2008-01-04T08:05:40Z</created>
    <summary type="text/plain">Today I came to know that last week Om had a heart attack. But he is recovering fast. I hope he is back at his self soon. He has been a good friend and an early promoter of my writings....</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Personal</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>Today I came to know that last week Om had a heart attack. But he is recovering fast. I hope he is back at his self soon. He has been a good friend and an early promoter of my writings.</p>]]>
      
    </content>
  </entry>
  <entry>
    <title>Happy New Year!</title>
    <link rel="alternate" type="text/html" href="http://www.mocaedu.com/mt/archives/000353.html" />
    <modified>2008-01-01T13:14:44Z</modified>
    <issued>2008-01-01T08:14:44-05:00</issued>
    <id>tag:www.mocaedu.com,2008:/mt//1.353</id>
    <created>2008-01-01T13:14:44Z</created>
    <summary type="text/plain">This is to wish all of “You” a Happy New Year! Last year was an interesting year because of my involvement in EnThinnai. Postings were fewer than usual, but some posts saw more traffic than usual. Thanks for continuing to...</summary>
    <author>
      <name>aswath</name>
      <url>www.whencevoip.com</url>
      <email>aswath@mocaedu.com</email>
    </author>
    <dc:subject>Sundry</dc:subject>
    <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://www.mocaedu.com/mt/">
      <![CDATA[<p>This is to wish all of “You” a Happy New Year!</p>

<p>Last year was an interesting year because of my involvement in <a href="http://www.enthinnai.com">EnThinnai</a>. Postings were fewer than usual, but some posts saw more traffic than usual. Thanks for continuing to read and hope you will find this blog to be of interest in the coming year as well. Thank you.</p>

<p><p><img src="http://www.mocaedu.com/mt/images/blogtraffic2007.jpg" border="0" alt="My Blog Traffic" /></p></p>]]>
      
    </content>
  </entry>

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