FaceTime is a really interesting move coming from Apple on their recently launched iPhone4. It is a mobile video telephony service which runs over IP, which by now probably have had more video calls done than mobile video calls done on all other existing handsets in the world in the same period of time. Instead of spending my time thinking of what else to write about this new service, here are a few interesting posts that I have found in
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By Tsahi Levent-Levi | August 16th, 2010 | Filed under Clients, Technology
Apple’s FaceTime is now a fact. And by the success Apple had with the iPod and in recent years the iPhone, it is bound to change the market – maybe not the end users one, but definitely the handset vendors, who by now are looking for their own solutions to this problem. I’ve seen a bunch of webinars, whitepapers and other articles about how FaceTime-like services can be integrated by other handset vendors. Usually, these resources focus on a single
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By Tsahi Levent-Levi | August 9th, 2010 | Filed under Technology
In our “hidden challenges in developing HD video telephony products” webinar there was a really active Q&A session. As I promised after the webinar, I will be covering a few of the questions that were asked here at a bit more length. The first group of questions I want to tackle are those concerning H.323 and SIP: How important is H.323 for video telephony vs. SIP? Which one should I use? Using SIP and H.323 is a
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By Tsahi Levent-Levi | July 28th, 2010 | Filed under Standardization
Ever asked yourself when will video calling or even voice calling become something prevalent over the internet? I am afraid that the answer is “not so soon”. For this to happen, there are two distinct technologies that come to play: HTML5 (which is still in its early days) and Flash (which is installed on most web browsers worldwide). HTML5 It seems like the two missing pieces to get video calling going in a browser is having the ability to receive
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By Tsahi Levent-Levi | July 5th, 2010 | Filed under Technology
TrendChip Technologies Corp., a Taiwanese company, has around 20% market share when it comes to ADSL CPE chipsets. Today, these access devices can also support VoIP, and for that RADVISION offers a few solutions – one of them is the Multimedia Terminal Framework (MTF), which TrendChip is licensing. When you couple ADSL with VoIP, it usually also gets a new name – either IAD or ATA. As TrendChip officially announced their new line of IAD solutions, with a warm reference
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By Tsahi Levent-Levi | June 10th, 2010 | Filed under Technology
If I had only known how much noise my Google Jingle/SIP post would make, I would have written it sooner. But then again, you can never really know which posts will get people talking. I had multiple discussions about this subject the day the post was published – on my blog as well as on Twitter. It seems to me that there is something that I missed and I feel it’s necessary to say here: Server-side interworking SUCKS. Interworking? Interworking
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By Tsahi Levent-Levi | December 7th, 2009 | Filed under Standardization, Technology
It’s funny how things work out. I remember a few years ago, while working on our H.323 stack, that SIP was starting to make some noise. Cool people started talking about it as if it was the best thing out there – way better than that old and clucky H.323 thingy. The sad truth of the evolution of protocols The Dark Ages Well, guess what? Both protocols started at about the same time, which some people regard as “the
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By Tsahi Levent-Levi | November 26th, 2009 | Filed under Standardization
XMPP lovers out there – it’s time to pack your things and head home. It seems like SIP has won the battle for VoIP dominance. Don’t come complaining to me – Google is to blame. A few weeks ago we were all looking for Skype to step up to the plate, scoop Gizmo5 and save their asses from the patent issues by giving them a SIP infrastructure. Didn’t happen. Instead, we are now dealing with a much bigger issue: Google
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By Tsahi Levent-Levi | November 23rd, 2009 | Filed under Standardization
It seems like everywhere you go, checking for standards, there are at least two for the price of one: PAL and NTSC, DVD-HD and Blu-ray. H.323 and SIP. SIMPLE and XMPP. Why can’t we just get along and decide on a single protocol for each task? One ring to rule them all? They used to call it “convergence”. In the distant past, when people were looking for a nicer word for “VoIP”. It meant all types of devices talking
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By Tsahi Levent-Levi | October 1st, 2009 | Filed under Standardization
