The VoIP Survivor blog has been around for over 6 months now. During that time, I have tried to make it an interesting place for people who are working with and around VoIP - be it desktop clients, mobile handsets, or server side solutions. We have also tried to develop more interesting blogs around RADVISION’s fields of expertise. I’d like to take the opportunity and introduce my fellow RADVISION bloggers. Meet the writers The RADVISION blogging community currently consists of
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By Tsahi Levent-Levi | August 25th, 2008 | Filed under Around the net
3G Video Telephony is powered by a protocol called 3G-324M. 3G-324M is circuit-switched based, so everything you send is sent as a single bitstream at a fixed bitrate of 64 kilobits per second. On that single connection, you can send voice, video, data and signaling. Since there’s not a lot of room 3G-324M uses a very efficient multiplexer protocol called H.223. The only problem is that implementing it properly isn’t that easy. For that purpose, RADVISION has developed an efficient
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By Tsahi Levent-Levi | August 21st, 2008 | Filed under Technology
Tim Bajarin from PC Magazine writes about the dawn of visual networking - Sagee on his Video over Enterprise blog is saying that all of the time and I must agree with the conclusions. Video is here. Another one about video going mainstream, this time from No Jitter - I am betting video will happen in all of the three buckets mentioned in this post, and that the key is going to be the ability to mesh them up together. Sam Dean on OStatic asks if Mobile Linux is having difficulties due to Orange ditching Access Linux - I don’t think so. The market is going to consolidate around seven centers of gravity, so the smaller ones are heading a hard time, but Linux will thrive. Nortel just acquired Pingtel. Garrett Smith has an interesting (and probably controversial) analysis on this one.
By Tsahi Levent-Levi | August 20th, 2008 | Filed under Around the net
Going green is all the rage these days. Slowing economy, raising gas prices - just what you need to fuel up video conferencing. When all around us, people are trying to reduce energy use, is there any room for solutions that are power intensive? VoIP seems like a great solution when used for video conferencing, but when used on a mobile handset it might be a different story. I ran by a post in Martin Sauter’s blog, WirelessMoves, where
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By Tsahi Levent-Levi | August 18th, 2008 | Filed under Technology
IntoMobile reports that Samsung also ditched Linux on one of its planned handsets, that after Asus did the same - this is counterintuitive to my thoughts on Linux on mobile, but I still stand by my conclusions - Windows Mobile is going to lose some ground if it doesn’t do something earth shattering soon. UC is not just about communications and it is also overhyped - I totally agree. Up to the point of there’s no such thing as UC. Skype might have a back door for governments to eavesdrop - there’s no security in proprietary protocols, only in open standards. Some shameless self-promotion - we just released our eVident product, which allows companies to test their networks for video deployment readiness.
By Tsahi Levent-Levi | August 11th, 2008 | Filed under Around the net
Last month I asked the question do communication protocols need to be Swiss Army Knives or penknives. I also asked the same question in LinkedIn Answers. The (almost) unanimous answer I got was penknives. The best part of it was actually getting two great acronyms to use for that do-it-all protocol: Steve Michelson suggested GPPTDE: General Purpose Protocol That Does Everything Cedric Mauvielle suggested SAKF: Swiss Army Knife Protocol Cedric believes a SAKF (or a GPPTDE)
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By Tsahi Levent-Levi | August 4th, 2008 | Filed under Protocol stacks
There is no such thing as Unified Communications or Social Media. For that matter, Web 2.0 and Phone 2.0 are also non-existent. And there’s no Presence in TelePresence either. For the last decade, I’ve been a player in these worlds, working on either development or marketing of related building blocks for this industry. During that time, only three things have changed: There’s a lot more bandwidth waiting to be used There’s a lot more processing power There’s more acceptance
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By Tsahi Levent-Levi | July 31st, 2008 | Filed under Technology
Interesting times in the mobile handsets arena. VisionMobile maps the new centers of gravity in this industry. I believe competition will lag behind Apple’s iPhone in their next release as well as copycatting its ideas and designs. Talking about the iPhone - I am thinking of starting a petition to ban iPhone from Google Alerts for 3G video. For the past two weeks I am getting nothing from that service besides iPhone jailbreaks and teardowns. Growing bandwidth and increasing CPU power will change television as we know it. It will also speed up the use of video telephony adoption and quality and this fits well with the trend of multi-core diversification I have written about. You can add to this TiVo’s two new deals with YouTube and Amazon - it’s only the beginning. HD is seen by some as the true promise of VoIP - this is certainly different than the Unified Communications pitch. What happens when you don’t have enough bandwidth though?
By Tsahi Levent-Levi | July 28th, 2008 | Filed under Around the net
There’s no presence in TelePresence. And you know what? There’s also no “unified” or “communication” in UC (Unified Communication). These are just new buzzwords in VoIP town. They are there to replace “video conferencing” and “convergence.” Besides the fact that they are more of the same (maybe better), there’s nothing new under the sun. TelePresence TelePresence is simply better video conferencing. It has higher resolutions (1080p instead of 720p, or CIF if you refer to legacy systems), higher bitrates and
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By Tsahi Levent-Levi | July 24th, 2008 | Filed under Technology
You can do everything with SIP: Voice over IP, video telephony, presence, instant messaging, SMS, MMS and much more. Sometimes it feels like SIP is a protocol invented by a salesman: “Oh, you are looking for a solution that starts the microwave when you get to your driveway after a long day? Sure we have it - SIP!”Last week I wrote about XMPP versus SIMPLE, where both are used for presence and SIMPLE and utilize SIP for its transport. A
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By Tsahi Levent-Levi | July 21st, 2008 | Filed under Protocol stacks, Standardization
