Presence is always positioned as the key to unified communications (UC) - at the very heart of UC is the ability to discern the current status of people and resources. Which protocol will be the one used to power Presence? SIMPLE or XMPP? XMPP XMPP stands for “Extensible Messaging and Presence Protocol”. It is a streaming based protocol that routes XML messages between entities. It is mainly used for presence and instant messaging although other uses for it exist
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By Tsahi Levent-Levi | July 17th, 2008 | Filed under Standardization
Everything today is High Definition (HD). Whether you’re talking about televisions, projectors, video conferencing or even voice calls - the latest and greatest is high-definition capable. That said, high definition is really complex to deal with, not just in terms of bandwidth requirements, but in terms of processing power - especially if we’re dealing with visual communications. The challenge Have you ever tried watching a movie encoded in high definition format on your laptop? Assuming you have a single
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By Tsahi Levent-Levi | July 10th, 2008 | Filed under Technology
This post is better suited for our Video Over Enterprise blog, but this should be a good lesson to all of us in the VoIP market. For the past several years, our company has been investing in VoIP infrastructure. Today, I am capable of making video calls and joining audio and video conferences from practically everywhere - from meeting rooms to my work station, my laptop and even my mobile handset. Or as Sagee would say - “The shoe-maker does
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By Tsahi Levent-Levi | June 30th, 2008 | Filed under Technology
Last week, Paul Jones explained on VoIP Survivor the basic concepts behind AMS. The name might ring a bell to those familiar with IMS, but there is no real connection (besides the unfortunate use of a similar acronym). While IMS is an ongoing work, AMS is just beginning. There are many people out there engaged today in one way or another with IMS. They come from different companies and participate in various organizations
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By Tsahi Levent-Levi | June 5th, 2008 | Filed under Standardization
It has been rumored that the new 3G iPhone features a front facing camera. Assuming this is true, the camera will be used for video calling. An important question is what protocol will be used for the video calls? I have written a guest post at Smith on VoIP blog regarding the difference between 3G-324M and SIP regarding mobile video telephony. In that post I explained that currently mobile video telephony (on handsets) is made possible using 3G-324M. SIP, on
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By Tsahi Levent-Levi | May 26th, 2008 | Filed under Clients, Standardization
[The ITU have started working on a standard called the Advanced Multimedia System, or AMS. It is a communications protocol intended to solve some of the issues that plague today's protocols and also enable functionality that is not easily achievable with current systems. I have asked Paul Jones, the rapporteur for the AMS expert group to provide some of his insights on this "standard under construction."]One of the exciting things about the technology industry is that technology is constantly changing
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By guest | May 22nd, 2008 | Filed under Standardization
Once a year, RADVISION’s TBU division holds a road-show in Asia Pacific. In these events, we travel between different countries, meeting clients and holding seminars. Our road-show for 2008 starts today. Seminar in Taipei during the 2007 road-show Now, that the IMTC SuperOp 2008 event is over, it is time to look forward on what will happen in the next two weeks. The road-show is a very exhausting event - it spans four different countries, usually in less than two weeks. In each country, besides the frantic runs from one meeting to another there is a seminar. During the seminar we present the various market needs of the industry along with our solutions - all this is “seasoned” with live demonstrations. This year’s theme is “Development for innovative multimedia application for IMS/NGN”, in which we cover market trends, relevant protocol stacks, client and server frameworks and testing tools. The seminar is relevant for companies who are developing VoIP communication products. In the next two weeks, we will be traveling around Asia, with countries such as Japan, China, Korea and Taiwan on our tour this time. If you are around, you are hereby invited. Just drop me a message.
By Tsahi Levent-Levi | May 19th, 2008 | Filed under Technology
Security is always overlooked when it comes to VoIP. There are those who feel that security is essential and others who think security is overrated. The truth lies somewhere in the middle. If we need security, we need to decide against what.Here are 4 of the biggest threats in the world of VoIP where it comes to security - this is why we really need to take a good hard look at how we deploy our networks. 1. SPIT (Spamming)
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By Tsahi Levent-Levi | May 15th, 2008 | Filed under Technology
[The IP based services such as VoIP (with or without IMS) run over open IP networks. As such, they are susceptible to security threats similar to those in the Internet. As VoIP communications becomes widely used, the security level on it becomes essential. In this guest post, Rasa Siegberg a Senior Systems Engineer from SafeNet provides his insights to VoIP and security.] The Great IP Migration The venerable voice communications industry is undergoing one of the most significant evolutionary steps
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By guest | May 8th, 2008 | Filed under Technology
A lot of reviews have been done on Office 2007 - this is not going to be one of them. I just had the questionable opportunity of working with Microsoft Office 2007. It can be a very frustrating experience to anyone used to previous Office versions. Office 2007 can serve as a great lesson on how to plan new versions - especially when the customers are engineers. Our company has just migrated to Office 2007 this week. It has
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By Tsahi Levent-Levi | May 5th, 2008 | Filed under Technology
