Archive for April, 2008
VoIP clients on mobile handsets are just starting to happen. At the same time, Linux is becoming an interesting mobile platform. The problem is, Linux is quite fragmented: Android, LiMo, Qtopia are just a few of the many flavors of the popular freely available open source OS. This is not just a fragmentation of distributions, which is the case today for the desktop and enterprise Linux markets, but rather a fragmentation of user interface (UI) frameworks. The mobile UI
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By Tsahi Levent-Levi | April 28th, 2008 | Filed under Clients
There are times when de-facto standards hinder the adoption and use of services. This is the case with 3G-324M and video ring-back servers. What’s 3G-324M? 3G video telephony uses a protocol called 3G-324M. This protocol in turn, uses another protocol called H.245 for call control - with H.245, handsets signal what features and capabilities they have and negotiate the media channels that will be used in the call. H.245 includes procedures and message that allow for the opening and closing
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By Tsahi Levent-Levi | April 24th, 2008 | Filed under Standardization
[I’ve had a chat the other day with a colleague of mine, Danny Loeb, who is the Product Manager for our SIP Server Platform. As part of his work, he needs to deal with the multi-core trend and how that changes the architecture of his product.] Multi-core is all the rage these days. Or at least this is what Intel tell us - almost every month Intel arranges a seminar, workshop, training or some other session about multi-core here in
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By Tsahi Levent-Levi | April 21st, 2008 | Filed under Technology
[Steve Rust, GIPS VP of Business Development was kind enough to provide his views on call quality and what that means on the audio side for this blog and its readers.] If you live in the United States you may have seen a television advert for Verizon where a guy wanders around the country to gauge how good his cell phone service is in different places. His tagline: “Can you hear me now?” is well recognized. Vonage is
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By Tsahi Levent-Levi | April 17th, 2008 | Filed under Technology
No company today is capable of developing its products in-house without using 3rd party software. In most cases the process starts from outsourcing the operating system itself, continues with outsourcing specific protocol stacks and user interface engines, etc. These come from vendors which are sometimes called ISVs (Independent Software Vendors), middleware vendors or various other types of manufacturers.I came across Åse Stiller’s guest post on VisionMobile, where he recommends vendors build an end-to-end flowchart of how source codes of their
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By Tsahi Levent-Levi | April 14th, 2008 | Filed under Technology
In the past month I have traveled the world: mostly Asia and Europe; meeting with over 30 companies. All engineering companies, some customers and others prospects. Different countries. Different mindsets. Different cultures. Different beliefs. Argentinean tango Photo: Alexander Zabara The intensity of it made me aware of the delicate Argentinean tango between vendors. Argentinean tango requires a lot of synchronization between the two dancers. The man leads the dance, deciding on which steps to make, building the choreography of the
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By Tsahi Levent-Levi | April 10th, 2008 | Filed under Technology
Can SIP be used for consumer market devices or will it only exist in the enterprise domain? This seems like an easy question to answer - surely it is suitable for consumers as well. I met with a customer last month who is working on a videophone consumer product. Their company is specifically looking for a proprietary signaling protocol. The reason for this is: SIP is good only for the enterprise market I know for a fact that
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By Tsahi Levent-Levi | April 7th, 2008 | Filed under Clients, Technology
IMS enables the speedy creation and deployment of new services (at least on paper). As such, it has been adopted as the architecture for next generation networks - this is true for mobile, fixed, wireless and cable networks. An important aspect of IMS is security, but I have a feeling that like current VoIP deployments, security is somewhat overlooked. On its lowest level, IMS security requires IPsec - this encrypts and secures the actual IP packets sent over the network.
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By Tsahi Levent-Levi | April 3rd, 2008 | Filed under Technology
