Category Archives: SIP

H.323 versus SIP: An (un)objective Comparison

By Kfir Pravda | Published: September 18, 2007
By Tsahi Levent-Levi I came across an interesting comparison between H.323 and SIP in a Cisco related blog. They make a pretty good technical analysis, but the comparison lacks in its completeness. Both H.323 and SIP are used today for VoIP, and they are considered interchangeable solutions. The comparison made covers the following issues: Philosophy [...]
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IMS, 3GPP and IETF: A standardization complexity

By Kfir Pravda | Published: September 3, 2007
By Tsahi Levent-Levi How do we get those specifications for IMS? In a complex way. It started off as a set if requirements for a Next Generation Network (NGN). The 3GPP wanted an all-IP network for its mobile infrastructure, calling it IMS (IP Multimedia Subsystem). As there’s no need to reinvent the wheel, the 3GPP [...]
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IMS and access

By Kfir Pravda | Published: June 11, 2007
By Tsahi Levent-Levi Let’s explore the issue of access (how IMS clients register on the network and gain access to services) in the world of IMS. Today, the way this is done over UMTS is simply by using the USIM (that small card hiding behind the battery of your handset. You know; the little bugger [...]
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It’s always the same – Standards, Interoperability and Expertise

By Kfir Pravda | Published: March 14, 2007
By Anatoli Levine I’m very excited to be the first to welcome you to the IMTC Blog! As a popular saying goes, it is hard to teach old dogs the new tricks. IMTC is 14 years old, so in the terms of age technology, it is quite an honorable age. A lot of young engineers [...]
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To Standard or not to Standard

By Kfir Pravda | Published: March 1, 2007
By Kfir Pravda So you gathered a bunch of telecom freaks, rented a basement, and saved some budget for cold Pizza. You are going to conquer the world with your amazing application that changes the way people consume media and communicate – forever. Chambers is going to beg you for a job, and the guys [...]
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