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    Easy SIP-ing

    Written by

    Wayne Rash
    Published September 29, 2004
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      The beauty of SIP (Session Initiation Protocol) is that its a real standard. Unlike earlier IP telephony standards such as H.323 that were more notable in their exceptions and proprietary extensions, SIP devices are designed to work together. Even better, for the most part they do.

      For example, Pingtel Corp.s PBXes are designed to work with any SIP-compliant phone. In fact, the company has spun off its handset division and tells integrators that they can select any SIP-compliant handset that meets the needs of their clients and gives them a good profit margin.

      While it pays to do some testing before you leap into a full-scale proposal using phones and a PBX that you havent tried, you can be fairly certain that putting an SIP phone into a network with an SIP PBX will work.

      Still, there are a number of caveats. Some SIP phones may have some advanced features that are only available when used with PBXes from the same manufacturer. However, other SIP devices will usually work just fine, and if youre trying to keep costs under control, you can usually find ways to combine the product mix.

      Because SIP is an immature standard there are frequently differences in the way it is implemented. This means that you need to check the details to make sure the product you want to use will do what you want it to do. But that doesnt alter the fact that you at least have the opportunity to integrate a system that does something close to what you have in mind at a competitive cost.

      This, of course, is why so many PBX manufacturers are shipping SIP products. They know that this standard is picking up a good head of steam. According to Neal Shact, CEO of < a href=”http://www.communitech.com”>CommuniTech Inc., an Elk Grove Village, Ill., telephony wholesaler, its paralleling the growth of the open-source community. And in fact, theres a lot of overlap with open-source PBX products based on SIP already in the market.

      Even with all of the caveats, and even with the fact that the standard is sure to grow as it matures, SIP already provides great flexibility for integrators. Even better, an SIP solution, despite its limitations, is much more likely to deal with the future than are VOIP products rooted in the past.

      Check out eWEEK.coms VOIP & Telephony Center at http://voip.eweek.com for the latest news, views and analysis on voice over IP and telephony.

      Wayne Rash
      Wayne Rash
      https://www.eweek.com/author/wayne-rash/
      Wayne Rash is a content writer and editor with a 35-year history covering technology. He’s a frequent speaker on business, technology issues and enterprise computing. He is the author of five books, including his most recent, "Politics on the Nets." Rash is a former Executive Editor of eWEEK and a former analyst in the eWEEK Test Center. He was also an analyst in the InfoWorld Test Center and editor of InternetWeek. He's a retired naval officer, a former principal at American Management Systems and a long-time columnist for Byte Magazine.

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