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SIP trunking gaining on T1 lines as companies seek efficiency | Infonectics Research

Posted by Brian Borgman on July 9, 2010

Due to the fact that I couldn’t link directly to the appropriate story on (, below is the info they posted re: SIP trunk deployments.

In my opinion, businesses in the Louisville/Lexington, KY markets need to be extremely cautious with SIP trunk deployment.  With minimal deployments and very pessimistic views from provider engineers on their product offerings, we’ve heard/seen more negative than positive results in our markets

SIP trunking gaining on T1 lines as companies seek efficiency

Infonetics Research ( today released excerpts from SIP Trunking Deployment Strategies: North American Enterprise Survey, part of its Continuous Research Service series of analyst notes and surveys on the enterprise VoIP and unified communications market.


“There is a perception in the market place that SIP trunking is all about cost savings, and to a certain degree that’s true: SIP trunking allows organizations to build a more efficient trunking infrastructure, thus lowering their monthly telecom expenditures. But service providers should take note that when it comes to selecting a SIP trunking service provider, the most important criterion is reliability, not cost,” notes Matthias Machowinski, directing analyst for enterprise voice and data at Infonetics Research.


  • Although many organizations have deployed VoIP on their premises, they still use legacy technologies to connect to the PSTN, with T1 lines the most commonly used trunking service today through 2012
    • However, SIP trunk use is growing, and by 2012 will be the second most commonly deployed trunking service
  • Topping the list of reasons to deploy SIP trunking are the ability to centralize applications, enabling multimedia communication, and easier management/flexibility
  • Cisco leads the list of installed PBX manufacturers by a wide margin, followed by Avaya
  • AT&T and Verizon are used most often as providers of SIP trunking services by survey respondents

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