SIP Trunking Redux

May 4, 2009 by Garrett Smith

Back in October 2008 we featured a piece on SIP Trunking, which explained the basics of the technology and the potential benefits for business users.

SIP Trunking continues to proliferate, and I recently came across some excellent stories related to SIP Trunking that I thought I would share.

Over at, Alan Percy from Audiocodes explains the difference between BYOBB (Bring Your Own Broadband) and Bundled SIP Trunking offerings.

Also on NoJitter you can find a comprehensive piece on SIP Trunking from Matt Brunk, detailing some of his personal experiences with the technology.

Gary Kim at the IP Carrier Blog postulates on the prospective growth of the SIP Trunking market between now and 2103.

TMCNet’s David Byrd talks about the impact of bandwidth metering on SIP Trunking.

Cisco Interaction Network blogger Robb Boyd wonders, is SIP Trunking the next big thing?

There’s no question people are talking about SIP Trunking. They’re also Tweeting about it. If you have thoughts on SIP Trunking, pros, cons, personal experiences, predictions, etc….we’d love to hear from you.


  • A lot of the discussion around SIP trunking remains focused on traditional telephony concerns. That is, making the SIP trunks replace TDM trunks for connection to the PSTN. This ignores a major advantage to SIP trunks, using SIP URIs to bypass the PSTN altogether.

    By peering over SIP trunks between offices you can take advantage of wideband telephony internally with very little effort. With a little more effort you can support wideband more broadly with external peers.

    Such exposure to improved call quality is important to drive carriers & service providers beyond the current race to $0.00/minute for call origination/termination.

  • Garrett Smith

    @ Michael Graves

    Toll bypass is a great advantage of using VoIP.

    The reason this advantage doesn’t get more “air time” is likely because the overall percentage of businesses with multiple locations is low when compared with single location businesses.

    In addition, mid to large size businesses are now just starting to migrate and or consider a switch to VoIP. Up until today the majority of businesses making the switch have been rather small (there are exceptions though).

    I’d expect to see toll bypass get more press in the next year or two and look forward to it becoming a driver…thanks for bring it up Michael!

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