Verizon Tops SIP List Again, CenturyLink Biggest Gainer

For the seventh consecutive year, Verizon leads the pack in IHS Infonetics’ SIP trunking rankings.

The company on Wednesday will release its North American Service Provider Scorecard, which profiles, analyzes and ranks the top 10 SIP trunking providers in North America.

Verizon was followed in the top 10, in order, by CenturyLink, AT&T and XO Communications. While the positions held by Verizon, AT&T and XO might not come as a surprise, CenturyLink’s very well could.

“All except CenturyLink have been near the top of the leaderboard for the past seven years and are mainstays in the SIP market, leading in service development and customer adoption,” said Diane Myers, research director for VoIP, UC and IMS at IHS. “CenturyLink had a big jump in this year’s scorecard due to a strong and growing installed base and improved financials. XO continues to have the largest installed base of connectivity trunks.”

Level 3 was another solid gainer, Myers said, strengthening its position on the SIP trunking scorecard thanks to its acquisition of tw telecom last year.

Other report highlights:

  • While the cloud is gobbling up most of the attention on the business VoIP front, SIP trunking is equally important as it’s the next generation of voice connectivity.
  • Scale is necessary for success in a service market based on cost. That’s why SIP trunking is dominated by the large operators.
  • While the installed base of SIP trunks is important to providers’ overall leadership score in the scorecard, financial stability and market strategy also have a measurable impact on the standings.

The report further says that providers are differentiating their SIP services based on security, interoperability, pricing and reliability since features aren’t a critical component of the technology.

Follow senior online managing editor Craig Galbraith on Twitter.

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