Why Enum matters to VOIP peering

Enum is putting IP telephony on the map and expanding the world of VoIP

Behind the scenes in VOIP peering services is Enum, a protocol that translates telephone numbers to related IP addresses. Most VOIP peering services use Enum databases to connect telephone calls from one VOIP network to another and to keep the traffic on IP networks.

"Enum is one example of a directory service that is essential to the industry as it deploys IP throughout the world and delivers a whole variety of voice, data, video and other content services,'' says Jeff Ganek, CEO of NeuStar. "Enum is particularly important because it enables the delivery of all these advanced services, which are possible because of the billions of dollars of investment the industry has made in IP technology, to billions of endpoints on the worlds' networks that are addressed by telephone numbers.''

NeuStar has offered Enum services for three years and has 1.3 billion telephone numbers in its Enum database. Half of those telephone numbers are corporate and the other half are residential.

NeuStar's Enum service is bundled into SIP-IX, a new service that allows carriers to cooperate and keep traffic on IP networks.

"We're seeing a very significant explosion of additional services that are now being rolled out, like instant messaging, push-to-talk, video sharing, video telephony as well as premium content services,'' says Mark Foster, CTO of NeuStar. "Carriers need additional service elements to enable that traffic to work between IP networks. That's the suite of services of SIP-IX.''

NeuStar is running a trial of SIP-IX with mobile, cable and wireline carriers. NeuStar won't identify the number or names of the carriers participating in the trial.

"Part of the value proposition of SIP-IX is the interoperability among different carriers, such as cable to wireless and cable to wireline,'' Foster says. Interoperability is "very important for fixed/mobile convergence."

Foster says that all the services in the SIP-IX trial use Enum and most involve VOIP.

"A few involve large enterprises as well as consumer services,'' Foster says. "The enterprises are looking for such productivity enhancements as dynamic call routing across multiple networks through multiple types of devices.''

NeuStar executives predict carriers will introduce new end-to-end IP services based on the interoperability features of SIP-IX in the first half of 2007.

Join the PC World newsletter!

Error: Please check your email address.

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Carolyn Duffy Marsan

Network World
Show Comments

Essentials

Microsoft L5V-00027 Sculpt Ergonomic Keyboard Desktop

Learn more >

Lexar® JumpDrive® S57 USB 3.0 flash drive

Learn more >

Mobile

Lexar® JumpDrive® S45 USB 3.0 flash drive 

Learn more >

Exec

HD Pan/Tilt Wi-Fi Camera with Night Vision NC450

Learn more >

Audio-Technica ATH-ANC70 Noise Cancelling Headphones

Learn more >

Lexar® Professional 1800x microSDHC™/microSDXC™ UHS-II cards 

Learn more >

Lexar® JumpDrive® C20c USB Type-C flash drive 

Learn more >

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest News Articles

Resources

PCW Evaluation Team

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Aysha Strobbe

Windows 10 / HP Spectre x360

Ultimately, I think the Windows 10 environment is excellent for me as it caters for so many different uses. The inclusion of the Xbox app is also great for when you need some downtime too!

Mark Escubio

Windows 10 / Lenovo Yoga 910

For me, the Xbox Play Anywhere is a great new feature as it allows you to play your current Xbox games with higher resolutions and better graphics without forking out extra cash for another copy. Although available titles are still scarce, but I’m sure it will grow in time.

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?