Digium^® Carrier Interoperability Certification

BandTel

BandTel is a leading worldwide provider of VoIP telephone services. The company is dedicated to ensuring its customers and partners alike have access to the most reliable end-to-end VoIP service available on the market today.

BandTel's N-Plus T architecture is designed to solve the throughput and redundancy problems on SIP based networks, and eliminate any single points of failure.

Further, the rigorous interop process that BandTel has undergone with Digium makes the deployment of Digium products on the BandTel NPlus™ network a seamless "Plug & Play" experience for the end user.

• Digium Plug & Play
• NPlus Architecture- Never Go down
• Bandwidth Agnostic- bring you own Bandwidth, or have BandTel assist
• DID Global Number Services & Virtual Trunking- BandTel's DID network covers the world
• SMS Toll Free 800 Service- best price, totally redundant
• Flexible Pricing- dialing plans available to fit small, medium, and large volume clients

BandTel offers a full suite of telecom services for the enterprise user, including inbound DID termination, inbound 800 tool free termination, and outbound 1+ domestic and 011+ international termination.

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Broadvox

Founded in 2001, Broadvox is a worldwide leader in providing integrated managed VoIP services to SMB, enterprise, and carrier customers. It has deployed one of the largest full-featured global VoIP networks and is trusted by more than 200 telecommunications carriers, ASPs, ISPs and over 3,000 businesses to transport over 10 billion minutes annually. The Broadvox Network Operations Center, operating 24x7, provides the reliability, security, and quality of service required by the world's most discriminating customers. The Broadvox SIP Trunking product line includes GO!Anywhere, GO!Local and GO!Domestic. Connectivity is offered with GO!Broadband, ranging from DSL to T1s and DS3s.

Cbeyond

Cbeyond, Inc. (NASDAQ: CBEY) is a leading provider of IT and communications services to more than 44,000 small businesses throughout the United States. Recently named as the sixth fastest growing technology company by Forbes magazine, Cbeyond offers more than 30 productivity-enhancing applications including local and long-distance voice, broadband Internet, mobile, BlackBerry(R), broadband laptop access, voicemail, email, web hosting, fax-to-email, data backup, file-sharing and virtual private networking. Cbeyond delivers these services over a 100 percent private all IP network.

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Covad Communications Company

Covad Integrated Access service is delivered over a powerful, voice-optimized T1 line that dynamically allocates bandwidth between voice and data, and works with customers' existing phone systems so businesses can leverage their equipment investment while saving money and simplifying operations. By always prioritizing voice traffic and automatically allocating all remaining bandwidth to data traffic, Covad's IA Service provides maximum call quality and data throughput. Covad Integrated Access also utilizes SIP trunking and supports a wide range of IP, digital, and analog PBXs.

Customers can start with as few as four phone lines and can use "My Covad Account" to view their service details, change their calling plans, add or remove voice lines, and add or remove DIDs. New lines can also be added one by one, rather than in the more typical "blocks" offered by competitors, making it easier to grow the service with the company. Covad's IA service also includes unlimited local and free, on network, site-to-site calling. Covad Integrated Access service is backed by expert 24x7 support and robust service level agreements.

Covad is a leading nationwide provider of integrated voice and data communications. The company offers DSL, Voice over IP, T1, broadband wireless, Web hosting, managed security, IP and dial-up, and bundled voice and data services directly through Covad and through Internet service providers, value-added resellers, telecommunications carriers, and affinity groups to small and medium-sized businesses. Covad's corporate headquarters are located in San Jose, California.

Download Quick Configuration Guide for Switchvox

MegaPath

MegaPath is the leading provider of managed IP communications services in North America. MegaPath leverages its wide selection of broadband connectivity, Virtual Private Networks (VPN), Voice over IP (VoIP) and security technologies to enable businesses to lower costs, increase security and enhance productivity. Businesses of all sizes can easily and securely communicate between their headquarters, branch offices, retail locations, mobile workers, and business partners. To learn more about why over 23,000 companies have chosen MegaPath's managed IP data, voice and security services to improve their business communications call 1-877-MegaPath ( 634-2728 ).

PAETEC

PAETEC was founded in 1998 with a mission to be the most customer- and employee-oriented communications provider. Today, we are one of the nation's largest communications carriers, providing data, voice and Internet services to 83 of the nation's top 100 metropolitan areas. Our geographic reach, personal approach and broad portfolio of products that solve real-world needs have made PAETEC the pre-eminent communications carrier for businesses. Our value-added capabilities include managed services, enterprise communications management software, network security solutions and customer premises equipment. In addition, we offer specialized expertise for customers in Financial Markets, Government, Health Care, Higher Education, and Hospitality.

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Simple Signal

Not all SIP trunking providers are created equal. You need flexibility, redundancy and reliability delivered by a company dedicated to unparalleled support, advanced communications infrastructure, at a price any small business can afford. Dramatic cost savings, coupled with voice quality that surpasses traditional phone providers is making SimpleSignal SIP trunks the logical choice.

SpeakEasy

Speakeasy, a Best Buy Company, is one of the nation's leading broadband voice (VoIP) and data providers. Focused on serving small businesses, Speakeasy offers simplified voice and data solutions that improve the customer experience, increase employee productivity and help cut costs. Speakeasy provides service nationwide. It is headquartered in Seattle and have an East Coast Regional Sales office in Washington D.C.

Speakeasy provides customers and partner consultants high-quality voice, data and IT solutions with the convenience of a single supplier, simple pricing, and a single bill. Speakeasy ensures its customers' success with a private nationwide network and extraordinary customer support available 7/24/365.

Download Quick Configuration Guide for Switchvox

VoIP Unlimited

VoIP Unlimited operate in the UK and are considered a leading brand in the supply of business grade SIP trunk services. The business is dedicated to working with selected channel partners to offer true VoIP services to SMB end customers. From the initial ordering of services and number porting to providing professional billing, VoIP Unlimited has the focus to implement successful VoIP projects accurately and effectively.

VoIP Unlimited has come up with a comprehensive range of services around the core SIP trunk offering including IP connectivity such as ADSL, SDSL, MPLS and National Ethernet; BT PSTN, ISDN and ISDN30 lines and International numbering services.

Windstream

Windstream Corporation is an S&P 500 company with about $3.7 billion in annual revenues. Windstream provides phone, high-speed Internet and high-definition digital TV services to customers in 21 states. The company also offers a wide range of IP-based voice and data services and advanced communications solutions to businesses and government agencies.

XO Communications

XO Communications is a leading provider of voice, data, Internet, VoIP and managed services to businesses, enterprises, governments and carriers in 75 markets nationwide. XO's wealth of network assets includes a high-capacity IP network, optimal for the demands of converged voice and data IP services. XO's VoIP services portfolio includes award-winning XO SIP, which allows businesses to get the most from their IP-PBX. And bandwidth-based pricing simplifies pricing and allows you to maximize the use of your SIP trunk without incurring additional cost for each channel.

Tailor XO SIP to your needs with port speeds from 1.5 to 45 Mbps, a broad set of features including voice compression and virtual Direct Inward Dialing, and calling plans to fit your business. Unlimited free site-to-site calling between XO VoIP sites means XO SIP is ideal for multi-location businesses.

XO SIP offers powerful VoIP features and the latest IP telephony applications to maximize your phone system's performance, boost productivity and improve your bottom line. XO SIP can:

• Reduce recurring cost of separate voice and data circuits
• Boost network capacity without the expense of additional T1s
• Eliminate the cost of purchasing, supporting and maintaining media gateways
• Eliminate bandwidth-consuming protocol conversions

XO's rigorous certification of IP PBX devices ensures seamless interoperability and ease of installation with XO SIP. XO has certified interoperability between XO SIP and Digium's AA50 and Switchvox IP PBXs to assure businesses of an optimal, end-to-end IP communication solution.

XO SIP Service won Internet Telephony Magazine's Product of the Year for 2007.

Download Quick Configuration Guide for Switchvox