1. © 2008 All rights reserved  Bandtel Proprietary SIP Trunking: Everything You Need to Know The Service Provider Perspective February, 2009 Joel Maloff Senior Vice President of Sales and Marketing 954-366-0681 jmaloff@bandtel.com

2. © 2009 All rights reserved  BandTel Proprietary 2 Overview SIP Trunking is delivered in a variety of fashions by different service providers. –Understanding the distinction between the various service provision models is essential for enterprises and VARS alike! –Each service provider has an underlying architecture that impacts their ability to deliver services. –Each service provider has different strengths and weaknesses. –What is right for you?

3. © 2009 All rights reserved  BandTel Proprietary 3 Variations on SIP Trunking Within the service provider marketplace today, there are a variety of SIP Trunking flavors. –SIP Trunking via Dedicated Lines Requires a T1, DSL or PRI for service delivery Purports to deliver better quality Limited footprint to where dedicated service are available Large recurring cost due to leased lines –SIP Trunking as a Feature Provided by vendors of hosted IP PBX or other services Not normally the primary focus Competitive with VARS or legacy systems May have scalability or geographic limitations

4. © 2009 All rights reserved  BandTel Proprietary 4 Variations on SIP Trunking –Pure SIP Trunking The provision of SIP trunks as a primary service Not limited in footprint due to geographic restrictions Does not compete with VAR offerings or legacy premises equipment Can be designed to mirror the quality and performance of tradition telephony service delivery Highly scalable

5. © 2009 All rights reserved  BandTel Proprietary 5 BandTel Technical Description Custom Designed N-Plus Architecture –Dynamic Call Routing With N-Plus architecture –Scalable high call transaction engines (via N-Plus) –True five 9's redundancy –Lower operating costs Minimal license fees required to primary systems vendors –Excellent Call Quality –Virtual Trunking (many DIDs to one customer premises Signaling Point) Diverse PSTN wholesale carrier relations –Standard services include 1+, 011+, 800, DID –Strong national and international DID product

6. © 2009 All rights reserved  BandTel Proprietary BandTel N-Plus™Network Diagram

7. © 2009 All rights reserved  BandTel Proprietary 7 SIP Trunking in a Converged Environment Combined Voice and Data via a SIP-Aware Firewall (SAFW)

8. © 2009 All rights reserved  BandTel Proprietary 8 BandTel Technical Description Comparison with traditional telephony –With PSTN connections, customers receive: Called party information (DNIS – Dialed Number Identification Service) Calling party information (ANI – Answer Number Identification) Caller Entered Digits (CED) –With SIP trunking, this information is also provided per RFC 2833 (http://www.faqs.org/rfcs/rfc2833.html) via the RTP payload for DTMF Digits, Telephony Tones and Telephony Signals.http://www.faqs.org/rfcs/rfc2833.html –CODECs supported include: –G.711 –G.729 CODECs can be changed “on the fly” to meet CPE requirements and address bandwidth limitations.

9. © 2009 All rights reserved  BandTel Proprietary 9 BandTel Technical Description Monitoring and Managing (TotalView) –BandTel’s TotalView web-based portal is designed to provide a real-time view into usage trends for your company or for your customers and clients. –This includes: Call details Total minutes Average Length of Call Post Dial Delay Actual customer invoices BandTel assists you in managing your customer’s accounts.

10. © 2009 All rights reserved  BandTel Proprietary 10 TotalView Overview Screen

11. © 2009 All rights reserved  BandTel Proprietary 11 Implementing SIP Trunking Site Survey –Equipment and software interoperability –Bandwidth sufficiency –Firewall and NAT issues –SIP aware firewalls Information system security should be part of an overall SIP trunking implementation plan. Direct Inward Dialing (DID) Number Assignment and Porting Testing and Troubleshooting

12. © 2009 All rights reserved  BandTel Proprietary 12 Does SIP Trunking make sense for you? Enterprises –If your organization has the following, you are an excellent candidate for SIP trunking: More than US$200 in long distance calling per month Enterprise offices and employees are geographically dispersed Regular international calling The need for local DID numbers in the USA and other countries –Freedom from geographic ties and limitations A desire to reduce monthly recurring telephone trunk and calling charges

13. © 2009 All rights reserved  BandTel Proprietary 13 Does SIP Trunking make sense for you? International businesses –SIP trunking offers international businesses the following: DID numbers in the USA, Canada, and other select countries worldwide. The ability to establish a cost-effective “virtual” presence in most of your major markets. Dramatic cost reductions when compared with tradition circuit- based or PSTN services. –BandTel offers international businesses a partner that is experienced in doing business internationally and focused on delivering superior SIP trunking solutions.

14. © 2009 All rights reserved  BandTel Proprietary 14 Does SIP Trunking make sense for you? VARS and Resellers –Enterprises worldwide are seeking solutions that maintain or increasing performance while lowering operating costs. –SIP trunking delivers on enhanced features and cost reduction. –SIP trunking also can provide an additional source of monthly recurring revenue for VARS and resellers during an economic climate wherein capital expenditures are being curtailed. BandTel welcomes inquiries from prospective VARS and resellers.

15. © 2009 All rights reserved  BandTel Proprietary 15 What sets BandTel apart? We are a PURE SIP TRUNKING PROVIDER! –Solution oriented rather than technology driven –Bandwidth agnostic –International offerings –Highly scalable network –Superior quality –Exceptional value

16. © 2009 All rights reserved  BandTel Proprietary Summary Understanding SIP Trunking allows you to make informed, effective choices. BandTel is a leading provider of Pure SIP Trunking.

17. © 2009 All rights reserved  BandTel Proprietary 17 Contact Information Thanks very much for your participation and interest! BandTel wants to hear from you! –www.bandtel.comwww.bandtel.com –sales@bandtel.comsales@bandtel.com –800-730-2870 –International: 603-528-6538 –The BandTel Team