SIP Trunking: Everything You Need to Know The Service Provider Perspective

1. 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. 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. 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. 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. 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. BandTel N-Plus™Network Diagram

7. SIP Trunking in a Converged Environment • Combined Voice and Data via a SIP-Aware Firewall (SAFW)

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. • CODECs supported include: • G.711 • G.729 • CODECs can be changed “on the fly” to meet CPE requirements and address bandwidth limitations.

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. TotalView Overview Screen

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. 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. 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. 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. 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. Summary • Understanding SIP Trunking allows you to make informed, effective choices. • BandTel is a leading provider of Pure SIP Trunking.

17. Contact Information • Thanks very much for your participation and interest! • BandTel wants to hear from you! • www.bandtel.com • sales@bandtel.com • 800-730-2870 • International: 603-528-6538 • The BandTel Team