1. What is SIP Trunking? Thomas Roel Convergence Sales Engineer 651.796.7043 troel@nacr.com

2. SIP in the Enterprise Leading topic of Conversation: TRUNKING Collaboration is a significant conversation piece o Presence is a new requirement o BYOD o Application Distribution and Sequencing o CEBP – event-triggered communications

3. ISDN & Analog Trunking SIP Provider WAN Service Call Server TDM endpoints IP endpoints PSTN The current gold standard … but fading TDM trunk

4. SIP Trunking Justifications Service Provider motivations to move to SIP trunking Dwindling, and the expectation of dwindling, TDM revenues Offer new services and applications to maintain profits Incumbents need to keep smaller competitors (without TDM capabilities) out of their accounts Provide one access method for all voice and data services Enterprise benefits Reduction on enterprise hardware Reduction in footprint, power consumption and maintenance charges Flexibility in provisioning / design / resource utilization Architecturally ready for future applications (federation etc) Potential cost savings Enhanced survivability

5. Why SIP Trunking is good. dynamic smaller foot-print lower cost viable technology

6. SIP Trunking Example WAN Service Call Server TDM endpoints IP endpoints PSTN SIP Provider SIP Services Session Border Controller (SBC)

7. FOCUS on SIP Trunking Using SIP trunks to connect to the service provider network could be a way to save money and extend IP, but as with any new carrier service, SIP trunks come with their own set of challenges. If you want to truly capture the savings and keep real-time applications performing as users expect, there are lots of technical challenges to deal with. … SIP trunks come with their own set of challenges … http://www.nojitter.com/hotzone/sip_trunking.jhtml

8. Challenges Vendor/Carrier Experience o Different geographies and different vendors equate to different levels of local expertise TRAINING – Customers are less and less willing take ownership due to unfamiliarity with the technology – Data- Centric Providers SBC push-back or vendor requirement

9. Network Normalization TCP & TLS Security & QoS Clear-Text & VoIP Firewall & NAT traversal NAT breaks SIP SIP Normalization Open Standards other SIP Trunking considerations

10. Thank you Thomas Roel Convergence Sales Engineer 651.796.7043 troel@nacr.com