1. 1 VoIP, What is VOIP? George Dallas

2. 2 Agenda What is VoIP? Why VoIP? What’s Required for VoIP Deployment? Need for SIP Recommendations What the Vendors are Saying Q/A

3. 3 What is VoIP?

4. 4 VoIP = “Voice over Internet Protocol” Basically, VoIP means Voice transmitted over a Digital Network” Also called IP Telephony Standards based (e.g., H.323, G.711, G.729, RTP, UDP, IP, RSVP, SIP)

5. 5 What is VoIP? VoIP is the latest in a long series of actions to change voice transmission from an all analog to an all digital network

6. 6 Traditional Analog Systems Traditional Analog Systems have tremendous Quality of Service Built In.  They assign a dedicated end-to-end connection for each pair of users  These connections could carry more than just a voice connection -- but they don’t  A lot of potential bandwidth is wasted  It’s like having your own personal Limo – ready to take you anywhere at a moments notice  Very Good service – but not very efficient

7. 7 VoIP Systems VoIP Systems differ from Analog Systems  They convert voice into packets and then mix several conversations onto the same wires (IP Networks)  These circuits can also carry data packets as well  An efficient use of bandwidth  It’s like having a fleet of shared taxis  Make efficient use of resources – but you could still end up standing in the rain trying to catch a taxi

8. 8 IP Networks IP Networks were not designed with the same Quality of Service as Analog Phone Networks  IP Networks anticipate that some packets may be lost or delayed  IP Networks contain provisions to request the re- transmission of missing packets  From a data standpoint, a user may wait an extra second for a web page to load

9. 9 Need for Quality But Voice Networks cannot tolerate delay and missing packets  To be effective, Voice networks require a continuous stream of packets  You can’t have a random series of 2-3 second delays in the middle of a sentence and have an effective conversation  This lack of Quality of Service initially proved to be a barrier to the mainstream adoption of VoIP

10. 10 Need for Quality Voice is a Real-Time Application  Delay < 150 (ITU-G114) - 200 ms OK in Corporate network  Jitter (delay variation) < 30 ms  Packet Loss < 1%

11. 11 Recent Advances Recent advances in Networking have overcome the Quality of Service Issues  Protocols have been developed to provide an adequate level of service and quality  Network Switching equipment has evolved to give Voice traffic priority over Data traffic  Virtual Local Area Networks (VLANs) can segregate Voice and Data traffic

12. 12 Why VoIP?

13. 13 Which Technologies Will Drive Employee Productivity? IP Telephony Ranked Second on List of Technologies Associated with Improved Employee Productivity Source: Sage Research, January 2003 Virtual Private Networks IP Telephony Wireless LANs Wireless Email Mobile Technology Instant Messaging Other 60% 54% 47% 30% 26% 18% 2%

14. 14 Key Customer Drivers for IP Communications Lower Cost of “Network” Ownership  Cost savings are the primary short-term reason to converge voice, data and video onto a single IP network  This reflects the impact of the slowing economy on IT investment Enhanced Business Communications  Creating new revenue streams and deploying new applications that can increase productivity or enhance customer care are seen as significant and as longer term benefits of convergence Aggregate View on Drivers 0% 20% 40% 60% 1st — 4282nd — 3973rd — 344 To drive cost savings (easier infrastructure mgmt.) To drive revenues To enable additional application capabilities Other Source: The META Group Multi-Client Study 2000/01

15. 15 Lower Cost of “Network” Ownership Almost 70% of survey respondents believe they will realize substantial to moderate infrastructure savings when converging their network 50% expect substantial to moderate administrative cost savings 75% expect to achieve substantial to moderate voice/data circuit savings Anticipated Cost Savings 0% 10% 20% 30% 40% 50% SubstantialModerateLimitedNone Administrative Streamlining Infrastructure (Cabling, Hardware) Circuit Costs (T1s, T3s) Toll Bypass Other Source: The META Group Multi-Client Study 2000/01

16. 16 The Basic Theory Put Voice, Data and Video on to one Network and achieve savings and flexibility  Eliminate redundant Networks  Consolidate IT Staff  Simplify Administration and Maintenance  Reduce hardware  Reduce cabling – 1 cable for voice and data  Reduce WAN Charges Converged Networks are the key

17. 17 Disparate Networks Email Collaboration Calendar Web Application Instant Messaging DATA Video Conferencing VIDEO Voice Messaging Audio Conferencing Telephone Services VOICE

18. email Voice Messaging Collaboration Calendar Video Conferencing Web Application Audio Conferencing Instant Messaging Telephone Services Converged Network Security

19. 19 What’s Required for VoIP Deployment?

20. 20 Data Networks Data Networks must be robust enough to support the additional Voice and possibly Video Traffic  Remember -- if the Data Network is down, you can’t make phone calls Network Architecture needs to address  Quality of Service  Security  Redundancy  Availability

21. 21 Network Switches If your Data Network is more than 3 years old it may not be able to support VoIP Newer Layer-2 and Layer-3 Switches are designed to support VoIP  VLAN Support  QoS Support  Security Features  Gigabit Links  POE  Large Buffers

22. 22 Power Analog Phone Systems provide power to Phones over the phone cabling Analog Phone systems have Battery Back Up Systems  If the Power goes off – The phones still work VoIP Phones are powered over the Data Cable from the Network Switch  Power Over Ethernet (POE)  Requires Battery Back Up Systems (UPSs) in each Data Closet

23. 23 Network Cabling Existing Voice Category-3 Cabling cannot support VoIP  Requires new cables for existing installations  Minimum of one Category-5e Cable for all users VoIP can reduce cabling costs for new deployments

24. 24 Network Architecture Data Networks need to be re-designed  Separate VLANs are required to segregate traffic Voice Data Video Management Deploy Redundant Links  Multiple Paths  Rapid Spanning Tree Support Hardware Based Routing  L-3 switches vs. Software based Routers

25. 25 Network Security Firewalls should be deployed where Voice and Data Networks meet  Prevent Data Network Attacks from affecting Voice Users should be authenticated to gain access to the network  Radius Servers Authenticate Users Assign Policies Assign Users to VLANs based on Identity

26. 26 VoIP Systems Deploy standards based VoIP systems  SIP support is a key Instruments Signaling System Servers should be distributed Determine if a Hybrid approach works best for you

27. 27 Need for SIP

28. 28 SIP Session Initiation Protocol (SIP) is an Open Standard signaling protocol used for establishing sessions in an IP Network  It is a catalytic protocol that delivers key signaling elements that can turn a VoIP Network into a true IP Communications Network  It replaces older and proprietary signaling protocols  It enables multiple vendors to interoperate  It enables new services to be easily added  Enables Presence Based Capabilities

29. 29 Why Sip? Address of Record Shared Call Appearance Shared Line Group Pickup Call Park Directed Pickup Hold with Music

30. 30 Why Sip? Buddy list Push-to-talk Multimedia Call Center Presence based Routing Intelligent Call Screening Video, Chat, IM ???????

31. 31 RTCPRTP IP MGCP Call Control and SignalingSignaling and Gateway Control Media H.225 Q.931 H.323 H.323 Version 1 and 2 supports H.245 over TCP, Q.931 over TCP and RAS over UDP. H.323 Version 3 and 4 supports H.245 over UDP/TCP and Q.931 over UDP/TCP and RAS over UDP. SIP supports TCP and UDP. SIP leverages other protocols. TCP RAS UDP SIP H.245 Audio/ Video RTSP SIP, H.323 and MGCP

32. 32 Recommendations

33. 33 Recommendations For new Installations  Deploy a Converged Network  Deploy VoIP System  Deploy Advanced L-2 and L-3 Switches  Take advantage of Reduced Cabling Requirements

34. 34 Recommendations For existing Installations  IP Enable your Existing PBX  Deploy VoIP initially where needed Sales Call Centers Tele-workers - #1 application Wireless  PDAs  Soft Phones (Laptops)  WoVoiP  Implement VoIP on the WAN between Sites  Phased approach – leverage existing investment

35. 35 Reasons to Switch to VoIP VoIP is the Strategic Direction of Carriers and Vendors  Conventional Systems will become outdated and expensive to maintain and upgrade VoIP provides a Feature Rich and Cost Effective Architecture  New features and services will be added to VoIP Systems  Competitive Pressures will force many Industries to Upgrade to keep pace

36. 36 Reasons to Switch to VoIP VoIP Investment Protection  IP Enable Existing Systems  Take advantage of new features where you need them now  Migrate based on budgets and business needs VoIP can Reduce Maintenance Expenses  Moves, Adds, Changes are simplified  Converged Networks = Fewer Systems

37. 37 Reasons to Switch to VoIP Flexibility and Portability  IP Soft Phones  Wireless IP Phones  Dual Mode Cellular / Wireless IP Phones Key Applications  SIP Based  Presence Detection  Follow Me  Call Centers

38. 38 Reasons to Switch to VoIP Better Network Management  VoIP Network Upgrades provide benefits for Data Users as well Real Time Collaboration  Video Telephony  Presence Detection  Instant Messaging  Drag and Drop Conference Calls Improved Bandwidth Utilization  Converged WAN Links for Voice, Data and Video

39. 39 NEC on IP Telephony “IP Telephony is growing throughout the world as communications decision makers begin to take advantage of the potential cost savings afforded by converged infrastructures. NEC’s initiative is to facilitate the migration to IP Telephony. One of the essential aspects of NEC’s strategy is honoring our commitment to investment protection for our customers. Therefore we have "IP enabled" our existing line of traditional PBXs, Key Telephone Systems and Document Solutions so that our customers can enjoy the cost savings of IP Telephony without rendering obsolete their existing systems.  http://www.necunifiedsolutions.com/main/Solutions

40. 40 Final Thoughts Avoid the Hype One approach, which is hotly debated in the VoIP market, is to rip out your old PBX, phones and wiring and replace everything with IP phones. That might work in some cases, particularly where the old PBX is long past its expiration date, but it isn't always the best approach. Consider deploying IP Telephony based on a Phased Approach – See NEC’s migration strategy With a carefully targeted VoIP deployment you can achieve 70% of the ROI with 30% of the investment Understand the benefits that the technology offers, not just the costs Have a Plan