Explanation of voip


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  • Source: META Group Multi-Client Study Respondents were asked to rank cost savings, drive revenues, enable applications as either the most important (1 st ) to least important (3 rd ). For example, 55% of Global 2000 respondents believed that Cost Savings was the #1 reason to converge their network, while 31% felt enabling new applications was the most important reason. Further example, 27% of respondents felt that driving revenue was the 2 nd most important reason to converge their network. The numbers (428, 397, 344) represent the # of people that responded to the question. The primary takeaway is that in the short term (due to the current economy) companies are looking to save costs. Further down the road, they recognize the potential for a converged network to enable new application abilities and potentially drive revenues.
  • Source: META Group Multi-Client Study Each respondent was asked to whether or not they felt a specific area of cost savings would be none, limited, moderate, substantial. Each bullet point aggregates the substantial and moderate cost savings for the respective area (the assumption is that even a moderate cost savings or several of them combined could be significant). Carrier Costs are strictly related to the reduction of the number of T1’s and T3’s Infrastructure is related to hardware and reduced cabling. The interesting aspect of this slide is that a very small percentage (ranging from 5-12%) felt there would be not cost savings.
  • 3 dumb networks to one intelligent network Low value applications
  • E-mail moves to UM Moves to Intelligent network Intelligent network with high value applications. This network also provides the ability to offer easy to use and manage broadcast video. Four driving factors allowed us to offer broadcast video to every desktop Inexpensive high quality USB cameras Fast PCs Voice, Video, Data converged on IP Optical technology has made prices of IP bandwidth economical.
  • Ministry of Social Policy – 8,000 phones Cray: Deployed 650 Phones at (3) sites in late 2000. Savings came from the ability to not hire (3) additional IT support staff due to simplified network management, new data network and IP Telephony cost only slightly more ($1.3M versus $1M) than PBX alone. City of Houston Proof-of-Concept pilot of 600 phones successful. Plan to roll-out 23,000+ phones by end of summer 2002 to 400 sites including hospitals/clinics, police/fire, and emergency services. Payback is less than one year and annual savings are $6.2M. Cost savings driven by reduced costs for voice circuits ($5M savings), eliminated PBX Maintenance costs of $900K, eliminated PBX upgrade costs of $765K. City of Dallas Currently 100 sites into a 280 site deployment Expect to realize a $21M savings over ten years. Cost savings driven by reduced voice circuit costs and fact that they were able to converge 5 incompatible data networks and one voice network into a single converged network.
  • Explanation of voip

    1. 1. VoIP , What is VOIP? George Dallas 1
    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 2
    3. 3. What is VoIP? 3
    4. 4. What is VoIP? 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) 4
    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 5
    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 6
    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 7
    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 8
    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 9
    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% 10
    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 11
    12. 12. Why VoIP? 12
    13. 13. Which Technologies Will Drive Employee Productivity? Virtual Private Networks 60% IP Telephony 54% Wireless LANs 47% Wireless Email 30% Mobile Technology 26% Instant Messaging 18% Other 2% IP Telephony Ranked Second on List of Technologies Associated with Improved Employee ProductivitySource: Sage Research, January 2003 13
    14. 14. Key Customer Drivers for IPCommunications Lower Cost of “Network”  Aggregate View on Drivers Ownership  Cost savings are the primary short-term reason to converge 60% voice, data and video onto a single IP network  This reflects the impact of the 40% slowing economy on IT investment 20% Enhanced Business Communications 0%  Creating new revenue streams 1st — 428 2nd — 397 3rd — 344 and deploying new applications that can increase productivity To drive cost savings (easier infrastructure mgmt.) or enhance customer care are To drive revenues seen as significant and as To enable additional application capabilities longer term benefits of Other convergence 14 Source: The META Group Multi-Client Study 2000/01
    15. 15. 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 16
    16. 16. Disparate Networks Collaboration Calendar Audio Conferencing DATA VOICE Voice Messaging Web Email Application Instant Telephone Messaging Services VIDEO Video Conferencing 17
    17. 17. Converged Network Calendar Instant Messaging Collaboration Web Application Video Conferencing Audio Conferencing email Telephone Voice Services Messaging Security
    18. 18. What’s Required for VoIPDeployment? 19
    19. 19. 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 20
    20. 20. 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 21
    21. 21. 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 22
    22. 22. 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 23
    23. 23. 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 24
    24. 24. 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 25
    25. 25. 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 26
    26. 26. Need for SIP 27
    27. 27. 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 28
    28. 28. Why Sip? Shared Call Appearance Hold Shared with Line Music Address of Record Directed Group Pickup Pickup Call Park 29
    29. 29. Why Sip? Multimedia Call Center Buddy list Push-to-talk Presence based Routing ??????? Video, Chat, IM Intelligent Call Screening 30
    30. 30. SIP, H.323 and MGCP Call Control and Signaling Signaling and Media Gateway Control Audio/ H.323 Video H.225 H.245 Q.931 RAS SIP MGCP RTP RTCP RTSP TCP UDP IPH.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 andRAS over UDP.SIP supports TCP and UDP.SIP leverages other protocols. 31
    31. 31. Recommendations 32
    32. 32. 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 33
    33. 33. 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 34
    34. 34. 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 35
    35. 35. 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 36
    36. 36. 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 37
    37. 37. 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 38
    38. 38. 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 39
    39. 39. 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 isnt 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 40