Kevin Withnall VoIP In 5 Minutes with Asterisk

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Kevin Withnall VoIP In 5 Minutes with Asterisk

  1. 1. VoIP in 5 minutes - Kevin Withnall (ILB)
  2. 2. Outline <ul><li>Who ILB is </li></ul><ul><li>What VoIP is </li></ul><ul><li>Concepts to understand </li></ul><ul><li>The Good </li></ul><ul><li>The Bad </li></ul><ul><li>How VoIP can save money </li></ul><ul><li>How VoIP can add value </li></ul>
  3. 3. Who ILB is <ul><li>Running since 1993 </li></ul><ul><li>About 10 people full time </li></ul><ul><li>Software Development </li></ul><ul><li>Network Maintenance </li></ul><ul><li>Carbon neutral for 6 years </li></ul><ul><li>I have dCAP #1360 </li></ul><ul><li>Stated Company Goals </li></ul><ul><ul><li>Community Welfare </li></ul></ul><ul><ul><li>Environmental Welfare </li></ul></ul><ul><ul><li>Staff Welfare </li></ul></ul>
  4. 4. What VoIP is <ul><li>Any voice over IP networks </li></ul><ul><li>Asterisk, Skype, MSN, Google Talk etc </li></ul><ul><li>Using SIP, IAX2 etc </li></ul><ul><li>Uses Codecs to compress voice (G.711au, G.729, gsm, speex etc) </li></ul><ul><li>Simply converts audio to digital stream and sends as packets </li></ul><ul><li>Mostly covering Asterisk here </li></ul><ul><li>“ Its just software” </li></ul>
  5. 5. What I mean by Voip
  6. 6. Concepts to understand <ul><li>Trunks </li></ul><ul><ul><li>To Providers </li></ul></ul><ul><ul><li>SIP, IAX </li></ul></ul><ul><ul><li>ISDN (Pri and BRI) </li></ul></ul><ul><li>Extensions </li></ul><ul><li>In-Line ISDN configurations </li></ul>
  7. 7. The Good <ul><li>Users don’t need to care what technology they are using </li></ul><ul><li>Least cost routing </li></ul><ul><li>Not locked in to technology, can use softphones, physical phones, mobiles etc </li></ul><ul><li>Foreign trunks </li></ul><ul><li>Features </li></ul><ul><ul><li>FoIP </li></ul></ul><ul><ul><li>Voicemail </li></ul></ul><ul><ul><li>IVR </li></ul></ul><ul><ul><li>DISA </li></ul></ul><ul><ul><li>automated calls (alarms, evac systems) </li></ul></ul><ul><li>Config your own system with a browser </li></ul><ul><li>MOH is easy </li></ul><ul><li>AGI, AMI – Integrate to your programs </li></ul>
  8. 8. The Bad <ul><li>Jitter </li></ul><ul><li>Non deterministic routing, latency, delays </li></ul><ul><li>Traffic Sharing </li></ul><ul><li>Spending the whole call saying ‘can you hear me now’ </li></ul><ul><li>People are very intollerant of voice dropouts on ‘normal’ phones. </li></ul><ul><li>Relies on more SPOFs than traditional phone systems </li></ul>
  9. 9. How VoIp can save money <ul><li>MUCH cheaper calls </li></ul><ul><li>International Trunks </li></ul><ul><li>Free Branch to Branch calls </li></ul><ul><li>Easier to budget (a higher ratio of fixed costs) </li></ul><ul><li>Remote hosting of voip services, no traditional trunks needed </li></ul>
  10. 10. How VoIp can add value <ul><li>Not geographically important </li></ul><ul><li>Extremely scalable </li></ul><ul><li>Staff in remote areas with differing skill sets </li></ul><ul><li>Happier staff – work from home, flexible hours </li></ul><ul><li>Features. Anything you want to do, it can do. </li></ul>
  11. 11. Conclusion <ul><li>If Voice calls are costing you money, VoIP can help </li></ul><ul><li>If most of your costs are for other than voice, it may not help the bottom line directly </li></ul><ul><li>If you need a more flexible, future proof system, this can help </li></ul>
  12. 12. Where to go next <ul><li>Email me if you want to know more. </li></ul><ul><ul><li>[email_address] </li></ul></ul><ul><li>Download and install www.asterisknow.org </li></ul><ul><li>Visit ILB for a demo </li></ul><ul><li>Come to an ILB ‘Telephony’ introduction evening. </li></ul>

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