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Introduction to IP telephony & VoIP
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Introduction to IP telephony & VoIP

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Since the past decade VoIP is making telecommunications cheaper and affordable. In this presentation I have shared some basic concepts of VoIP and Asterisk, the world's best Open Source Software PBX

Since the past decade VoIP is making telecommunications cheaper and affordable. In this presentation I have shared some basic concepts of VoIP and Asterisk, the world's best Open Source Software PBX

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Transcript

  • 1. IP Telephony KAUSHAL BHAVSAR, PRATIKĀR TECHNOLOGIES
  • 2. Who am I? Tech Geek Entrepreneur Inventor Mentor Activist Human
  • 3. What is IP Telephony? TELEPHONY OVER INTERNET PROTOCOL, THAT IS!
  • 4. Some background L E T ’ S C L EA R S OME BA S I C CO N C E PTS F I RST
  • 5. PSTN – Public Switched Telephony Network PSTN Line
  • 6. Enterprise Telephony PSTN Line PBX
  • 7. PBX – Private Branch Exchange ALLOWS YOU TO HAVE YOUR OWN VIRTUAL PSTN
  • 8. 1995 - VoIP VOICE OVER INTERNET PROTOCOL BY VOCALTECH
  • 9. Why VoIP? Can add features easily Software based Optimum Bandwidth use Mobility ….
  • 10. What is VoIP? Internet-based communication based on a Virtual PSTN Not just limited to voice! ◦ Video ◦ Audio ◦ Fax ◦ Text/SMS VoIP is an important subset of Internet Telephony
  • 11. How to VoIP? It’s very simple (in terms of hardware) to setup VoIP. You need: ◦ Internet ◦ (Old) Computer ◦ IP Phones (or computers with headphones)
  • 12. But why use VoIP? Organizations can benefit greatly. Some killing features are: ◦ Interactive Voice Response System (IVRS) ◦ Automated Call Distribution (ACD) ◦ Predictive Call Dialling ◦ Automated Call Dialling ◦ Answering Machine Detection ◦ Text to speech ◦ Speech to text synthesis ◦ Integration with Database systems ◦ Click-to-call for customers ◦ Low-cost communication
  • 13. Getting started Several solutions allow you to start a VoIP network within no time. ◦ Best open-source software – Asterisk ◦ Hardware – Cisco VoIP products ◦ Best proprietary software – Microsoft Lync (for enterprise), Skype (for consumers)
  • 14. Asterisk WO RL D’ S B EST O P E N S O U RC E S O F TWA RE PBX
  • 15. Asterisk ◦ Works on popular Linux distributions ◦ Also available as a standalone Linux distribution called AsteriskNow. ◦ Supports VoIP.
  • 16. Automated Attendant ◦ A “sweet voice” that greets you when you call a number. ◦ Mostly plays a message and asks you to dial extension number of the person ◦ May be, takes the voice message too!
  • 17. How Asterisk works PSTN Line
  • 18. Asterisk features IVR AMI AGI Dialplans Voicemail Call routing ACD Automated Attendant FAX
  • 19. Automated Attendant ◦ A “sweet voice” that greets you when you call a number. ◦ Mostly plays a message and asks you to dial extension number of the person ◦ May be, takes the voice message too!
  • 20. FAX ◦ Asterisk can be used to send and receive Fax. ◦ Only supports TIFF format ◦ There is no “interface”, leaving that part for the “web developers”.
  • 21. Call Routing ◦ Can perform conditional or unconditional routing of calls ◦ Can route calls to local or international numbers too! ◦ Works within the LAN also.
  • 22. Voicemail ◦ Records caller’s message and saves in a sound file
  • 23. Dialplans ◦ Structured sequences of commands that are fired when a phone call is received ◦ Dialplans can be used to invoke native Asterisk commands or even system commands. ◦ Typical dialplan would play “music-on-hold” while the agents are too busy to answer the call.
  • 24. Automated call distribution ◦ Asterisk will distribute the calls based on pre-decided sequence between a queue of agents ◦ The sequence can be First-come-first-serve, Round robin or even a random one.
  • 25. AMI ◦ Asterisk Management Interface. ◦ Set of APIs that allow you to control Asterisk server from remote location.
  • 26. AGI ◦ Asterisk Gateway Interface. ◦ You can run your own C/C++/C#/Python/Ruby/Php/Shell scripts etc when a phone call is received. ◦ Most powerful feature!
  • 27. IVR ◦ Interactive Voice Response ◦ Grabs the DTMF tones from the caller to give a “menu-driven” interactive experience ◦ You see this in mostly all customer support centers
  • 28. Career in VoIP ◦ VoIP is the Future. ◦ Asterisk is the best way to get started with VoIP ◦ VoIP career is a recession-proof career for students of CE/IT as well as EC because ◦ No programming knowledge necessary ◦ Basic networking knowledge will be enough ◦ Rest, you can figure out. ◦ Some certifications – CISCO, EC-Council, etc.
  • 29. Thank you MAIL ME ON KAUSHAL@PRATIKAR.COM