Your SlideShare is downloading. ×
Kevin Withnall VoIP In 5 Minutes with Asterisk
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Kevin Withnall VoIP In 5 Minutes with Asterisk


Published on

Published in: Technology, Business
  • Be the first to comment

  • Be the first to like this

No Downloads
Total Views
On Slideshare
From Embeds
Number of Embeds
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

No notes for slide


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