Jon "maddog" Hall: Open Telephony

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Jon "maddog" Halls foredrag under GoOpen 2009

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Jon "maddog" Hall: Open Telephony

  1. 1. Open Telephony: Freedom Greater Than A Sum Of Its Parts By Jon “maddog” Hall Linux International Copyright Linux International 2009
  2. 2. Just For Fun http://www.youtube.com/watch?v=WGjzm6hzXaA Copyright Linux International 2009
  3. 3. Needed For Telephony: Then Copyright Linux International 2009
  4. 4. Needed For Telephony: Then Copyright Linux International 2009
  5. 5. Needed For Telephony Later... Copyright Linux International 2009
  6. 6. Needed For Telephony Later... Copyright Linux International 2009
  7. 7. Needed For Telephony Later... Copyright Linux International 2009
  8. 8. The “Telephone Company” Not a total monopoly....but almost ● They owned everything ● The phones – The telephone lines – The switching equipment – The long distance lines – The employees – You – Copyright Linux International 2009
  9. 9. Along The Way: Trouble In River City Copyright Linux International 2009
  10. 10. And Even More Trouble Copyright Linux International 2009
  11. 11. And Lots Of Trouble Copyright Linux International 2009
  12. 12. Choice.... ....but no control Choose long distance carrier ● Choose handset ● Choose cellphone carrier ● Choose PBX supplier ● but you could not open any box Copyright Linux International 2009
  13. 13. Then One Day.... ...SIP Happens! VoIP! ● Talking over the Internet! ● Copyright Linux International 2009
  14. 14. VoIP IP – already digital, packet switched ● network VoIP – transform voice to digital packets ● and transmit them via IP Quality of Service (QoS) ● packet – loss ● delay ● re-transmission ● Copyright Linux International 2009
  15. 15. Types of VoIP Direct ● Hardware VoIP phone to other VoIP device – Software VoIP phone to other VoIP device – Indirect ● VoIP device to PBX “server” – PBX provides services and/or converts to POTS ● Copyright Linux International 2009
  16. 16. And More Phones Appeared... Copyright Linux International 2009
  17. 17. But They Were Still Closed Copyright Linux International 2009
  18. 18. There Were A Few Softphones Copyright Linux International 2009
  19. 19. Even Some Of Them Were Closed.... Copyright Linux International 2009
  20. 20. What Is WRONG With “Closed”? Supplier goes out of business ● Supplier “loses interest” ● Retires product line – Merges products – Bug fxes - “Its really a computer”! ● Upgrades ● Migrating data from one phone to ● another Copyright Linux International 2009
  21. 21. Choice, But Only Their Choices Upgrading hardware may mean ● software change May have to pay for ISP you do not use ● Limited number of plans ● No real freedom ● Copyright Linux International 2009
  22. 22. PBX Large companies used lots of telephone ● lines to CO 10 to 1 rule – 2000 employees, 200 talking on phone ● lots of calls inside business – Switchboard “CO” inside of business ● Few lines to outside – Copyright Linux International 2009
  23. 23. Services Digital switching ofered services ● Voice mail – Caller ID – Call forwarding – etc. – Ofered by CO – Centrex ● Ofered by in-house PBX ● All of this is POTS – Plain Old Telephone Service Copyright Linux International 2009
  24. 24. Dialing Plan “Please Dial 9.....” Copyright Linux International 2009
  25. 25. For a Long Time: Closed, Proprietary, EXPENSIVE Copyright Linux International 2009
  26. 26. Then, A Major Step Forward! Copyright Linux International 2009
  27. 27. Open PBX: Asterisk Open Source Software ● Runs on Linux, BSD, etc. – Allows better integration to company – software Support of diferent hardware ● interfaces (T1, E1, FXO/FXS, more) Copyright Linux International 2009
  28. 28. Open PBX: Asterisk (Cont.) PBX (including long distance Gateway) ● Call Parking/Forwarding/Waiting, etc. ● Music to hold by ● Voicemail Services with Directory ● Conferencing Server ● Packet Voice Server ● Encryption of Telephone of Fax Calls ● Custom Interactive Voice Response ● Number Translation ● VoIP with diferent protocols (H.323, SIP, IAX, etc.) ● Copyright Linux International 2009
  29. 29. Scenarios “Free” portals to other countries ● Saving money calling from other ● countries One customer, ten salespeople ● Blending of Telephony and “rest of IT” ● Copyright Linux International 2009
  30. 30. Advantages: Not Just Saving Money Avoid “Fork Lift Upgrades” ● Better integration to rest of systems ● Copyright Linux International 2009
  31. 31. Mexico City “Senior Hall, I have done it!” Copyright Linux International 2009
  32. 32. Open Source As Solutions: Additional Advantages Less reliance on one vendor ● Less reliance on ANY vendor ● Distributed risk ● low cost allows more redundancy – Lower cost hardware ● Standard hardware ● Copyright Linux International 2009
  33. 33. Intermixing of Technologies Now it is all “IP” ● Audio – Video – Metadata – Mixing “data” and “control” ● What if we did not use telephony to bring communications..... Copyright Linux International 2009
  34. 34. Intermixing of Technologies Now it is all “IP” ● Audio – Video – Metadata – Mixing “data” and “control” ● What if we did not use telephony to bring communications..... ..what if the phone was really a computer? Copyright Linux International 2009
  35. 35. What If The Handset Was Really Open? Copyright Linux International 2009
  36. 36. What Does It Mean For Hardware To Be “Open”? Published APIs to the hardware ● Published CAD drawings for case ● Published schematics and component ● layout for the Printed Circuit Board Open development forums ● Copyright Linux International 2009
  37. 37. Control = Choice Choice of operating system ● Qt Extended – OpenMoko (OM) – Debian – Android – Others – Choice of transmission ● GSM – WiFi – Copyright Linux International 2009
  38. 38. Control (Cont.) Choice of Carrier ● Choice of ISP ● Choice of Services ● Choice of Support ● Choice of PBX services ● Choice of when to upgrade ● Future choice of handset designs ● Copyright Linux International 2009
  39. 39. Beware “Partially Open” Does the software have to be “signed”? ● Is the carrier “locked”? ● Unlock the phone? ● Will you get updates? – Will you get security patches? – Does the vendor limit the applications? ● Remove WiFi clients? – Remove other applications? – Not publish all the source code? – Copyright Linux International 2009
  40. 40. Sometimes... “It is better to be completely closed than partially open...” - Jon “maddog” Hall, 1995 Copyright Linux International 2009
  41. 41. Control From Handset to Datacenter Copyright Linux International 2009
  42. 42. Sources Of Information: Companies Digium - www.digium.com ● Openmoko - www.openmoko.org ● Koolu - www.koolu.com ● Videos - http://www.youtube.com/user/openkoolu ● Copyright Linux International 2009
  43. 43. Questions? http://www.youtube.com/watch?v=9dVch2nSuBA Copyright Linux International 2009

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