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Jon "maddog" Hall: Open Telephony
 

Jon "maddog" Hall: Open Telephony

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Jon "maddog" Halls foredrag under GoOpen 2009

Jon "maddog" Halls foredrag under GoOpen 2009

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    Jon "maddog" Hall: Open Telephony Jon "maddog" Hall: Open Telephony Presentation Transcript

    • Open Telephony: Freedom Greater Than A Sum Of Its Parts By Jon “maddog” Hall Linux International Copyright Linux International 2009
    • Just For Fun http://www.youtube.com/watch?v=WGjzm6hzXaA Copyright Linux International 2009
    • Needed For Telephony: Then Copyright Linux International 2009
    • Needed For Telephony: Then Copyright Linux International 2009
    • Needed For Telephony Later... Copyright Linux International 2009
    • Needed For Telephony Later... Copyright Linux International 2009
    • Needed For Telephony Later... Copyright Linux International 2009
    • 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
    • Along The Way: Trouble In River City Copyright Linux International 2009
    • And Even More Trouble Copyright Linux International 2009
    • And Lots Of Trouble Copyright Linux International 2009
    • 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
    • Then One Day.... ...SIP Happens! VoIP! ● Talking over the Internet! ● Copyright Linux International 2009
    • 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
    • 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
    • And More Phones Appeared... Copyright Linux International 2009
    • But They Were Still Closed Copyright Linux International 2009
    • There Were A Few Softphones Copyright Linux International 2009
    • Even Some Of Them Were Closed.... Copyright Linux International 2009
    • 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
    • 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
    • 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
    • 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
    • Dialing Plan “Please Dial 9.....” Copyright Linux International 2009
    • For a Long Time: Closed, Proprietary, EXPENSIVE Copyright Linux International 2009
    • Then, A Major Step Forward! Copyright Linux International 2009
    • 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
    • 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
    • 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
    • Advantages: Not Just Saving Money Avoid “Fork Lift Upgrades” ● Better integration to rest of systems ● Copyright Linux International 2009
    • Mexico City “Senior Hall, I have done it!” Copyright Linux International 2009
    • 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
    • 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
    • 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
    • What If The Handset Was Really Open? Copyright Linux International 2009
    • 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
    • Control = Choice Choice of operating system ● Qt Extended – OpenMoko (OM) – Debian – Android – Others – Choice of transmission ● GSM – WiFi – Copyright Linux International 2009
    • 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
    • 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
    • Sometimes... “It is better to be completely closed than partially open...” - Jon “maddog” Hall, 1995 Copyright Linux International 2009
    • Control From Handset to Datacenter Copyright Linux International 2009
    • 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
    • Questions? http://www.youtube.com/watch?v=9dVch2nSuBA Copyright Linux International 2009