Jon "maddog" Hall: Open Telephony

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 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

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 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

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

Jon "maddog" Hall: Open Telephony

by Friprogsenteret on Apr 21, 2009

Accessibility

Categories

Tags

Upload Details

Usage Rights

Statistics

Jon "maddog" Hall: Open Telephony — Presentation Transcript