end of the world presentation
TRANSCRIPT
WebRTCThe End Of The World (As We Know It)
WelcomeTo The Beginning Of The Post-Telephony Era
I’m SteveSteve Sokol, Entrepreneur In Residence /
Director of Strategic Programsat Digium
What is WebRTC?
Photo Credits: Tom Keating - TMC.net, Eric Hernaez - Netsapiens
How does it work?
WebRTC leverages existing VoIPtechnologies
WebRTC exposes communicationsdevelopment to the 20M web developers inthe world
WebRTC sets rules for media, leavessignaling up to the application developer
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Get media streams from camera, mic
Create an “offer” session description
Send the offer to the far-end party
Receive an “answer” session descriptionfrom the far-end party
Discover a path that works by testing allpaths
Send media to the far-end party
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WebRTC Call In A Nutshell
Web Server
Web Browser Web Browser
SRTP Media Streams
Offe
r Sign
aling
(SD
P)O
ffer Signaling (SDP)
Answ
er S
ignali
ng (S
DP)
Answer Signaling (SDP)
HTTP
or W
ebSo
cket HTTP or W
ebSocket
Web Server
Web Browser
SRTP Media Streams
Signa
ling
Signaling
Media ServerGateway
PBX
New JavaScript APIs
Media Capture
Peer-To-Peer Networking
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Creating A Connection
Built-In NAT Traversal using ICE
STUN - Discover network details
TURN - Relay as last resort
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Encoding Media
Audio Codecs
Mandatory: Opus, G.711
Optional Codecs
Video Codecs
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Encrypting Media
Mandatory
Secure Realtime Protocol (SRTP)
SDES vs. DTLS-SRTP Key Brokering
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No mandatory protocol or mechanism
Can be done using SIP or Jingle usingJavaScript libraries
Can be done better using other methods:
WebSockets or XMLHttpRequest transport
Simple JSON signaling
Use a protocol that suits your use caseperfectly, not a protocol built to handle alluse cases adequately
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What About Signaling?
No mandatory signaling protocol is aGOOD THING™
Gives developers absolute control overthe user experience
Avoids the tendency to rebuild the PSTN
Avoids the “federation” issue
Allows for identity to be more than anumber
It’s The Web (Stupid?)
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URL-Based Calling
http://www.digium.com/contact/sales
http://www.digium.com/contact/ssokol
Directory-Based Calling
Linked-In
Corporate LDAP
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“Inside” users will use a web-based ormobile client
“Outside” users will use portal pages torequest access to various resources
People
Departments
Expert Support
Identity can be from email, Facebook,
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You will still need a communicationssystem or a communications service
You (eventually) may not need a “phonecompany”
Prediction: wired and wireless carrierswill become glorified ISPs within the decade
WebRTC will make rich communicationsa 100% “OTT” business
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So, Is It Ready To Use?
Yes and no...
Implementations in Chrome, Mozilla
Not currently interoperable
Great for “controlled environments”
Not yet ready for use by “normal” users
Will be ready by the end of 2013
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Challenges
Mobile Deployments
Large-Scale Multi-Party
Legacy Integration
Codec Selection
Fragmentation (Microsoft’s CU-RTC-Web)
Encryption Keys
Audio Quality / Echo Cancellation
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Future features andenhancements...
Peer-To-Peer Data
Real-Time Text (Captions)
Media Recording
Screen / Desktop / Tab Sharing
Statistics / Monitoring
Possibly low-level APIs
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A few use cases:
Social Media
Call Center Agent Interface
Conferencing & Collaboration
Enhanced Customer Care
Distance Learning
In-Game Communications
Broadcasting
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Big Changes(Welcome To The Post-Telephony Era)
Telephony has been holding backcommunications for the past decade.
SIP was hijacked: what started out as apeer-to-peer system was twisted into“PSTN-Over-IP”
Improvements and price reductions inbandwidth, mobile, web make a real changepossible
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Fully Unified Communications
Integration of communications directlyinto business and social applications
Communications as a feature orfunction rather than as a service
Customized User Experience
Excellent Privacy / Security
Significant Cost Reduction
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Asterisk And WebRTC
Asterisk 11 added ICE, STUN, TURNsupport, WebSocket transport for SIPchannel and other tweaks
You can now create web endpoints usingAsterisk and a JavaScript SIP library
SIPML5
JS-SIP
Asterisk can bridge between WebRTCand legacy communications technologies
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Demo Time!
Future versions of Asterisk will do more:
Recording and playback of audio andvideo
Interfaces for additional / customsignaling protocols
Interactive voice and video applications
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