Presentation for the Voip2day.net conference organized by Avanzada7 in Madrid, Oct 2011. It introduces a few new additions to the SIP framework and points out some ideas for future implementations.

1. Watch out!
The SIP world is changing. OPEN UNIFIED
COMMUNICATION
Don’t stay in the past. ACCORDING TO EDVINA
Olle E.
oej@edvina.net Johansson * oej@edvina.net * Twitter oej
© Copyright Edvina AB, Sollentuna, Sweden 2011. All rights reserved.

2. Me.
Twitter:
@oej
@sipv6
@edvina
Blog:
www.voip-forum.com

3. Latest news
Apple launched a
new phone that you can
talk to.
One year ago I told
you so.
So wake up and listen!

4. Agenda
• Hurry up.
• Don’t stay behind.
• We’re here. And now.

6. REALTIME
I T ’ S A L L A B O U T N OW.

7. Where are we?
• SIP is ten years old
• Mostly used for PSTN over IP
• Narrowband audio
• Insecure implementations
• Insecure deployments

8. BAD!
We can do better.
Our customers deserve better.

9. WE SHOULD BE
ASHAMED!

10. The network is changing.
• We have more smart phones, tablets and other
devices than PCs These devices have multimedia -
video, audio
• Multimedia is changing - wideband, stereo, 7-1, screen
sharing
• The number of users is exploding

11. The network is closing.
• We have no more IPv4 addresses to allocate
• How are we going to build new cloud services, add new
devices and build a larger Internet?
© Copyright 2010, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

12. The network is closing.
• We have no more IPv4 addresses to allocate
• How are we going to build new cloud services, add new
devices and build a larger Internet?
© Copyright 2010, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net
IPv6

13. The network is
falling apart.
• We lack a lot of knowledge about networking out there.
• The NAT and Firewall devices are just good enough to
handle a minimum level of traffic and predeterimed
applications
• Customers need to wake up. Otherwise the clouds will
be rain clouds with dangerous thunderstorms.
© Copyright 2010, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

14. Good news!
There are alternatives

15. Skype
Yet another telco monopoly. Only this time,
it’s Internet-based.

16. Just joking.
Let’s take a look at real alternatives.

17. Building solutions on
IP Asterisk, Asterisk SCF and
telephony
FreeSwitch and...

18. Building solutions on
IP Asterisk, Asterisk SCF and
telephony
FreeSwitch and...
Old stuff

19. Open Unified
Communication
IP Chat Screen
Video Games
telephony Presence sharing
System
integration
Social
networks
RSS ?
SIP
Internet & IP networks

20. Welcome to the
realtime Internet.
The social
multimedia
network.
SIP
Internet & IP networks

21. Welcome to the
realtime Internet.
This is not just
about telephony.
SIP
Internet & IP networks

22. What is SIP?
• A protocol to find each other in
real time
• A protocol to manage sessions
between people

23. What is SIP?
• A protocol to find each other in
real time
• A protocol to manage sessions
between people
REALTIME
I T ’ S A L L A B O U T N OW.

24. Are you
with me?
Are you with me?

25. Bulding this requires
a bit more than good
old SIP INVITE
200 OK
ACK

26. Learn new things.

27. Learn new things.
GIN - pbx
ICE
registrations
SIP outbound SIP identity
RTCweb
GRUU RTP multiplexing
TLS MSRP

28. RTCweb
The new kid
on the block
• Cooperation between the W3C and IETF
• Bidirectional media between browsers
• Audio, video, text
• The platform for new services
• SIP in the browser (listen to Iñaki!)

29. RTCweb The vision
• An open service where we can
communicate freely with each other from
any device and any network
• First wave propably just between users of
the same web service
• Many of us wants open federation - it
requires a shared address space and
protocol

30. RTCweb Dependencies
• The architecture is still discussed
• Will propably depend on ICE, which means
dependencies on TURN/STUN as well
• OverSIP and jsSIP presented here today is a
good example of the future!

31. RTCweb RTCWEB
• Platform for new cool • We’ll still have NAT
applications and firewall issues
• Built into the web • Will it be standardized
browser enough
• Security-enabled from
• Will we need SBCs to
start
handle the
connections?
+ -

32. ICE
ICE
Taking us out of the NAT darkness.

33. ICE Ice: Show me yours, and
I’ll show you mine.
NATted network
• All UAs find all their
SIP addresses, using STUN
SIP
Alice • May allocate an address
using TURN
• Sends all addresses as
candidates in SDP
• Receipient tries to contact
addresses and select best
media path
Turn • Supports both IPv4 and
IPv6
Bob
Media relay • IPv6 UAs allocate IPv4
NATted network Turn address
Cecilia

34. ICE Ice: Show me yours, and
I’ll show you mine.
NATted network
• All UAs find all their
SIP addresses, using STUN
SIP
Alice • May allocate an address
using TURN
• Sends all addresses as
candidates in SDP
• Receipient tries to contact
addresses and select best
media path
Turn • Supports both IPv4 and
IPv6
Bob
Media relay • IPv6 UAs allocate IPv4
NATted network Turn address
Cecilia

35. ICE Ice: Show me yours, and
I’ll show you mine.
NATted network
• All UAs find all their
SIP addresses, using STUN
SIP
Alice • May allocate an address
using TURN
• Sends all addresses as
candidates in SDP
• Receipient tries to contact
addresses and select best
media path
Turn • Supports both IPv4 and
IPv6
Bob
Media relay • IPv6 UAs allocate IPv4
NATted network Turn address
Cecilia

36. ICE
ICE
• Finds the best media path • Takes time at call
between two nodes setup
• Supports IPv4 and IPv6 • Hard for b2bua’s to
deployments support
• Binds SIP+SDP to actual
• Complex for
media
developers
• Used by Microsoft, Apple
(FaceTime), Google
+ -
Hangouts

37. OUTBOUND
SIP Outbound
Stay connected. And reconnect if it fails.
NATted network
SIP
SIP
SIP
Location server/Registrar
Ingres proxys
RFC 5626

38. OUTBOUND
NATted network
SIP
SIP
Client initiated connections
SIP
Location server/Registrar
Ingres proxys
• The client is responsible for keeping the connection open
• Clients has a UUID, device identifier that stays the same - ALWAYS!
• The SIP proxy sees that one device has multiple registrations and use only
one at a time
• The Registrar or Ingres proxy assigns a flow ID that is unique for each
flow
• A dialog stays on one connection until it fails

39. SIP outbound
OUTBOUND
• Makes TLS easier • Adds number of
connections
• Better definition for NAT
traversal support • Not implemented in
many devices
• Identifies devices in a
unique way
• Makes TCP/TLS failover
much, much quicker
+ -

40. Globally Routable device addresses
GRUU
Example.com
SIP
SIP
Alice
The AOR for Alice and Bob
belongs to their proxy. Bob has one Builds on SIP outbound
AOR for multiple UAs. UUID URN’s.
SIP
astritech.com
Bob
NATted network Bob

41. Globally Routable device addresses
GRUU
Example.com
SIP
SIP
Alice
The AOR for Alice and Bob
belongs to their proxy. Bob has one Builds on SIP outbound
AOR for multiple UAs. UUID URN’s.
SIP
astritech.com
Bob
The GRUU points to a device. It is allocated
NATted network at registration and belongs to the domain, thus
Bob can be used globally!

42. GRUU Device URIs
• Makes transfers and • Complex RFC
other SIP in-dialog
functions work across • Adds a bit of
domains complexity to the UA
• A Contact without IPv4/
IPv6 dependencies
• Opens up for multi-
device calls (SPLICES)
+ -

43. GIN
PBX trunk registration
One REGISTER for multiple phone numbers
PBX SIP Trunk
SIP PSTN
• Created by The SIP Forum for SIPconnect 2.0
• RFC 6140
• Only for E.164 phone numbers
• 200 OK to register includes all the phone numbers
• Location server adds one AOR contact binding per number
• Use GRUUs, which depends on SIP outbound

44. GIN
GIN - PBX REGISTER
• Supports current usage • Adds complexity in
by PBX vendors and SIP registrar and client
trunk providers
• Standardizes something
that was no standard
• Cleans up
+ -

45. What’s missing?
Proper solution Implementations
for TLS and a PKI. of DTLS SRTP
key exchange
End to end Management
security. of security and
configurations.

46. What’s missing?
Proper solution Implementations
for TLS and a PKI.of DTLS SRTP
Customers with the
key exchange
guts to do
something
End to end different.
Management
security. of security and
configurations.

47. The next generation
realtime network.
• We’ve learned a lot in 10
years of SIP.
• Why hasn’t the IP phones
changed?
• (Look at Panasonic’s Android SIP
phone for a glimpse of the future.)

48. Ask yourselves the
important question.
Have you become one of the
old PBX-huggers?
The ones that just doesn’t let go.
Why doesn’t mobile office solutions
have blinking lamps and all that stuff?

49. Summary
• IETF realized that NAT is a big issue and
developed GRUU, ICE and Outbound. Use
it.
• A properly architectured SIP architecture
can handle much more than telephony.
• Look at Skype, Microsoft Lync and AG
Projects product suite for inspiration.
• Only the last one is using open
standards!

51. REALTIME
I T ’ S A L L A B O U T N OW.

52. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
The road ahead:
10 bullet points
to remember!

53. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
1. Use Open Network
Protocols
TCP/IP * SIP * XMPP
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

54. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
2. Use Open Source
COOPERATIVE SOFTWARE
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

55. @
OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
3. Use e-mail style
addresses.
One address that rule them all!
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

56. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
4. Implement with
Integrity and Security
BUILDING TRUST FOR NEW SOLUTIONS
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

57. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
5. Implement green
anti-travel
solutions
VIDEO IS IMPORTANT.
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

58. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
6. Corporate Social
Responsibility
Building and connecting to
a network for everyone.
OPEN SOURCE = AVAILABILITY FOR THE 3RD WORLD
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

59. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
7. Everything is and
should be building
blocks
EVERYTHING SHOULD HAVE AN AN OPEN API
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

60. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
8. Don’t disconnect
from the world.
IPv6 NOW
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

61. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
9. Underestimate
yourself
You just don’t know about the future
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

62. OPEN UNIFIED
COMMUNICATION
ACCORDING TO EDVINA
10. Think different.
The new telephony platform is not about telephony.
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

64. REALTIME
I T ’ S A L L A B O U T N OW.

65. Thank you!
Any questions?
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net

66. PS. New training classes
coming soon.
The Asterisk SIP Masterclass has been running for over five
years. Time for a change.
Please tell me what you need.
?
The Realtime SIP Labs
Bring your own stuff and we’ll test interoperability
Security, IPv6, video, NAT traversal, wideband
© Copyright 2011, Edvina AB, Sollentuna, Sweden. All rights reserved. Approved distribution only. info@edvina.net