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Johan DelimonMCM Lync Server / MVP Lync Server / MCTOrdina Belgium N.V.Johan.delimon@ordina.be @jdelimon

Lync & Skype Interop

V2 Deep Dive

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@enowconsulting

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ENow Software

ENowSoftware

ENowSoftware.com

“Simplest way to keep Lync healthy”

Some of ENow’s Loyal Customers

About ENow• Microsoft Silver ISV & Messaging• Profitable, privately-help corporation founded in 2004• Software architected by MVPs with >15 years experience in high-end Microsoft

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Johan DelimonMCM Lync Server / MVP Lync Server / MCTOrdina Belgium N.V.Johan.delimon@ordina.be @jdelimon

Lync & Skype Interop

V2 Deep Dive

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http://www.pro-lync.be

http://www.pro-exchange.be

http://www.pro-lync.be

http://www.pro-office365.be

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A W A R D W I N N I N G M O N I T O R I N G & R E P O R T I N G S O L U T I O N S

Agenda

Skype & Lync

Interop Basics

Interop Version 1 (Audio)

Interop Version 2 (Video)

Resources

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A W A R D W I N N I N G M O N I T O R I N G & R E P O R T I N G S O L U T I O N S

A W A R D W I N N I N G M O N I T O R I N G & R E P O R T I N G S O L U T I O N S

A W A R D W I N N I N G M O N I T O R I N G & R E P O R T I N G S O L U T I O N S

IndividualsTeams &

Small OrganizationsMedium-sized & Large

Organizations

Specialized by need, universal by reachConnecting everyone with rich communications

Microsoft provides Universal Communications: enabling any person to reach anyone, from anywhere, on any device, and in the way they choose.

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Skype Announcements in 2014• Introducing Skype for Business

• Video calling between Skype and Lync available now

• Skype Translator Preview – An Exciting Journey to a New Chapter

in Communication

• Skype for Broadcast

• Skype loves bringing groups together – with FREE group video calling

• Skype group screen sharing is free

• Introducing Skype document chat in Office Online

• Save and share your videos with Skype Qik

• Skype Brings the World Closer Together, One Inbox at a Time

• Please welcome Skype for Web (Beta)

http://blog.enowsoftware.com/solutions-engine/bid/187072/Skype-Lync-Part-I-Announcements

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Familiar experience and

user love of Skype and the security, compliance, and

control of Lync.

Connecting people everywhere

to achieve more, together.

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Video calling between Skype and

Lync available now

http://blogs.office.com/2014/12/05/video-calling-skype-lync-available-now/

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Setting up Lync-Skype Connectivity

• Domain:

– Provision your organization for federation using https://pic.lync.com,

provide your domain(s) & FQDN(s).

• Certificate:

– Set up your Lync edge for federation, including public certificate.

• Policies:

– Use the Lync Server Control Panel or PowerShell to enable public IM

connectivity, partner discovery, partner domain discovery.

Note1: If you have Messenger connectivity working already, you’re done!Note2: There is no additional charge for activating Lync-Skype Connectivity

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Step 1. Register your domain

This tells our service where to send inbound

messages and tells Skype & Messenger that your

Lync domain is available for connectivity.

Go to https://pic.lync.com to provision your domain for Skype connectivity.

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O365 Configuration and Admin

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Skype Privacy

Skype maintains a Security Portal: http://www.skype.com/intl/en-us/security/

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Lync Settings

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Microsoft Accounts (MSAs) and Skype

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How do I add a Lync contact to Skype?

To add a Lync contact– Type the Lync user address in Skype Search

– Select the Lync contact

– Select <Add to Contacts>

Log in with MSA

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Adding Lync User in Skype

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Skype user adds Lync user

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Add a Skype contact to Lync

• Add Contact -> Add a Contact Not in My Organization

• Select Skype

• Type in MSA & Assign a Group

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Add a Skype contact to Lync

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Presence Expectations• Skype Presence Modes

– Online

– Away

– Do Not Disturb

– Invisible

– Offline

– Auto (“Show me as Away when I’ve been

Inactive from <<fill-in>> minutes”)

• Lync Presence Modes– Available

– Away

– Busy

– Do Not Disturb

– Be Right Back

– Off Work

– Appear Away

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Lync & Skype Interop Enhancements

Lync-Skype Audio (v1)

• Add to contact list/Block users [Lync to MSA]

• Block Skype Connectivity

• Instant Messages and Presence Updates

• P2P Audio Call

• Escalate IM session to Audio Call

• Hold/Resume, Mute/UnMute, Transfer

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Connectivity v1 call flow

Lync Online – Office 365

Federation Cloud

signal path

media path

Legend

Call initiated with connection details

Call accepted and returns connection details

Media connection is established

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Lync-Skype Connectivity V1

Contacts

MSAs)

Sessions

Not included:

Router

Lync-Skype Connectivity opens a new communications door for enterprises searching for inventive and differentiated opportunities for new customer acquisition, customer retention, and business-to-consumer communications.

chat & audio

Chat & Audio

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Audio SDP Offers & Codecs

m=audio 51819 RTP/AVP 117 114 104 9 112 111 0 8 116 115 103 97 13 118 101

a=rtpmap:117 G722/8000/2

a=rtpmap:114 x-msrta/16000

a=rtpmap:104 SILK/16000

a=rtpmap:9 G722/8000

a=rtpmap:112 G7221/16000

a=rtpmap:111 SIREN/16000

a=rtpmap:0 PCMU/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:116 AAL2-G726-32/8000

a=rtpmap:115 x-msrta/8000

a=rtpmap:103 SILK/8000

a=rtpmap:97 RED/8000

a=rtpmap:13 CN/8000

a=rtpmap:118 CN/16000

a=rtpmap:101 telephone-event/8000

Preference Order

Even though the actual sampling rate for G.722 audio is 16,000 Hz, the RTP clock rate for the G722 payload format is 8,000 Hz because that value was erroneously assigned in RFC 1890 and must remain unchanged for backward compatibility. The octet rate or sample-pair rate is 8,000 Hz.(4.5.2 G.722)

Wid

eb

and

Narro

wb

and

RTAudio Wideband & Narrowband

Skype Codec Wideband & Narrowband

G.711

The redundant audio payload format "RED" is specified by RFC 2198 [17]. It defines a means by which multiple redundant copies of an audio packet may be transmitted in a single RTP stream (4.5.16 RED)

http://tools.ietf.org/html/rfc3551 RTP Profile for Audio and Video Conferences with Minimal Control

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User-Agent: RTCC/5.0.0.0 MediationServer

User-Agent: UCCAPI/15.0.4675.1000 OC/15.0.4675.1000 (Microsoft Lync)

m=audio 50804 RTP/SAVP 9 0 8 115 13 118 97 101

a=candidate:5 1 UDP 184547327 134.170.96.15

50804 typ relay raddr 134.170.96.78 rport 56924

a=candidate:5 2 UDP 184546814 134.170.96.15

50006 typ relay raddr 134.170.96.78 rport 56925

a=remote-candidates:

1 84.195.252.124 5364

2 84.195.252.124 5365

a=rtpmap:9 G722/8000

a=rtpmap:0 PCMU/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:115 x-msrta/8000

From: <sip:johan.delimon@live.com>;epid=165FFA712D;tag=77e528eb

To: <sip:johan@delimon.be>;epid=df8b299e1c;tag=cfe51e3b51

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G7.22

SILK

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Lync & Skype Interop Enhancements

Lync-Skype Audio (v1)

• Add to contact list/Block users [Lync to MSA]

• Block Skype Connectivity

• Instant Messages and Presence Updates

• P2P Audio Call

• Escalate IM session to Audio Call

• Hold/Resume, Mute/UnMute, Transfer

Lync-Skype Video (v2)

• Everything in v1

• Make Audio + Video Calls

• Reject Video for inbound calls

• Escalate Audio only calls by adding video

• Pause/Resume Video

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Lync & Skype interop• IM, Presence & Audio in May 2013 (v1)

• Video calling with Lync in December 2014 (v2)

• Skype for Windows desktop client v7.0.x.100 only

• Other platforms/clients coming later

• Built-in security for signaling using TLS and media using SRTP

• Standards-based firewall traversal using STUN, TURN and ICE

• Industry standard H.264 SVC codec

• SILK audio codec http://blog.enowsoftware.com/solutions-engine/bid/187073/Skype-Lync-Part-II-Video-Calling

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Enterprise NAT Traversal MechanismStun/Turn/ICE

Router

❶ Host Candidate – Likely to fail

❷ STUN Candidate

❸ TURN Candidate – Edge Relay

❶❷

❸

SIP uses the source and target IP addresses to establish a session. Network Address Translation (NAT) modifies IP addresses as packets transit onto the public internet and thereby renders the INVITE invalid. STUN, TURN and ICE resolve such session/NAT issues.

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• TLS

• SRTP

• SILK

• RT Audio

• STUN

• TURN

• ICE

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Demo : Lync & Skype Call – with Video!

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Connectivity v2 call flow

Lync Online – Office 365

Federation Cloud

signal path

media path

Legend

Call initiated with connection details

Call accepted and returns connection details

Media connection is established

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Architecture improvements

• New Skype cloud for improved call set up and control.

• New gateway connects Skype cloud to Lync Online for

signaling and call control.

• Uses Lync’s federation access architecture that routes to

both v1 and v2 clouds.

• V1 connectivity will continue to exist as traffic gradually

increases on V2 connectivity.

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V2 Details

User-Agent: RTCC/6.0.0.0 LyncSkypeGateway2/1.0.214.0

User-Agent: UCCAPI/15.0.4667.1000 OC/15.0.4667.1000 (Microsoft Lync)

From: <sip:johan.delimon@live.com>;epid=165FFA712D;tag=77e528eb

To: <sip:johan@delimon.be>;epid=df8b299e1c;tag=cfe51e3b51

m=audio 24214 RTP/SAVP 114 9 112 111 0 8 116 115 97 13 118 101

a=candidate:1 1 UDP 2130706431 192.168.0.109 24214 typ host

a=candidate:1 2 UDP 2130705918 192.168.0.109 24215 typ host

a=remote-candidates:1 192.168.0.114 5364 2 192.168.0.114 5365

a=rtpmap:114 x-msrta/16000

a=rtpmap:9 G722/8000

a=rtpmap:112 G7221/16000

a=rtpmap:111 SIREN/16000

a=rtpmap:0 PCMU/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:115 x-msrta/8000

a=rtpmap:122 X-H264UC/90000

a=rtpmap:121 x-rtvc1/90000a=rtpmap:123 x-ulpfecuc/90000

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SILK

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Call connectivity• All AV calls flow through the same federation environment set up in v1

• Lync SIP/SDP signalling is terminated at the Skype Cloud edge and translated into Skype proprietary protocols and vice versa

• Lync to Skype Calls – AV calls are forked internally to both v1 and v2 clients

– Mediation server supports only Audio

– New Lync Gateway services all v2 calls.

• Skype to Lync Calls – v2 clients will route calls through v2 Skype Cloud > Lync federation environment >

Lync client

– v1 clients will route calls through v1 Skype Cloud > Lync federation environment > Lync client

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Lync-Skype Connectivity V2

ContactsMSAs

Sessions

voice (SILK) Video (H.264)

• Encryption with TLS and sRTP• NAT Traversal with Stun/Turn/Ice

Not included:

Router

With version 2, we now use standard NAT traversal protocols, Signalling is encrypted with TLS and media uses sRTP directly between callers. We’ve standardized Codecs between the clients and have added Video !!

Chat, audio,Video

Chat, Audio,Video

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Platform Support at GA

MICROSOFT CONFIDENTIAL – INTERNAL ONLYMICROSOFT CONFIDENTIAL – INTERNAL ONLY

Client v1 v2 NotesSkype Win32 yes yes Summer

Skype MAC OSX yes yes Summer

Skype Win Modern yes yes Future Release

Skype iOS yes yes Future Release

Skype Android yes yes Future Release

Skype WinPhone 8 yes yes Future Release

Skype Xbox yes yes Future Release

Skype Outlook.com yes yes Future Release

Lync 2013 CU4 yes yes

Released with SILK audio codec

support - (ver 15.0.4551.1005) -

Windows Desktop Client Only

Lync MAC yes no H.264 not supported, investigating

Lync iOS yes yes Future Release

Lync Android yes yes Future Release

Lync WinPhone 8 yes yes Future Release

Lync Win Modern yes yes Future Release

Lync Web App no no Out of Scope

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Legacy Lync Clients

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ResourcesMicrosoft Message Analyzer

http://www.microsoft.com/en-us/download/details.aspx?id=44226

Skype & Lync Part I: Announcements

http://blog.enowsoftware.com/solutions-engine/bid/187072/Skype-Lync-Part-I-Announcements

Video calling between Skype and Lync available now

http://blogs.office.com/2014/12/05/video-calling-skype-lync-available-now/

Microsoft Lync Server 2013 Debugging Tools

http://www.microsoft.com/en-us/download/details.aspx?id=35453

Video calling between Skype and Lync first look & the details on a surprising Audio codec being

used

http://www.pro-lync.be/blogs/lync2013/archive/2014/12/05/video-calling-between-skype-and-

lync-first-look-amp-the-details-on-a-surprising-codec-being-used.aspx

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