2. Vakhtang Assatrian Asia Communications TSP Lead, Microsoft
Skype for Business voice interoperability master class
Vakhtang Assatrian Asia Communications TSP Lead, Microsoft
PRD336

3. Agenda Standards Based Voice Interop
Interoperability modelling for Voice
We Call it ….

4. Standards Based Voice Interop

5. Foundational Concepts
Signaling
Information exchange concerning establishment and control of a communications session between two endpoints
Media
The modality session or payload handled by a coder/decoder (codec)
Peer Sessions
Two-party communications paths where media is sent directly between caller and callee
workloads: Voice, Video, Sharing
Conferences
Multiparty sessions where all participants send media to a conferencing server

6. Voice Codecs Voice codecs
Microsoft Ignite 2015
4/27/2017 8:09 AM
Voice Codecs
Voice codecs
Human Voice Audio frequency range 80 Hz to 14 kHz
Narrowband | 8Khz [+4Khz/-4Khz]
(Audio frequency range 300 Hz to 3.4 kHz)
Wideband | 16Khz [+8Khz/-8Khz]
(Audio frequency range 50 Hz to 7 kHz)
Silk | Default Codec
RT-Audio | for back-compatibility
G711 | PSTN
G722 | Conferencing
Siren | Conferencing
© 2015 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

7. Network Bandwidth Requirements
Microsoft Ignite 2015
4/27/2017 8:09 AM
Network Bandwidth Requirements
Audio codec
Scenario
Audio payload bit rate (KBPS)
Bandwidth audio payload and IP header only (Kbps)
Bandwidth audio payload, IP header, UDP, RTP and SRTP (Kbps)
Bandwidth audio payload, IP header, UDP, RTP, SRTP and forward error correction (Kbps)
RTAudio Wideband
Peer-to-peer
29.0
45.0
57.0
86.0
RTAudio Narrowband
PSTN
11.8
27.8
39.8
51.6
G.722
Conferencing
64.0
80.0
95.6
159.6
G.722 Stereo
128.0
144.0
223.6
G.711
92.0
156.0
Siren
16.0
32.0
47.6
63.6
SILK Wideband
36.0
52.0
100.0
26.0
42.0
54.0
20.0
48.0
68.0
SILK Narrowband
13.0
41.0
Source:
© 2015 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

8. Interoperability building blocks
Voice
Skype for Business Front End Server
Users / Clients
Tel: URI | Reverse Number Lookup
Mediation Server
PABX
AD DID
Gateway

9. Interop modelling for Voice

10. Do not start with Architecture
The missing link
Do not start with Architecture
Start with User and Services consumption modelling

11. Interop Approaches and End Goal
Which capability to be delivered to your business
What makes most impact?
Collaboration drives productivity
User profiles
Phased approach for deployment
What is the end-goal

12. Interoperability modelling : Client & Server sides
Microsoft Ignite 2015
4/27/2017 8:09 AM
Interoperability modelling : Client & Server sides
RCC Integration
Client Side Integration
Call via Work
SfB user
PABX user
SfB user
PABX user
SfB user
Voice
PABX user
Client API
CSTA Gateway
Gateway *
SfB Server
PABX
SfB Server
PABX
Gateway Integration
Direct SIP Integration
Hybrid & Cloud PBX
SfB user
PABX user
SfB user
PABX user
SfB user
SfB Online user
Voice
Gateway
Gateway
SfB Server
PABX
SfB Server
PABX
SfB Server
© 2015 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

13. Voice Interop | Client Side : plug-in
No large-scale customer deployments (Pilots only)
Isn’t free, additional licenses may be required
Complex Integration
Harder to support, higher TCO
Disjointed user experience, less options
Client Side Integration
SfB user
Client API
SfB Server
PABX

14. Voice Interop | Server Side : Remote Call Control
What you get
Click to Call for PABX phone and binary presence in Lync Server (Interop uses ECMA standard TR/87 for CSTA over SIP)
In/Outbound calling (hold, transfer, Caller ID)
Call via desk phone
Call via Lync (to Lync)
What you miss
Escalate to Lync multi-party audioconf (Multi party just on your phone is still possible)
Receive calls at home, on the road
(voice always on Desk phone)
Synchronise Do Not Disturb
Escalate inbound call to desktop sharing
No delegation & No Enterprise Voice
There is no certification for interop program for RCC
No investment on either PABX or Microsoft
Generally available from major PABX manufacturers through their presence engines
RCC Integration
SfB user
PABX user
CSTA Gateway
SfB Server
PABX

15. Voice Interop | Server Side : Gateway / Direct
Most basic form of interop
Allows Direct Calling
Gateway Integration - Also deployed on non SIP capable PABX
Best of both PABX and Skype for Business
Gateway Integration
Direct SIP Integration
SfB user
PABX user
SfB user
PABX user
Gateway
SfB Server
PABX
SfB Server
PABX

16. Voice Interop | Server Side : Gateway interop
Skype for Business infrastructure
Voice Gateway “Upstream Deployment”
Voice Gateway “Downstream Deployment”

17. Voice Interop | Server Side : Gateway Upstream
Skype for Business infrastructure
Voice Gateway “Upstream Deployment”

18. Voice Interop | Server Side : Gateway Downstream
Skype for Business infrastructure
Voice Gateway “Downstream Deployment”

19. Voice Interop | Server Side : Call via Work
Enterprise Voice for PABX Users
Skype for Business users can make voice calls using any PSTN phone, including existing PABX endpoints
Leverages existing Direct SIP connectivity between PABX systems and Skype for Business
User experience
Skype for Business dials out to PSTN or desk phone number to connect user, then connects with far-end destination
Features
Presence update and call control from Skype for Business client
Mid-call control capabilities preserved on PABX phone
Does not have Inbound experience
Not available for Lync Online
Call via Work
SfB user
Voice
PABX user
Gateway *

20. Voice Interop | Server Side : Call via Work
Outbound Call to External User
1* SfB user A initiates a call to PSTN
2* UCWA places the initial call to desk phone
3* PABX rings the desk phone of SfB user A
4* Once answered, UCWA places second call to PSTN
5* Ring back is provided to SfB user desk phone
6* Once PSTN answers, call is connected 6
6: Audio
Voice 4 4 2 1 5 3
SfB user A
PABX user A

21. Voice Interop | Server Side : Call via Work
Outbound Call to Internal User
1* User A initiates a call to user B
2* UCWA places the initial call to desk phone
3* PABX rings the desk phone of user A
4* Once answered, UCWA places second call to user B
5* Since user B is enabled for CvW and set Simulring to their own desk phone, ms-skipRnl header is used to force another call out to user B’s desk phone
6* Once user B answered on Skype for Business client or desk phone, call is connected 5 2 1 4 5 3
SfB user A
SfB user B
6: Audio
PABX user A
PABX user B

22. Voice Interop | Server Side : Call via Work
Inbound Call to SfB User
1* PSTN user calls SfB User A
2* PABX or Skype for Business Server receives the call
3* If Skype for Business Server receives the call, SfB user A’s endpoint is alerted
4* Since user A is enabled for CvW and set to sim-ring their own desk phone, the ms-skipRnl header is used to force a call out to user A’s desk phone
5* PABX rings the desk phone of SfB user
6* Audio is established 1
6: Audio
Voice 2 3 4 3 5
SfB user A
PABX user A

23. Voice Interop | Server Side : Call via Work
Inbound call from desk phone
1* User A initiates a call to user B
2* PABX rings the desk phone of user B
3* User B answered desk phone, call is connected 2 1
SfB user A
SfB user B
3: Audio
PABX user A
PABX user B

24. Voice Interop | Server Side : Call via Work
Inbound call to desk phone
1* External User initiates the call
2* PABX rings the desk phone of user A
3* User A answered desk phone, call is connected 1
Voice
3: Audio 2
SfB user A
PABX user A

25. We Call it …

26. We call it … Skype for Business hybrid
In the context of Skype for Business hybrid means that a deployment of Skype for Business on-premises and in Office 365 share the same SIP domain(s). (ex called “split-domain”)
In order to achieve Skype for Business hybrid, a hybrid configuration between Skype for Business on-premises and Skype for Business Online needs to be established. Skype for Business hybrid is also a requirement to enable on-premises users for features such as Skype Meeting Broadcast
Skype Meeting Broadcast
“Skype Meeting Broadcast” allows you to stream meetings to up to 10,000 users via Office 365. In order to leverage Skype Meeting Broadcast users can be hosted online or on-premises, but for on-premises users you have to establish Skype for Business Hybrid
This feature is currently in Preview
PSTN Conferencing
With “PSTN conferencing,” Microsoft will provide PSTN numbers for to dial in to and out from Skype for Business meetings. PSTN users will directly connect to the Skype Meeting. Only users hosted in Skype for Business online can use this feature.
PSTN conferencing is currently in Preview for US only

27. We call it …
Cloud PBX
“Cloud PBX” allows users hosted in Office 365 to place and receive PSTN calls. There are two flavours of it: “Cloud PBX with PSTN Calling” and “Cloud PBX with on-premises PSTN connectivity”
Cloud PBX with PSTN Calling
Microsoft will provide phone numbers and telephony features from Office 365. While this currently offers only a subset of on-premises Enterprise Voice features, and only in limited regions, both features and regions will expand over time.
This feature is currently in Preview for US customers only
Cloud PBX with on-premises PSTN connectivity
Allows users in Skype for Business online to utilise PSTN connectivity via on-premises PBX, SIP Trunk, or qualified gateway to E1/T1 lines
This feature will soon become available worldwide

28. Cloud PBX with On-Premises PSTN
Cloud PBX with SfB Server
ADFS AD
SfB user
SfB Online user
Azure Active Directory (AAD) connect
Azure AD Tenant
Cloud PBX
Voice
SfB Online Front End Server
SfB Front End Server
Mediation Server
Gateway
SfB Server
OnPrem Full Topology
Front End: SfB 2015, Lync 2013, Lync 2010 (CU October 2012)
Edge: SfB 2015, Lync 2013
Mediation: SfB 2015, Lync 0213, Lync 2010 (CU October 2012)
SfB Edge Server
SfB Online Edge Server
Voice
Gateway

29. Cloud PBX with On-Premises PSTN
Cloud PBX with no SfB Server
ADFS AD
SfB user
SfB Online user
Azure Active Directory (AAD) connect
Azure AD Tenant
Cloud PBX
Voice
SfB Online Front End Server
CMS
Mediation Server
Gateway
OnPrem Minimum Topology
Edge Server: Access Edge; SIP Stack, Media Relay, MRAS, Outbound Routing
CMS Server Role
Mediation Server
SfB Edge Server
SfB Online Edge Server
Voice
Gateway

30. Interoperability modelling : Client & Server sides
Microsoft Ignite 2015
4/27/2017 8:09 AM
Interoperability modelling : Client & Server sides
RCC Integration
Client Side Integration
Call via Work
SfB user
PABX user
SfB user
PABX user
SfB user
Voice
PABX user
Client API
CSTA Gateway
Gateway *
SfB Server
PABX
SfB Server
PABX
Gateway Integration
Direct SIP Integration
Hybrid & Cloud PBX
SfB user
PABX user
SfB user
PABX user
SfB user
SfB Online user
Voice
Gateway
Gateway
SfB Server
PABX
SfB Server
PABX
SfB Server
© 2015 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

31. Session Takeaways One Size doesn’t fit all Key:. Profile your users
Session Takeaways One Size doesn’t fit all Key: Profile your users Understand consumption models Know your end goal

32. Questions

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34. Continue your Ignite learning path
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