Unc312 microsoft communications server “14” lync 2010 network considerations

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Unc312 microsoft communications server “14” lync 2010 network considerations

  1. 1. Voice Quality
  2. 2. Voice Quality Issues Call Reliability Audio Quality Dropped Failed Broken Delayed Distorted Low One Way Noise Echo Calls Calls Up Audio Audio Audio Volume Audio Network Core Performance Gateways Devices
  3. 3. Network Considerations
  4. 4. Network Conditions Acceptable Quality Optimal Quality Interarrival packet jitter (avg) ≤ 10ms ≤ 5ms Interarrival packet jitter(max) ≤ 80ms ≤ 40ms Packet loss rate (avg) ≤ 10% ≤ 2% Network latency RTT ≤ 200ms ≤ 120ms
  5. 5. SIP SRTP / RTCP 1 2 3 4 5 1 2 3 4 5
  6. 6. SIP SRTP / RTCP 1 2 4 5 1 2 4 5 1 2 3 4 5 F E C 1 2 2 3 3 4 4 5
  7. 7. Codec RTAudio - RTAudio - Siren G.711 G.722 RTVideo - RTVideo - RTVideo - 8Khz 16 Khz CIF 15fps VGA 30fps HD 30fps Typical Bandwidth 25.9 kbps 34.8 kbps 22 kbps 59.8 kbps 42.8 kbps 203 kbps 492 kbps 1230 kbps – No Fec Upper Limit – No FEC 39.8 kbps 57 kbps 51.6 kbps 92 kbps 99.6 kbps 250 kbps 600 kbps 1500 kbps Upper Limit - FEC 51.6 kbps 86 kbps 67.6 kbps 156 kbps 163.6 kbps n/a n/a n/a Bandwidth numbers include overhead for framing, encryption, and IP routing information in addition to actual encoded media and based on 20ms audio p-times Typical bandwidth values bit rate are measurements of typical activity level values under good network conditions (i.e. no FEC for audio sessions) Typical BW number can be used for capacity planning to assess if a network should be considered „right provisioned‟ Average can be used for initial capacity planning where most calls are within enterprise network Monitor actual Bandwidth usage of UC sessions and then refine
  8. 8. Example Scenario CAC Profile Type WAN Link Per Available Audio WAN Link per Session Available Video Session Audio Limit Video Limit Optimized for Session 60 kbps RTAudio NB + FEC 350 kbps RTVideo – CIF (15fps) Count Siren + FEC RTVideo – Pano (15fps) (w/ Wide Band P2P) RTAudio WB (no FEC) Balanced 95 kbps (Above plus) 600 kbps (Above plus) RTAudio WB + FEC RTVideo – VGA (30fps) G.711 (no FEC) G.722 (no FEC) Optimized for Quality 165 kbps (All Above plus) 1500 kbps (All Above plus) G.711 + FEC RTVideo – HD (30fps) G.722 + FEC WAN Link Policy: Audio Session Limit = 60 kbps RT Audio WB (no FEC) Redmond New Orleans
  9. 9. Example Scenario CAC Profile Type WAN Link Per Available Audio WAN Link per Session Available Video Session Audio Limit Video Limit Optimized for Session 60 kbps RTAudio NB + FEC 350 kbps RTVideo – CIF (15fps) Count Siren + FEC RTVideo – Pano (15fps) (w/ Wide Band P2P) RTAudio WB (no FEC) Balanced 95 kbps (Above plus) 600 kbps (Above plus) RTAudio WB + FEC RTVideo – VGA (30fps) G.711 (no FEC) G.722 (no FEC) Optimized for Quality 165 kbps (All Above plus) 1500 kbps (All Above plus) G.711 + FEC RTVideo – HD (30fps) G.722 + FEC WAN Link Policy: Audio Session Limit = 60 kbps RT Audio WB (No FEC) Internet Redmond New Orleans
  10. 10. Example Scenario CAC Profile Type WAN Link Per Available Audio WAN Link per Session Available Video Session Audio Limit Video Limit Optimized for Session 60 kbps RTAudio NB + FEC 350 kbps RTVideo – CIF (15fps) Count Siren + FEC RTVideo – Pano (15fps) (w/ Wide Band P2P) RTAudio WB (no FEC) Balanced 95 kbps (Above plus) 600 kbps (Above plus) RTAudio WB + FEC RTVideo – VGA (30fps) G.711 (no FEC) G.722 (no FEC) Optimized for Quality 165 kbps (All Above plus) 1500 kbps (All Above plus) G.711 + FEC RTVideo – HD (30fps) G.722 + FEC WAN Link Policy: Audio Session Limit = 60 kbps RT Audio NB (+ FEC) Internet Redmond New Orleans
  11. 11. 1440x900 1280x800 1680x1050 1920x1200 Screen Size 1 Mbps 512 Kbps 384 Kbps 768 Kbps Acceptable 2000 5000 1000 3000 4000 0 19:21,1 29:36,1 39:51,1 50:06,1 00:21,1 10:36,1 20:51,1 31:06,1 41:21,1 51:36,1 01:06,0 2 Mbps Optimal 1.5 Mbps 3.5 Mbps 06:06,1 2.75 Mbps 11:21,1 16:21,1 22:51,1 33:06,1 43:21,1 53:36,1 03:51,1 Kilobits/sec sent by Sharer 14:06,1 24:21,1 34:36,1 44:51,1 55:06,1 05:21,1
  12. 12. Media Type Per Hop Queuing and Notes: Behavior Dropping Audio EF Priority Queue Low loss, low latency, low jitter, assured bandwidth Pair with WAN Bandwidth Policies on constrained links Video AF41 BW Queue + DSCP Class 4. Low drop priority. WRED Pair with WAN Bandwidth Policies on constrained links SIP Signaling CS3 BW Queue Class 3. Bandwidth allocation should be sufficient to avoid drops App Sharing AF21 BW Queue + DSCP Class 2. Low drop priority. WRED Pair with End User Policy Caps File Transfer AF11 BW Queue + DSCP Class 1. Low drop priority. WRED Pair with End User Policy Caps
  13. 13. Core Performance, Devices and Gateways
  14. 14. In Microsoft Communications Server “14” media for calls within a site can go directly to PSTN Gateway Improves audio quality and reduces numbers of servers Today 5pm UNC314 CS “14”: Voice Deployment
  15. 15. Thursday 9:45AM - UNC208 CS “14”: What's New in Devices
  16. 16. E2E Experiences: Admins
  17. 17. Weds 1.30pm - UNC316 - CS “14”: Monitoring and Reporting
  18. 18. E2E Experiences: End Users
  19. 19. Admin Extensibility
  20. 20. Succeed at Voice Quality with Microsoft’s software powered Unified Communications and redefine what it means to communicate in your business!
  21. 21. Monday 4:30PM UNC320 CS “14”: What's New in Communicator “14” Experience & Backend Amit Gupta 9:45AM UNC311 CS “14”: Architecture Mahendra Sekaran 1:30PM UNC313 CS “14”: Voice Architecture and Planning for High Availability Jamie Stark Tuesday 3:15PM UNC312 CS “14”: Network Considerations Neil Deason 5:00PM UNC314 CS “14”: Voice Deployment Jamie Stark 8:00AM UNC318 CS “14”: What's New in Conferencing Experience & Backend Cameron & Tim 9:45AM UNC317 CS “14”: Management Experience Anand & Cezar Wednesday 11:45AM UNC321 CS “14”: Interoperability: Voice, Video, Conferencing, IM, & Presence Francois Doremieux 1:30PM UNC316 CS “14”: Monitoring and Reporting Jared & Neil 5:00PM UNC315 CS “14”: Setup and Deployment Peter Schmatz Thursday 9:45AM UNC208 CS “14”: What's New in Devices Avi & Sachin
  22. 22. TechEd Online microsoft.com/communicationsserver Technical Library NextHop DrRez on Twitter Communications Server Exchange Server Partner Link Customer Link Exchange 2010 SP1 Beta download
  23. 23. www.microsoft.com/teched www.microsoft.com/learning http://microsoft.com/technet http://microsoft.com/msdn
  24. 24. Sign up for Tech·Ed 2011 and save $500 starting June 8 – June 31st http://northamerica.msteched.com/registration You can also register at the North America 2011 kiosk located at registration Join us in Atlanta next year

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