4. MCS: Enterprise Communications CoE Architect

13. “Optimizing Lync 2010 Enterprise Voice Performance”: http://technet.microsoft.com/en-us/library/jj650858.aspx

20. Classroom (video) Admin (data) Admin (voice) Faculty (data) Faculty (voice) Layer 3 link Classroom (video) Main campus – QoS domain #1Remote site – QoS domain #2 QoS Policy (5 classes) 802.1p value DSCP queue Voice: 6 46 7 Video: 5 36 6 Signaling: 4 26 5 Default: 0 0 3 Scavenger: 1 14 1 QoS Policy (3 classes) 802.1p value DSCP queue Voice: 6 46 4 Video: 5/4 36/26 3 Default: 0/1 0/14 1

33. CodecRTAudio - 8KhzRTAudio - 16 KhzSirenG.711G.722G.722 Stereo Typical Bandwidth – No FEC 30.9 kbps39.8 kbps25.5 kbps64.8 kbps46.1 kbps73.1 kbps Upper Limit – No FEC 44.8 kbps62 kbps52.6 kbps97 kbps100.6 kbps159.6 kbps Upper Limit - FEC 56.6 kbps91 kbps68.6 kbps161 kbps164.6 kbps223.6 kbps

34. Packetization time is duration of audio sent in each packet. Increasing packetization increase delay, decreases network bandwidth 20 ms of audio (72.5 Bytes ) Packet overhead (70 Bytes) 20ms RTAudio WB 20 ms of audio (72.5 Bytes ) Packet overhead (70 Bytes) 40ms RTAudio WB 20 ms of audio (72.5 Bytes ) 20 ms of audio (72.5 Bytes ) Packet overhead (70 Bytes) 60ms RTAudio WB 20 ms of audio (72.5 Bytes ) 20 ms of audio (72.5 Bytes ) 57Kbps 43 Kbps +20 ms delay 38.3 Kbps +40 ms delay Packet overhead numbers includes: IP, UDP, RTP, SRTP headers/footers

39. Lync 2013 – Video peer-to-peer Lync 2013 Front End Server Central Site Branch Site 2 Branch Site 1

40. Lync 2013 – Video peer-to-peer Lync 2013 Front End Server Branch Site 2 Branch Site 1 Central Site

41. Lync 2013 – Window size impact on video

42. Lync 2013 – Network impact on video Video resolution decreased

43. Lync 2013 – Video conferencing Branch Site 3 Branch Site 2 Branch Site 1 Lync 2013 Front End Server with AVMCU Central Site

44. Lync 2013 – Video conferencing Branch Site 3 Branch Site 2 Branch Site 1 Lync 2013 Front End Server with AVMCU Central Site

45. Lync 2013 – Video conferencing Branch Site 3 Branch Site 2 Branch Site 1 Lync 2013 Front End Server with AVMCU Central Site

46. Lync 2013 – Video conferencing Branch Site 3 Branch Site 2 Branch Site 1 Lync 2013 Front End Server with AVMCU Central Site

47. Lync 2013 – Video conferencing Branch Site 3 Branch Site 2 Branch Site 1 Lync 2013 Front End Server with AVMCU 15 fps Central Site

48. Lync 2013 – Video conferencing Branch Site 3 Branch Site 2 Branch Site 1 Lync 2013 Front End Server with AVMCU Central Site 15 fps

49. Lync 2013 – Data sharing impact on video

50. Lync 2013 – Multi-screen impact on video

52. Model is based on data from Lync 2013 Preview deployments at Microsoft and TAP customers Video usage (not BW!) doubled compared to Lync 2010 P2P video calls: Heavily depends on user behavior Plenty of resolutions possible from 180p to 1080p ~75% of users with default video resolution of 424x240 ~25% increase video window to obtain 640x360 or HD video

53. MultiView conference video calls: Depends even more on user behavior Typical screen real estate allows for tiles with resolution of 424x240 (clipped to square) Data sharing reduces screen real estate for video in most conferences Not all users actually use video Receive: average of 2.5 video streams Send: average of 1.6 video streams

54. For the main video the typical and maximum stream bandwidth is the aggregated bandwidth over all received video streams and over all send video streams respectively. Even with multiple video streams the typical video bandwidth is smaller than in the peer-to-peer scenario because many video conferences are using content sharing that leads to much smaller video windows and thus smaller video resolutions. http://technet.microsoft.com/en-us/library/jj688118.aspx

55. Typical - average consumption of bandwidth, seen in rather large population of Lync users, who also behave more-less “normally” Maximum – maximum consumption of bandwidth, dealing with rather small population of users, or if you would suspect that users you are dealing with have quite unusual speech patterns http://technet.microsoft.com/en-us/library/jj688118.aspx

56. It’s ”just” the tool for modeling the bandwidth consumption, so you must use your head as well Information on Lync design is needed or some assumptions must be made Consult the User Guide, ask UCBWCalc@microsoft.com when unsure, and send us feedback !UCBWCalc@microsoft.com Lync 2010 and 2013 Bandwidth Calculator http://www.microsoft.com/en-us/download/details.aspx?id=19011

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