HP Survivable Branch Communication zl Module powered by Microsoft Lync Planning and Design Guide 2011-02

2-17
Design Considerations
Planning Call Capacity
Table 2-15. Bandwidth Requirements for Audio, Video, and Web Conferencing
Table 2-16. Estimate Additional WAN Bandwidth Requirements
Media Bypass
Your SBM solution’s call capacity depends on whether it uses Media Bypass.
It is recommended that you use Media Bypass for PSTN calls routed out the
SBM. If you do not, you might not be able to achieve the maximum 120
simultaneous PSTN calls.
Feature Typical Bandwidth
per Session
Maximum
Bandwidth per
Session without
FEC
Maximum
Bandwidth per
Session with FEC
RTAudio (8 kHz) 25.9 Kbps 39.8 Kbps 51.6 Kbps
RTAudio (16 kHz) 34.8 Kbps 57 Kbps 86 Kbps
RT Video
CIF
203 Kbps 250 Kbps —
RTVideo
VGA
492 Kbps 600 Kbps —
Video
High definition
1.2 Mbps 1.5 Mbps —
RoundTable
280 Kbps 350 Kbps —
Web conferencing
(PSOM)
200 Kbps 500 Kbps —
File transfer
200 Kbps 200 Kbps —
Application sharing
1 Mbps 3.5 Mbps —
Call Type My.Estimate for
Required Bandwidth
My Number of
Concurrent Uses
Total Estimated
Bandwidth
Audio conference X = ____ A = _____ A*X = ____
Video conference
Y = ____ B = _____ B*Y = ____
Web conferencing
Z = ____ C = _____ C*Z = ____
File transfer
W = ____ D = _____ D*W = ____
Application
sharing
V = ____ E = _____ E*V = ____