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

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Design Considerations
Planning Audio Quality
See “Configure Media Bypass (Recommended)” on page 3-7 of Chapter 3:
“Ready the Data Center for an SBM Deployment” for general instructions on
enabling the feature. “Configure Media Bypass” on page 4-49 of Chapter 4:
“Example Solutions” provides step-by-step instructions for an example Media
Bypass configuration.
Planning Audio Quality
In a Unified Communications and Collaboration (UC&C) solution, a call’s
audio quality depends on many factors in its journey through the LAN and the
WAN or PSTN. This section provides guidelines for optimizing audio quality
in the parts of the journey over which you have control.
Ensure QoS for VoIP calls within the Network
Infrastructure
All calls to and from branch Lync users pass through the branch LAN, as do
calls that are routed out through the SBM’s Media Gateway.
Figure 2-3. Local Peer-to-Peer Calls