Enable Media Bypass

Media Bypass must be enabled at a global level before clients attempt to use the bypass features. When enabling Media Bypass in the Lync Server infrastructure, an administrator has two options:

• Always bypass—This choice instructs clients to always bypass the Mediation Server role. This option works only if a trunk configuration also has the enable media bypass option selected. All Lync clients must have good network connectivity to the other end of every single SIP trunk for this option to be effective. This option may make sense in very small deployments.

• Use sites and region configuration—This choice is a better option when Lync endpoints might not have good network connectivity to each SIP trunk and enables the network region and site configuration to limit when Media Bypass is actually used. Enable bypass for non-mapped sites can be selected only if Use sites and region configuration is selected first. This allows for sites and subnets not explicitly configured to use Media Bypass.

To select a choice in enabling Media Bypass, use the following steps:

1. Open the Lync Server 2010 Control Panel.

2. Click Network Configuration.

3. Click Global.

4. Highlight the global policy, click Edit, and then select Show Details.

5. Check the box Enable media bypass.

6. Select either Always bypass or Use sites and region configuration.

7. If selecting the Use sites and region configuration, optionally check the box Enable bypass for non-mapped sites.

8. Click Commit.