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Set Lync 2010 Media Bypass on a Truck

 

Follow these steps if you want to set a trunk with media bypass enabled. Although we strongly recommend that you enable media bypass, before you enable media bypass on a SIP trunk, confirm that your qualified SIP trunk provider supports media bypass and is able to accommodate the requirements for successfully enabling the scenario. Namely, the provider must have the IP addresses of servers in your organization’s internal network. If the provider cannot support this scenario, media bypass will not succeed. For details, see Media Bypass in the Planning documentation.

 

To set media bypass on a trunk:

  1. Log on to the computer as a member of the RTCUniversalServerAdmins group, or as a member of the CsVoiceAdministrator, CsServerAdministrator, or CsAdministrator role. For details, see Delegate Setup Permissions.
  2. Open a browser window, and then enter the Admin URL to open the Lync Server Control Panel. For details about the different methods you can use to start Lync Server Control Panel, see Open Lync Server Administrative Tools.
  3. In the left navigation bar, click Voice Routing and then click Trunk Configuration.
  4. On the Trunk Configuration page, use one of the following methods to set a trunk:
    • Double-click an existing trunk (for example, the Global trunk) to display the Edit Trunk Configuration dialog box.
    • Click New, and then select a scope for the new trunk:
    • Site trunk: Choose the site for this trunk configuration from the Select a Site dialog box, and then click OK. Note that if a trunk has already been created for a site, the site does not appear in the Select a Site dialog box.
    • Pool trunk: Choose the service for this trunk configuration (for example, a PSTN gateway at a specified site) from the Select a Service dialog box, and then click OK. Note that if a trunk has already been created for a service, the service does not appear in the Select a Service dialog box.
  5. Specify a value in the Maximum early dialogs supported box. This is the maximum number of forked responses a PSTN gateway, IP-PBX, or ITSP Session Border Controller can receive to an INVITE that it sent to the Mediation Server. The default value is 20.
  6. Select one of the following Encryption support level options:
    • Required: Secure real-time transport protocol (SRTP) encryption must be used to help protect traffic between the Mediation Server and the gateway or PBX.
    • Optional: SRTP encryption will be used if the service provider or equipment manufacturer supports it.
    • Not Supported: SRTP encryption is not supported by the service provider or equipment manufacturer and therefore will not be used.
  7. Select the Enable media bypass check box if you want media to bypass the Mediation Server for processing by the trunk peer.
  8. Select the Centralized media processing check box if there is a well-known media termination point (for example, a PSTN gateway where the media termination has the same IP as the signaling termination). Clear this check box if the trunk does not have a well-known media termination point.
  9. If the trunk peer supports receiving SIP REFER requests from the Mediation Server, select the Enable refer support check box. Clear the check box if the trunk peer does not support receiving SIP REFER requests from the Mediation Server.
  10. Associate and set translation rules for the trunk:
    • To choose one or more rules from a list of all translation rules available in your Enterprise Voice deployment, click Select. In Select Translation Rules, click the rules that you want to associate with the trunk and then click OK.
    • To define a new translation rule and associate it with the trunk, click New. ·To edit a translation rule that is already associated with the trunk, click the rule name and then click Show details. ·        To copy an existing translation rule to use as a starting point for defining a new rule, click the rule name and click Copy, and then click Paste.
    • To remove a translation rule from the trunk, highlight the rule name and click Remove.
  11. Ensure the trunk’s translation rules are arranged in the correct order. To change a rule’s position in the list, highlight the rule name and then click the up or down arrow.
  12. When you are finished configuring the trunk, click OK.
  13. On the Trunk Configuration page, click Commit, and then click Commit all.
  14. After you have setd the trunk, continue configuring media bypass by choosing between global media bypass options.