14 August, 2012

Lync 2010 Trunk Media Bypass

Lync 2010 Trunk Media Bypass

Hello Guys,

Almost everyone heard about Trunk Media Bypass however you how it work, how to configure the same, today I will show you same.

Trunk Media Bypass is the media from the Lync client destined for PSTN/SIP-trunk or vice-versa always traversed through the Mediation Server.

With Lync 2010, a Mediation Server can now have a one to many relationships with media gateways, allowing a single Mediation Server to control multiple PSTN Gateways, IP-PBXs or E-SBCs. This flexible relationship is made possible via a powerful new Media Bypass feature in Lync 2010.

How to Configure 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. Open a browser window, and enter the Admin URL to open the Lync Control Panel.
2. In the left navigation bar, click Voice Routing and click Trunk Configuration.
3. On the Trunk Configuration page, use one of the following methods to configure a trunk:
·        Double-click an existing trunk (for example, the Global trunk) to display the Edit Trunk Configuration dialog box.
·        Click New, and select a scope for the new trunk:
1. Site trunk: Choose the site for this trunk configuration from the Select a Site dialog box, and then click OK. If a trunk has already been created for a site, the site does not appear in the Select a Site dialog box.
2. 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. If a trunk has already been created for a service, the service does not appear in the Select a Service dialog box.
4. Give 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.
5. Select one of the following Encryption support level options:
·        Required: To help protect traffic between the Mediation Server and the gateway or PBX, secure real-time transport protocol (SRTP) encryption must be used.
·        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.
6. If you want media to bypass the Mediation Server for processing by the trunk peer, select the Enable media bypass check box.
7. 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). Deselect this check box if the trunk does not have a well-known media termination point.
8. If the trunk peer supports receiving SIP REFER requests from the Mediation Server, select the Enable refer support check box. Deselect the check box if the trunk peer does not support receiving SIP REFER requests from the Mediation Server.
9. (Optional) Associate and configure 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.
10. Make sure the trunk’s translation rules are arranged in the correct order. Highlight the rule name and then click the up or down arrow to change a rule’s position in the list.
11. Click OK when you are finished configuring the trunk.
12. On the Trunk Configuration page, click Commit, and then click Commit all.

Thank you.

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Your feedback is always appreciated. I will try to reply to your queries as soon as possible- Amol Ghuge