Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. Mediation Server does not associate the correct bypass ID in a Lync Server 2010 environment

Mediation Server does not associate the correct bypass ID in a Lync Server 2010 environment

View products that this article applies to.

Symptoms

Consider the following scenario:
  • You have a Microsoft Lync Server 2010 environment that contains a Public Switched Telephone Network (PSTN) gateway, and a virtual PSTN gateway that has the same IP address as the PSTN Gateway. 
  • The virtual PSTN gateway is associated to a Media Termination Point (MTP) resource that has a different IP address from the PSTN gateway signaling IP address. Additionally, the MTP resource is located in a different site. 
  • You enable media bypass on the trunk connection for all the sites in the Lync Server 2010 environment.
  • A PSTN user makes a call that uses MTP in a remote site to a Lync 2010 user.

    Note The call is routed to the Lync 2010 user through the virtual PSTN gateway.
In this scenario, Mediation Server may sends the bypass ID associated to the PSTN gateway instead of the virtual PSTN gateway.

↑ Back to the top

Cause

This issue occurs because the INVITE request arrives from the same signaling IP address. Therefore Mediation Server cannot determine reliably whether the call comes from the PSTN gateway, or the virtual PSTN gateway.

↑ Back to the top

Resolution

To resolve this issue, install the following cumulative update:
2502810 Description of the cumulative update for Lync Server 2010, Mediation Server: April 2011

↑ Back to the top

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

↑ Back to the top

More Information

For more information about how Media Bypase works, visit the following Microsoft Technet website:
How Media Bypass Works

↑ Back to the top

Keywords: kbqfe, kbfix, kbhotfixrollup, kbexpertiseinter, kbsurveynew, kb

↑ Back to the top

Article Info
Article ID : 2517687
Revision : 1
Created on : 1/7/2017
Published on : 4/20/2011
Exists online : False
Views : 406