Consider the following scenario:
- You have a Microsoft Lync Server 2010 environment that has more than one Mediation server and a Public Switched Telephone Network (PSTN) gateway deployed. The Mediation servers are configured to use dual Network Adapters.
- A Mediation server cannot connect to the PSTN gateway because of a network issue that is specific to the Mediation server.
- You call a PSTN number by using Lync 2010.
- The call is routed to the Mediation server.
SIP/2.0 504 Cannot connect to gateway. Socket error: TimedOut
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2539642 - Last Review: Apr 20, 2011 - Revision: 1