You deploy the Response Group Service (RGS) in a Microsoft Office Communications Server 2007 R2 environment.
A user calls the RGS from a Private Branch Exchange (PBX) telephone.
The user ends the call before the ring back tone is played.
In this scenario, the call is routed unexpectedly to the RGS, and rings for 8 minutes unless you restart the RGS. Additionally, the following event is logged on the Communications Server 2007 R2 server:
Event ID: 31036 Task Category: OCS Response Group Service Level: Error Keywords: Classic User: N/A Computer: <Computer Name> Description: Workflow was terminated because an unhandled exception occurred during its execution.
This issue occurs because one of the following reasons:
The CallDisconnected event is not raised by the CommunicationsSequenceActivity class when the call flow enters the CommunicationsSequenceActivity class in the scenario that is described in the “Symptoms” section.
The CANCEL request may not contain an ms-application-aor header in the scenario that is described in the “Symptoms” section. The Unified Communications Managed API 2.0 Windows Workflow Activities does not handle this situation correctly.
To resolve this issue, install the following cumulative update:
2502324 Description of the cumulative update for Office Communications Server 2007 R2, Microsoft Unified Communications Managed API 2.0 Windows Workflow Activities Redist: March, 2011
For more information about the CommunicationsSequenceActivity class, visit the following Microsoft website: