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A PSTN call to a Response Group number disconnects in an Office Communications Server 2007 R2 environment

SYMPTOMS
When you make a Public Switched Telephone Network (PSTN) call to a Response Group number that is hosted in a Microsoft Office Communications Server 2007 R2 environment, the call disconnects. In addition, a message that resembles the following is logged on the Office Communications Server 2007 R2, Front-end server:

TL_INFO(TF_PROTOCOL) [1]4AE8.5160::date&time.470.0011e7d0 (SIPStack,SIPAdminLog::TraceProtocolRecord:SIPAdminLog.cpp(122))$$begin_record
Instance-Id: 00007F3F
Direction: outgoing;source="local"
Peer: peername
Message-Type: response
Start-Line: SIP/2.0 400 Bad request
From: <sip:####;phone-context=phonecontext;user=phone>;epid=epid;tag=tag
To: <sip:####;phone-context=phonecontext;user=phone>;epid=epid;tag=tag
CSeq: 2 SUBSCRIBE
Call-ID: CallID
Via: SIP/2.0/TLS IPaddress:portnumber;branch=z9hG4bK68bb2e53;ms-received-port=portnumber;ms-received-cid=idnumber
ms-diagnostics: 4017;reason="AOR in GRUU is not owned by the message source";source="Sourcename"
Content-Length: 0
Message-Body: –
$$end_record

TL_INFO(TF_PROTOCOL) [2]4514.484C::date&time.470.0011e846 (S4,SipMessage.DataLoggingHelper:sipmessage.cs(581))
<<<<<<<<<<<<Incoming SipMessage c=[<SipTlsConnection_1AB5AF0>], IPaddress:portnumber<-IPaddress:portnumber
SIP/2.0 400 Bad request
FROM: <sip:####;phone-context=phonecontext;user=phone>;epid=epid;tag=tag
TO: <sip:####;phone-context=phonecontext;user=phone>;epid=epid;tag=tag
CSEQ: 2 SUBSCRIBE
CALL-ID: CallID
VIA: SIP/2.0/TLS IPaddress:port;branch=z9hG4bK68bb2e53;ms-received-port=63680;ms-received-cid=25100
CONTENT-LENGTH: 0
ms-diagnostics: 4017;reason="AOR in GRUU is not owned by the message source";source="Sourcename"
------------EndOfIncoming SipMessage
CAUSE
This issue occurs because of an SignalingSession.BeginParticipate exception. This exception causes Mediation Server to send a BYE request to the gateway, which disconnects the call.

RESOLUTION
To fix this problem, install the following cumulative update:

982170 Description of the cumulative update for Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: July 2010
STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
For more information about the latest updates for Communications Server 2007 R2, click the following article number to view the article in the Microsoft Knowledge Base:
968802 Updates for Communications Server 2007 R2

Properties

Article ID: 2251690 - Last Review: 07/22/2010 18:55:00 - Revision: 1.0

Microsoft Office Communications Server 2007 R2 Enterprise Edition, Microsoft Office Communications Server 2007 R2 Standard Edition

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