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unable to make pc to pc call with communicator

Question
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On one specific machine, I have the problem of making phone calls between 2 communicator clients. Calling the other end looks OK, but at the moment the other end accepts the call, the connection is dropped with:
An error occurred during the call.
More details (ID:87)in the tracing log, I get:
12/05/2008|09:03:17.871 5EC:14D0 ERROR :: failed to get the default address 80ee0058
12/05/2008|09:03:17.871 5EC:14D0 ERROR :: failed to get the default address 80ee0058
12/05/2008|09:03:17.871 5EC:14D0 ERROR :: failed to get the default address 80ee0058
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCStream::AttachSecurityContext
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT failed: 80070057 = hr. failed to add the srtp key
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCSendStream::AttachEncryptionInfo
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT failed: 80070057 = hr. attach sec context failed
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCChannel::AttachEncryptionInfo
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT API failed: 80070057 = hr. failed to attach encryption info
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCStream::AttachSecurityContext
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT failed: 80070057 = hr. failed to add the srtp key
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCReceiveStream::AttachEncryptionInfo
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT failed: 80070057 = hr. attach sec context failed
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCChannel::AttachEncryptionInfo
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT API failed: 80070057 = hr. failed to attach encryption info
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCMediaParticipant::UpdateNegotiatedEncryption
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT failed: 80070057 = hr. failed to attach
12/05/2008|09:03:17.933 5EC:14D0 INFO :: Function: CRTCMediaParticipant::UpdateMediaChannel
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: HRESULT failed: 80070057 = hr. failed to compute the negotiated encryption
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: CRTCMediaParticipant::UpdateAllMediaChannels[03913868] get sdp media num. 80070057
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: CRTCMediaParticipant:etSDPSession[03913868] failed to udate the sdpsession. 80070057
12/05/2008|09:03:17.933 5EC:14D0 ERROR :: RTP_CALL:etSDPBlobInAnswer SetSDPSession failed 80070057
I tried reinstalling, removing, clean install.
It looks like a dependency like stream, security or whatever dependent component on the machine is causing the issue.
Anyone seen this before or knows more about dependencies I can focus on troubleshooting.
Friday, December 5, 2008 8:23 AM
All replies
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Please disable the IPv6 stack as you are using an IPv6 addressFriday, December 5, 2008 8:13 PM
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thanks for the response,
I am using IPv4, IPv6 protocol stack is not even loaded on my system.
any other hints?
Monday, December 8, 2008 8:37 AM -
Can you determine if this is occurring when calling all clients from the affected machine or just between these two in particular?Monday, December 8, 2008 11:18 PM
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It's one specific machine that is not capable of making any calls, dial and answer. All other machines
are able to make phone calls.
I reinstalled the communicator multiple times, downloaded the latest patches but nothing helps. It must be a dependency outside the installation scope of communicator.
The trace shows rtp binding failures on a stream. what stream is used and where does it come from, so I can reinstall that part I think.
Tuesday, December 9, 2008 8:28 AM -
Did you try multiple users on that machine?Tuesday, December 9, 2008 9:56 PM
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Hi,
Is the OS different on this machine ? different SP ?
Tuesday, December 9, 2008 10:46 PM