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Audio Stream Callee to caller max 30% packet loss rate

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The call quality is poor. the MOS marks to 2.0

Media bypass is enable.

How to fix the packet loss issue?

Thank you.
- Edited by JohnHK215 Wednesday, April 15, 2015 1:31 PM mediapass
Wednesday, April 15, 2015 1:29 PM

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Have you tried running the Pre Call Diagnostic Tool? https://technet.microsoft.com/en-us/library/dn451255.aspx

Also look at this older thread: https://social.technet.microsoft.com/Forums/lync/en-US/f3856a95-dc94-494a-8006-65d1a92b836d/lync-monitoring-role-shows-packet-loss?forum=ocsvoice

Please mark posts as answers/helpful if it answers your question.
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Lync Validator - Used to assist in the validation and documentation of Lync Server 2013.
- Marked as answer by JohnHK215 Monday, April 27, 2015 6:31 AM
Wednesday, April 15, 2015 1:57 PM

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Have you tried running the Pre Call Diagnostic Tool? https://technet.microsoft.com/en-us/library/dn451255.aspx

Also look at this older thread: https://social.technet.microsoft.com/Forums/lync/en-US/f3856a95-dc94-494a-8006-65d1a92b836d/lync-monitoring-role-shows-packet-loss?forum=ocsvoice

Please mark posts as answers/helpful if it answers your question.
Blog
Lync Validator - Used to assist in the validation and documentation of Lync Server 2013.
- Marked as answer by JohnHK215 Monday, April 27, 2015 6:31 AM
Wednesday, April 15, 2015 1:57 PM
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Pre Call Diagnostic Tool I try to use before but have error, but I just try it can run now.

Let me test it tomorrow.

Wednesday, April 15, 2015 2:13 PM
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I got this error when run the tools on internal network. Any advise?

Thursday, April 16, 2015 2:27 AM
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Hi,

Please try to use the Lync 2013 PreCall Diagnostics Tool in Windows Store.

For the issue about high packet loss rate, please double check if the network bandwidth and check if there is any anti-virus software or any port issue for the packet loss rate issue.

Best Regards,
Eason Huang

Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.
Eason Huang
TechNet Community Support

Friday, April 17, 2015 7:27 AM