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Lync client receive poor quality signal for network issue RRS feed

  • Question

  • Network connectivity causing audio delays, any practice for Cisco switch? QOS?

    around 400 peoples using lync client soft phone or Hard phone both report the audio delays issues. almost is using soft client.


    Workstation and Lync server done the QOS already. Switch was done QOS same but look not working.

    Client still report audio delays issue.

    Any suggestions?

    Thursday, March 12, 2015 11:22 AM

Answers

  • It could be either or between your mediation and Cisco, I'd consider using wireshark to capture sone test calls at the mediation server to see if you can spot issues.

    Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer". SWC Unified Communications

    This forum post is based upon my personal experience and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

    • Proposed as answer by Eason Huang Tuesday, March 17, 2015 1:14 AM
    • Marked as answer by JohnHK215 Monday, April 27, 2015 6:33 AM
    Saturday, March 14, 2015 4:04 PM

All replies

  • The Monitoring Reports provide specific reports concerning call quality. For example the Media Quality Summary Report.

    You should check if the reports are showing "poor call quality calls" and you can trill into the report to find out why the call had poo quality (packet loss, jitter).


      
    Thursday, March 12, 2015 12:38 PM
  • If there's a delay, meaning you say something and it's a while before it's heard, it may not necessarily be a QoS issue.  Check out the monitoring reports like emu78 mentioned, but look at latency as well.  Are there delays between two Lync people using voice in the same subnet?

    Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer". SWC Unified Communications

    This forum post is based upon my personal experience and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

    Thursday, March 12, 2015 5:02 PM
  • Are there delays between two Lync people using voice in the same subnet?

    No. They using same subnet.

    If there's a delay, meaning you say something and it's a while before it's heard.

    It is delay between Inbound and outbound call, local peer to peer call no problem, user can't hear some words, some words loss between the call.

    Friday, March 13, 2015 2:08 AM
  • Hi,

    If the delay happen between internal and external Lync call, it can be the issue of Edge Server. QoS is useless for Internet traffic. You can check the Monitoring Report to find the delay information.

    Here is a similar case may help you:

    https://social.technet.microsoft.com/Forums/lync/en-US/0c22ae53-7fb7-4e9c-bed9-858243373fed/call-delay

    If the issue happen for PSTN calls, please double check the configuration of the Media Gateway.

    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, March 13, 2015 7:21 AM
  • But we don't have deploy the Edge server, no mobility. 

    If the signal show poor it mean the Layer 2 switch network connection is poor or the connection from lync client to lync FrontEnd Server connection is poor?

    Thanks.

    Saturday, March 14, 2015 1:33 PM
  • It could be either or between your mediation and Cisco, I'd consider using wireshark to capture sone test calls at the mediation server to see if you can spot issues.

    Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer". SWC Unified Communications

    This forum post is based upon my personal experience and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

    • Proposed as answer by Eason Huang Tuesday, March 17, 2015 1:14 AM
    • Marked as answer by JohnHK215 Monday, April 27, 2015 6:33 AM
    Saturday, March 14, 2015 4:04 PM
  • finding media gateway vendor to check the issue, but they using same gateway with SBC routing to another PBX gateway. 

    Another PBX gateway no quality issue report, the gateway loading is low. T1 interface no error found.

    Sunday, March 29, 2015 2:31 AM
  • But it hard to analysis the information with Cisco wireshark.

    they still have quality issue and happen on random call, but if the call is add 3rd people it will hear obviously delay and loss on the call.


    • Edited by JohnHK215 Sunday, March 29, 2015 2:37 AM x
    Sunday, March 29, 2015 2:36 AM
  • Hi ,

    if it is a conference call , it will go to SBA to open a conference call instead of peer to peer call?

    Monday, April 13, 2015 12:22 PM