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Whether the Media flow can be bypass between Lync and Skype?

Answers

  • The media flow between Lync and Skype is achieved using media transcoding services in Microsoft's cloud. Media cannot be routed point to point between Lync clients/servers and Skype endpoints.

    Justin Morris | Lync MVP | Senior Consultant | Modality Systems
    Lync Blog - www.justin-morris.net
    Twitter: @justimorris
    If this post has been useful please click the green arrow to the left or click "Propose as answer"

    • Marked as answer by Kent-Huang Monday, August 26, 2013 6:45 AM
    Monday, August 05, 2013 10:16 AM
  • Hi,

    Please double check the firewall rules going from the Edge servers to the Internet. Here is a similar case for your reference:

    http://social.technet.microsoft.com/Forums/lync/en-US/88c8c94c-b968-4164-9537-d0b955fb86c9/lync-skype-audio-calls-not-working

    Determine External A/V Firewall and Port Requirements

    http://technet.microsoft.com/en-us/library/gg425882.aspx

    If you MSN provider was previously created, please remove the MSN provider and create the Skype one and add the Skype contact to Lync using method from: http://social.technet.microsoft.com/Forums/en-US/ocsinterop/thread/5643b216-f194-4b10-9e39-d20b48c7f328

    If the issue persists, activate the trace on the Lync client and check the trace with the snooper.exe from the debugging tools, to see why the media stream not work.


    Kent Huang
    TechNet Community Support

    • Marked as answer by Kent-Huang Monday, August 26, 2013 6:46 AM
    Wednesday, August 21, 2013 6:02 AM

All replies

  • Hi - you're taking about media bypass (which is not used on Lync to Skype calls) or whether media can flow between Lync to Sype calls? (currently IM/presence and p2p audio is supported, the rest on roadmap).

    If that doesn't answer your question then please expand on it.

    Monday, August 05, 2013 7:53 AM
  • The media flow between Lync and Skype is achieved using media transcoding services in Microsoft's cloud. Media cannot be routed point to point between Lync clients/servers and Skype endpoints.

    Justin Morris | Lync MVP | Senior Consultant | Modality Systems
    Lync Blog - www.justin-morris.net
    Twitter: @justimorris
    If this post has been useful please click the green arrow to the left or click "Propose as answer"

    • Marked as answer by Kent-Huang Monday, August 26, 2013 6:45 AM
    Monday, August 05, 2013 10:16 AM
  • That's right, i phrased it incorrectly; I mean audio calls are 1-to-1 Lync/Skype and multipoint conferences are not supported, and not that audio stream would flow p2p. thanks for pointing out.
    Monday, August 05, 2013 10:28 AM
  • But we often have call failure, and also the interruption will happen automatically when call is in progress for several minutes, why this is caused?
    Tuesday, August 06, 2013 12:12 AM
  • Hi,

    Please choose Lync call when making call to Skype contact.

    Please install the latest update for Lync Server.

    Please check if your gateway support SIP REFER. If not, please uncheck this option.


    Kent Huang
    TechNet Community Support

    Tuesday, August 06, 2013 1:29 AM
  • Yes, i choosed Lync call to Skype.

    Whether the latest update can fix it?

    if Lync call to Skpye, whether the call establish is relative with Gateway?

    Tuesday, August 06, 2013 3:30 AM
  • A call to a Skype user doesn't communicate with your PSTN gateway, all the traffic is via the Edge Server.

    If your calls to Skype are dropping/failing, you should take a look at your firewall that's providing internet connectivity to the Edge Server. Check that all the necessary ports are open.


    Justin Morris | Lync MVP | Senior Consultant | Modality Systems
    Lync Blog - www.justin-morris.net
    Twitter: @justimorris
    If this post has been useful please click the green arrow to the left or click "Propose as answer"

    Tuesday, August 06, 2013 7:52 AM
  • I checked the port should be released on our Firewall. Internet connectivity should be fine; but the call seems to be unstable, and their status show offline each other under Contacts tab of Lync and Skype client software even if they is on-line. 

    Wednesday, August 07, 2013 1:03 AM
  • Hi,

    Please double check the firewall rules going from the Edge servers to the Internet. Here is a similar case for your reference:

    http://social.technet.microsoft.com/Forums/lync/en-US/88c8c94c-b968-4164-9537-d0b955fb86c9/lync-skype-audio-calls-not-working

    Determine External A/V Firewall and Port Requirements

    http://technet.microsoft.com/en-us/library/gg425882.aspx

    If you MSN provider was previously created, please remove the MSN provider and create the Skype one and add the Skype contact to Lync using method from: http://social.technet.microsoft.com/Forums/en-US/ocsinterop/thread/5643b216-f194-4b10-9e39-d20b48c7f328

    If the issue persists, activate the trace on the Lync client and check the trace with the snooper.exe from the debugging tools, to see why the media stream not work.


    Kent Huang
    TechNet Community Support

    • Marked as answer by Kent-Huang Monday, August 26, 2013 6:46 AM
    Wednesday, August 21, 2013 6:02 AM