Intermitant 1 way Audio RRS feed

  • Question


    Have an issue where on some calls we get 1 way audio, this can be external, or internal.


    the call connects you talk for a while then all of a sudden 1 of you cant hear the other, or in some cases no audio at all itll suddenly stop although the calls still connected.


    anybody any ideas ?


    Thanks in Advance

    Thursday, February 7, 2008 10:59 AM

All replies

  • Hi,

    That's an interesting problem because it will happen internally or externally. If it were only external, I'd say that your mediation server was the issue & to make sure that you aren't binding 2 IP addresses to the same NIC.


    But since it also happens internally, you may want to take a look at your LAN / internal network or communicator itself. Because internal calls between communicator clients are "peer-to-peer" the voice traffic goes straight from one client to another without passing through an OCS server. So either communicator is malfunctioning & dropping voice packets or there's an issue with your network.


    The best way to tell is:

    •  make sure communicator is updated
    •  install WireShark (or netmon or any other packet sniffer) on one of your machines w/ communicator and see if during one of the 1-way audio calls you are getting any UDP packets from the remote end
    • make sure that the any possible paths between communicator clients don't involve any firewalls that are potentially blocking UDP/STUN.
    • If you are making calls from outside the firewall, (users logged in from home/hotels/etc.) make sure that you have a public IP address assigned to your A/V Edge server


    Hope that helps.




    Wednesday, February 13, 2008 1:06 PM
  • The problem was to do with the duel NIC config on a mediation server. We have since moved to a Hybrid Gateway with a single NIC and this has been working great. We've not had any recurrences yet, so looks promising.
    Thursday, February 21, 2008 3:41 PM