Skype for Business DTMF tone not passing RRS feed

  • Question

  • Hi,

    We have an on premise Skype for Business server, we have one setup with older computers some have windows 7 some have vista and they are laptops.

    They have the lastest Skype for Business install and they can't seem to pass dtmf tone when calling a third party conference dial in and they don't hear the DTMF tone when they call a cellphone. Sometimes it works sometimes it doesn't I know of the issue with the inability to pass dtmf while in a conference call but this is during a standard call and other users on the server aren't having these issues


    Thursday, January 5, 2017 11:00 PM

All replies

  • which kind of Gateway you are using with skype?
    Friday, January 6, 2017 6:27 AM
  • Hi Smbls,

    Welcome to our forum.

    Did this issue occur when you dial in an internal conference?
    Did this issue occur when you dial in a federation meeting?

    To this intermittent issue, we suggest you renew SFB certificate wizard on FE, Mediation server and Edge as the following snapshot:

    When it failed, please check if there are any errors in application log on mediation server and post them for our troubleshooting.

    If there are any questions or issues, please be free to let me know.           

    Best Regards,
    Jim Xu
    TechNet Community Support

    Please remember to mark the replies as answers if they helped.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    • Proposed as answer by jim-xu Tuesday, January 17, 2017 6:23 AM
    Friday, January 6, 2017 10:24 AM
  • We have starting getting this same issue on clients following the install of KB3128049 released a couple of days ago



    Uninstall it and the dialpad displays and DTMF tones work

    16.0.4456.1003 (32) works fine and dialpad displays
    16.0.4483.1000 (32) dialpad vanishes when call connects and DTMF does not work

    We are running Skype for Business server v6.0.9319.259 and our PSTN calls are going via Audiocodes gateways.

    Friday, January 6, 2017 2:08 PM