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naimeshmistry's avatar
naimeshmistry
Copper Contributor
Sep 02, 2020
Solved

PSTN Call Drops if you put the call on hold then resume and hit transfer

Scenario PSTN Call received on Teams Client, placed call on-hold , resume, click transfer and the call drops.   No changes anywhere, was working until a client drew my attention. Is anyone experie...
microsoft teams
  • Shane Toal's avatar
    Shane Toal
    May 17, 2021

    Hi jxace 

    Our root cause was someone had defined an extra sip port on the hosted SBC trunk in our Direct routing setup

     

    The hosted SBCs were load balancing between 2. Unfortunately though, the fqdn in the contact header means this caused problems with TEAMS.

    Our SBC provider disabled the 'bad' port - then all calls were fine in the respect of any ACKs or re-invites etc between TEAMS and the SBC.

     

    Not sure if this helps but good luck

RealTime_M365's avatar
RealTime_M365
MVP
Sep 08, 2020

Hi naimeshmistry 

 

Can you please see if disabling the New Meeting Experience you are able to resolve the issue?

 

A drop-down menu appears. Select Settings. The Settings window appears with the General section selected. Click or tap "Turn on new meeting experience (New meetings and calls will open in separate windows.

 

Uncheck the New Meeting Experience and check if we are able to use the services smoothly.

 

With Regards,

Satish U

  • naimeshmistry's avatar
    naimeshmistry
    Copper Contributor
    Sep 09, 2020

    RealTime_M365 

     

    Tried disabling New Meeting and experience and unfortunately it hasn't resolved the issue.

    I disabled the "New Meeting experience" then did a restart of Teams Desktop client. 

     

    When I hit the transfer MS seems to think I have hanged up as that what I see "Normal Call Clearing"

     

    Thanks 

    Naimesh

    • naimeshmistry's avatar
      naimeshmistry
      Copper Contributor
      Sep 09, 2020

      RealTime_M365

       

      Interestingly when I accept the incoming PSTN call on CCX500, I am able to put it on hold > resume > then hit transfer and it works.

       

      I think it seems to be the Teams Desktop client.

       

      Note ( I haven't tried Teams Web Client)

       

      Kind Regards

      Naimesh Mistry

      • RealTime_M365's avatar
        RealTime_M365
        MVP
        Sep 11, 2020

        Hi naimeshmistry 

         

        This seems to be the issue with the Latest Teams Client which is causing the issue. I have mine customer also facing the same issue. We have reported the same to Microsoft Engineering on the same.

        Since we are on the latest version of the Teams Client we don't see any issues on the same. 

         

        With Regard,

        Satish U

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