MX64 and MS PSTN Teams Voice Service 1 way Audio

[CharlieCrackle]

Any one having issues with one way audio using MS teams to PSTN network with MX64 ?

I have a number of customers using TEAMS voice to the PSTN network.

If you dont make any calls for a while when you make the call you get 1 way audio  Called party can not hear the calling party.

You hang up and then call again and it works.  and keeps working till you  don't make calls for a while (say 30 minutes)

customer are now ringing there mobiles first before ringing person so they know it will work.

if I remove the meraki and put in a cisco router running NAT  it works fine..

It is like something gets setup on first calls and then stays there and then times out after no use...

tried a sip phone via MX and it works fine.   just seems to effect MS Teams

Any one else seeing this ??

[PhilipDAth]

We use Microsoft teams with a SIP provider for PSTN access for both ourselves and our customers.

We have zero issues.  It's a dream.

[CharlieCrackle · Accepted solution]

Just updating the thread

After opening a case with Microsoft the issue was at their end

Charles

[CraigJohnson]

Hi Charlie, we are having the exact same issue with one of our customers using MS Teams PSTN calling with MX250 and MS120 devices. We had opened a case with Microsoft and they pointed the finger back to the network. Can you please provide some details on the case you opened with Microsoft so we can go back to them to assist with troubleshooting the issue. 

Thanks

Craig

[RJ2]

Hey Craig,

Looks like we're experiencing the same thing as yourself and Charlie. Just wondering, if you ever figured out what the issue was?

Thanks

[CharlieCrackle]

The issue was at Microsoft End.  Needed to open a support case and get them to trace the calls.