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Most calls with Teams Direct Routing become one way audio

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jguel
New Contributor

Have set up Direct Routing with an Audiocodes SBC and am testing features with my account in Teams only mode.

 

I can make and receive calls just fine but it seems on most calls after about a minute or so the audio becomes one way - initially the call would just drop and I saw in the syslog the AC was showing an rtp broken connection error so I set broken connection mode to ignore but now the audio just becomes one way where I can hear the remote person but they can't hear me. Audiocodes syslog isn't helping much and just shows an rtp broken connection error.

 

Anyone else see this or have any ideas? I would suspect it's the firewall except for the fact that in some of my testing the calls are fine and don't become one way.

2 Replies
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Hi @jguel, where is your SBC deployed? Is it nat'ted? In case there is NAT used: did you configure NAT rules on the SBC, too?

There is a good blog post regarding SBC Teams Direct Routing and NAT here: https://www.ucguys.com/2018/08/one-way-audio-with-microsoft-direct-routing-with-audiocodes-mediant-s...

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It is NAT'd and I do have NAT rules set up. I don't think that's the problem because as I said the audio is two way in the beginning of the call and only becomes one way after a minute or two. Plus it's not every call but it is most calls.
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