No audio or one-way audio

They can't hear you

• Check you're not muted in the app or on your headset.
• Check microphone permission: on a phone in its app settings; on macOS in System Settings > Privacy & Security > Microphone; on Windows in Settings > Privacy > Microphone; in a browser via the lock icon in the address bar.
• In Communicator Next, choose the right microphone in Settings > Audio.

You can't hear them

• Check the volume, and which output is selected (earpiece, speaker or headset).
• Disconnect and reconnect your Bluetooth headset.
• In Communicator Next, choose the right speaker in audio settings and run the test.

Audio works one way only

If audio only travels one way on every call, the network or firewall is usually blocking the return path. Try another network to confirm, then pass the details to your IT team or contact support.