Calls

WFCC has one-to-one and group calls, voice-only or with video, and screen sharing — in the same app as chat and tasks.

What calls do

• Voice uses the Opus codec. On a phone, a voice-only call plays through the earpiece.
• Video and screen sharing use HEVC, encoded on the device’s own graphics chip where it can.
• Echo cancellation and noise suppression are built in.
• Weak networks. The connection adapts to the network, and on a weak link the picture resolution goes down to keep the call going.
• Call waiting is supported, and Bluetooth audio is offered when a headset is connected.

During a call

1. Start the call from a chat with the call or video button.
2. Answer an incoming call with Accept. The call timer starts when the other side answers, and a short vibration tells you the call has connected.
3. Use the controls to mute the microphone, turn the Camera on or off, or share your screen.
4. Check the connection. Tap the quality arrows to see live link statistics, including the measured send bitrate.

Calls need a connection; they do not work offline.

Device setup

• Calls and video on Windows
• Calls on Android