Calling client library overview


Azure Communication Services is currently in public preview. This preview version is provided without a service-level agreement, and it's not recommended for production workloads. Certain features might not be supported or might have constrained capabilities. For more information, see Supplemental Terms of Use for Microsoft Azure Previews.

There are two separate families of Calling client libraries, for clients and services. Currently available client libraries are intended for end-user experiences: websites and native apps.

The Service client libraries are not yet available, and provide access to the raw voice and video data planes, suitable for integration with bots and other services.

Calling client library capabilities

The following list presents the set of features which are currently available in the Azure Communication Services Calling client libraries.

Group of features Capability JS Java (Android) Objective-C (iOS)
Core Capabilities Place a one-to-one call between two users ✔️ ✔️ ✔️
Place a group call with more than two users (up to 350 users) ✔️ ✔️ ✔️
Promote a one-to-one call with two users into a group call with more than two users ✔️ ✔️ ✔️
Join a group call after it has started ✔️ ✔️ ✔️
Invite another VoIP participant to join an ongoing group call ✔️ ✔️ ✔️
Turn your video on/off ✔️ ✔️ ✔️
Mute/Unmute mic ✔️ ✔️ ✔️
Switch between cameras ✔️ ✔️ ✔️
Local hold/un-hold ✔️ ✔️ ✔️
Active speaker ✔️ ✔️ ✔️
Choose speaker for calls ✔️ ✔️ ✔️
Choose microphone for calls ✔️ ✔️ ✔️
Show state of a participant
Idle, Early media, Connecting, Connected, On hold, In Lobby, Disconnected
✔️ ✔️ ✔️
Show state of a call
Early Media, Incoming, Connecting, Ringing, Connected, Hold, Disconnecting, Disconnected
✔️ ✔️ ✔️
Show if a participant is muted ✔️ ✔️ ✔️
Show the reason why a participant left a call ✔️ ✔️ ✔️
Screen sharing Share the entire screen from within the application ✔️
Share a specific application (from the list of running applications) ✔️
Share a web browser tab from the list of open tabs ✔️
Participant can view remote screen share ✔️ ✔️ ✔️
Roster List participants ✔️ ✔️ ✔️
Remove a participant ✔️ ✔️ ✔️
PSTN Place a one-to-one call with a PSTN participant ✔️ ✔️ ✔️
Place a group call with PSTN participants ✔️ ✔️ ✔️
Promote a one-to-one call with a PSTN participant into a group call ✔️ ✔️ ✔️
Dial-out from a group call as a PSTN participant ✔️ ✔️ ✔️
General Test your mic, speaker, and camera with an audio testing service (available by calling 8:echo123) ✔️ ✔️ ✔️

Calling client library browser support

The following table represents the set of supported browsers and versions which are currently available.

Windows macOS Ubuntu Linux Android iOS
Calling client library Chrome*, new Edge Chrome*, Safari** Chrome* Chrome* Chrome* Safari**

*Note that the latest version of Chrome is supported in addition to the previous two releases.

**Note that Safari versions 13.1+ are supported. Outgoing video for Safari macOS is not yet supported, but it is supported on iOS. Outgoing screen sharing is only supported on desktop iOS.

Next steps

For more information, see the following articles: