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# Release History
## 1.5.0 (2025-09-10)
### Features Added
- Added support for Teams multipersona users in create call, add participant, transfer, and redirect scenarios in OPS calls
- Added TeamsAppSource for use when creating outbound OPS calls
- Recording with the call connection ID is now supported. OPS calls can be recorded using the call connection ID.
- Adds support for SIP headers prefixed with 'X-' and 'X-MS-Custom-' within the CustomCallingContext.
### Breaking Changes
- The properties `media_streaming_subscription` and `transcription_subscription` of `CallConnectionProperties` are no longer subclasses of the internal `Model` baseclass, and no longer have the inherited methods.
- The following attributes have now been typed as `Optional` to reflect the actual behaviour: `CallParticipant.is_muted`, `CallParticipant.is_on_hold`, `AddParticipantResult.invitation_id`, `CancelAddParticipantOperationResult.invitation_id`.
- The models `FileSource` and `ChannelAffinity` will no longer accept arbitrary keyword args in the constructor.
### Bugs fixed
- Fixed range specification for download_recording.
- Fixed serialization of participant ordering for start_recording.
## 1.4.0 (2025-06-06)
### Features Added
- Real-time transcription support
- Audio and DTMF streaming capabilities
- Integration of ConnectAPI for seamless streaming and transcription
- Improved media streaming with bidirectional functionality, allowing audio formats in both directions, currently supporting sample rates of 24kHz and 16kHz
- Support for custom speech models has been integrated into transcription
- A confidence level for recognized speech has been introduced, ranging from 0.0 to 1.0 when available
## 1.4.0b1 (2024-11-22)
### Features Added
- Added support for ConnectAPI to enable streaming and real-time transcription
- Enhanced media streaming with bidirectional capabilities, enabling support for audio formats in both directions. Currently, it supports sample rates of 24kHz and 16kHz
### Other Changes
- Introduced audio streaming and transcription data parsing capabilities.
## 1.3.0 (2024-11-22)
### Features Added
- Support multiple play sources for Play and Recognize
- Support for PlayStarted event in Play/Recognize
- Hold and Unhold the participant
- CallDisconnected now includes more information on why the call has ended
- Support to manage the rooms/servercall/group call using connect API
- Expose original PSTN number target from incoming call event in call connection properties
- Support for VoIP to PSTN transfer scenario
### Other Changes
- Added CreateCallFailed event to signify when create call API fails to establish a call
- Added AnswerFailed event to signify when answer call API fails to answer a call
## 1.3.0b2 (2024-10-28)
### Features Added
- Added CreateCallFailed event to signify when create call API fails to establish a call
## 1.3.0b1 (2024-08-02)
### Features Added
- Support multiple play sources for Play and Recognize
- Support for PlayStarted event in Play/Recognize
- Support for the real time transcription
- Monetization for real-time transcription and audio streaming
- Hold and Unhold the participant
- Support to manage the rooms/servercall/group call using connect API
- Support for the audio streaming
- Expose original PSTN number target from incoming call event in call connection properties
- Support for VoIP to PSTN transfer scenario
## 1.2.0 (2024-04-15)
### Features Added
- Support for Bring Your Own Storage recording option
- Support for PauseOnStart recording option
- Support for Recording state change with new recording kind's
### Other Changes
- Support for MicrosoftTeamsAppIdentifier CommunicationIdentifier
## 1.1.0 (2023-11-23)
### Features Added
- Mid Call actions support overriding callback url.
- Cancel adding Participant invitation.
- Support transfer a participant in a group call to another participant.
- Add Custom Context payload to Transfer and AddParticipant API.
## 1.1.0b1 (2023-08-17)
### Features Added
- Play and recognize supports TTS and SSML source prompts.
- Recognize supports choices and freeform speech.
- Start/Stop continuous DTMF recognition by subscribing/unsubscribing to tones.
- Send DTMF tones to a participant in the call.
- Mute participants in the call.
### Other Changes
- The models `ServerCallLocator` and `GroupCallLocator` have been deprecated, and the ID values can now be passed directly into `CallAutomationClient.start_recording` as keyword arguments.
- The model `CallInvite` has been deprecated and now the target `CommunicationIdentifier` and associated properties can be passed directly into `create_call`, `redirect_call` and `add_participant`.
- The method `CallAutomationClient.create_group_call` has been deprecated, this can now be achieved by passing a list of `CommunicationIdentifier`s into `create_call`.
- The method `CallConnectionClient.play_media_to_all` has been deprecated, this can now be achieved as the default behaviour of `play_media`.
- The `MicrosoftBotIdentifier` has been deprecated.
## 1.0.0 (2023-06-14)
Call Automation enables developers to build call workflows. Personalise customer interactions by listening to call events and take actions based on your business logic. For more information, please see the [README][read_me].
### Features Added
- Create outbound calls to an Azure Communication Service user or a phone number.
- Answer/Redirect/Reject incoming call from an Azure Communication Service user or a phone number.
- Transfer the call to another participant.
- List, add or remove participant from the call.
- Hangup or terminate the call.
- Play audio files to one or more participants in the call.
- Recognize incoming DTMF in the call.
- Record calls with option to start/resume/stop.
- Record mixed and unmixed audio recordings.
- Download recordings.
<!-- LINKS -->
[read_me]: https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/communication/Azure.Communication.CallAutomation/README.md
[Overview]: https://learn.microsoft.com/azure/communication-services/concepts/voice-video-calling/call-automation
[Demo Video]: https://ignite.microsoft.com/sessions/14a36f87-d1a2-4882-92a7-70f2c16a306a
[Incoming Call Concept]: https://learn.microsoft.com/azure/communication-services/concepts/voice-video-calling/incoming-call-notification
[Build a customer interaction workflow using Call Automation]: https://learn.microsoft.com/azure/communication-services/quickstarts/voice-video-calling/callflows-for-customer-interactions
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