--- title: Categorized Overview slug: voice-apis/AE2D-categorized-overview docTags: createdAt: 2026-01-20T03:43:18.019Z --- # Introduction Leg Actions are executed on an active **call leg** to control **media**, **call state**, **routing**, **recording**, and **real-time integrations**. Use this page to **quickly discover the right action** before diving into detailed API reference pages. ## A. Media & Interaction Actions These actions control **what the participant hears, says, or inputs** during a call. - **\ **Plays an audio file from a URL to the leg. - **\ **Stops an ongoing audio playback. - **\ **Converts text to speech and plays it to the leg. Supports **Amazon Polly** and **Google TTS**. - **\ **Stops an ongoing text-to-speech playback. - **\ **Plays a sequence of media actions (e.g., Play → Say → Play) in order. - **\ **Collects DTMF digits (for IVR menus, PIN entry, confirmations). - **\ **Plays DTMF tones *out* to the leg (used to interact with downstream IVRs). ## B. Call State Control These actions manage the **lifecycle and audio state** of a call leg. - **\ **Picks up an incoming leg. - **\ **Terminates the leg immediately. - **\ / \ **Mutes or unmutes audio on the leg. Supports direction control: in, out, or both. - **\ / \ **Places the leg on hold and resumes it. Supports optional **Music on Hold (MOH)** using nested \. ## C. Connectivity & Routing Advanced actions for **connecting legs, conferencing, and supervision**. - **\ **Creates a new outbound leg and bridges it to the current leg. Supports PSTN and VoIP destinations. - **\ **Moves the leg into an existing multi-party bridge. - **\ **Removes the leg from a bridge. - **\ **Allows a supervisor to **listen** or **whisper** on another leg (rxAudio: muted / enabled). - **\ **Stops an active monitoring session. ## D. Recording Actions These actions manage **call recordings** at the leg level. - **\ **Starts recording audio on the leg. Supports multiple formats and storage options (S3 / HTTPS). - **\ **Stops an active recording and finalizes the recording file. ## E. Streaming & Real-Time Integrations Used for **voice bots, real-time analytics, and AI processing**. - **\ **Streams live audio from the leg to a WebSocket endpoint.Supports unidirectional and bidirectional streaming. - **\ **Stops an active audio stream. ## F. Control & Event Routing Actions that affect **control ownership and event delivery**. - **\ **Updates the external **event delivery endpoint (gRPC)** for the leg.Used when control needs to be transferred between systems. ## Quick Summary Table | **Category** | **Actions** | | ----------------------- | ------------------------------------------------------------------- | | Media & Interaction | StartPlay, StopPlay, Say, StopSay, PlaySequence, Gather, SendDigits | | Call State Control | Answer, Hangup, Mute, UnMute, Hold, UnHold | | Connectivity & Routing | Dial, JoinBridge, LeaveBridge, StartMonitoring, StopMonitoring | | Recording | StartRecording, StopRecording | | Streaming | StartStream, StopStream | | Control & Event Routing | Refer |