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> For a complete documentation index, see https://docs.jambonz.org/reference/websocket-api/call-control/command/llms.txt.
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# command

> > websocket server => jambonz

A `command` message is sent by the websocket server to jambonz when the server wants to asynchronously provide a new set of instructions to jambonz.

| property     | type             | meaning                                                                                                                                                      | required |
| ------------ | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | -------- |
| type         | string "command" | indicates this is a command message                                                                                                                          | yes      |
| command      | string           | describes the action to take, see allowed commands below                                                                                                     | yes      |
| queueCommand | boolean          | if true, queue this command until previous commands are completed; otherwise, interrupt and flush all previous commands and execute this command immediately | no       |
| data         | array or object  | data pertaining to the requested command                                                                                                                     | yes      |

The `command` property must be one of the values shown below.

> Note: `redirect` is the most commonly-used value.

| command value    | meaning                                                                    | data requirements                                                                                                                                                                                                                                                                                                                              |
| ---------------- | -------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| redirect         | execute the application provided                                           | data must be an array of jambonz verbs; i.e. a jambonz application.                                                                                                                                                                                                                                                                            |
| call:status      | change the call status (e.g. hangup the call)                              | data must include a `call_status` property with a value of 'completed' or 'no-answer'                                                                                                                                                                                                                                                          |
| mute:status      | mute or unmute the call                                                    | data must include a `mute_status` property with a value of 'mute' or 'unmute'                                                                                                                                                                                                                                                                  |
| conf:mute-status | mute or unmute all non-moderator conference legs                           | data must include a `conf_mute_status` property with a value of either 'mute' or 'unmute'                                                                                                                                                                                                                                                      |
| conf:hold-status | place a conference leg on hold or take off hold                            | data must include a `conf_hold_status` property with a value of either 'hold' or 'unhold'                                                                                                                                                                                                                                                      |
| listen:status    | Change the status of a listen stream                                       | data must include a `listen_status` property with a value of 'pause' or 'resume'                                                                                                                                                                                                                                                               |
| record           | manage call recording that is done via SIPREC to a remote recording server | data must include an `action` with one of "startCallRecording", "stopCallRecording", "pauseCallRecording", or "resumeCallRecording".  When starting a recording you must also supply "recordingID" and  "siprecServerURL".  You may optionally supply a `headers` object with custom headers to be sent to the remote SIPREC recording server. |
| whisper          | Play a whisper prompt to the caller (i.e only one party hears the prompt)  | data must include a `whisper` property that can be an array of say or play verbs                                                                                                                                                                                                                                                               |
| sip:request      | Send a SIP INFO, NOTIFY, or MESSAGE request to the far end party           | data must include a 'method' property (allowed values: 'INFO', 'NOTIFY', 'MESSAGE') and can include 'content\_type', 'content', and 'headers' properties.                                                                                                                                                                                      |
| dub              | add, remove or operate on a dub track.                                     | The data must include the properties defined for the [dub](./docs/webhooks/dub) verb                                                                                                                                                                                                                                                           |

> Note: In the data payload when `redirect` is used, each jambonz verb in the `data` array may optionally include an `id` property.  If present, jambonz will provide `verb:status` notifications when the verb starts and ends execution.

```json
 {
  "type": "command",
  "command": "redirect",
  "queueCommand": true,
  "data": [
    {
      "say": {
        "id": "b5e39996",
        "text": "Hello it's me Mario"
      }
    }
  ]
}
```