---
name: telnyx-voice-conferencing-java
description: >-
  Create and manage conference calls, queues, and multi-party sessions. Use when
  building call centers or conferencing applications. This skill provides Java
  SDK examples.
metadata:
  author: telnyx
  product: voice-conferencing
  language: java
  generated_by: telnyx-ext-skills-generator
---

<!-- Auto-generated from Telnyx OpenAPI specs. Do not edit. -->

# Telnyx Voice Conferencing - Java

## Installation

```text
<!-- Maven -->
<dependency>
    <groupId>com.telnyx.sdk</groupId>
    <artifactId>telnyx</artifactId>
    <version>6.36.0</version>
</dependency>

// Gradle
implementation("com.telnyx.sdk:telnyx:6.36.0")
```

## Setup

```java
import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;

TelnyxClient client = TelnyxOkHttpClient.fromEnv();
```

All examples below assume `client` is already initialized as shown above.

## Error Handling

All API calls can fail with network errors, rate limits (429), validation errors (422),
or authentication errors (401). Always handle errors in production code:

```java
import com.telnyx.sdk.errors.TelnyxServiceException;

try {
    var result = client.messages().send(params);
} catch (TelnyxServiceException e) {
    System.err.println("API error " + e.statusCode() + ": " + e.getMessage());
    if (e.statusCode() == 422) {
        System.err.println("Validation error — check required fields and formats");
    } else if (e.statusCode() == 429) {
        // Rate limited — wait and retry with exponential backoff
        Thread.sleep(1000);
    }
}
```

Common error codes: `401` invalid API key, `403` insufficient permissions,
`404` resource not found, `422` validation error (check field formats),
`429` rate limited (retry with exponential backoff).

## Important Notes

- **Pagination:** List methods return a page. Use `.autoPager()` for automatic iteration: `for (var item : page.autoPager()) { ... }`. For manual control, use `.hasNextPage()` and `.nextPage()`.

## Enqueue call

Put the call in a queue.

`POST /calls/{call_control_id}/actions/enqueue` — Required: `queue_name`

Optional: `client_state` (string), `command_id` (string), `keep_after_hangup` (boolean), `max_size` (integer), `max_wait_time_secs` (integer)

```java
import com.telnyx.sdk.models.calls.actions.ActionEnqueueParams;
import com.telnyx.sdk.models.calls.actions.ActionEnqueueResponse;

ActionEnqueueParams params = ActionEnqueueParams.builder()
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .queueName("support")
    .build();
ActionEnqueueResponse response = client.calls().actions().enqueue(params);
```

Returns: `result` (string)

## Remove call from a queue

Removes the call from a queue.

`POST /calls/{call_control_id}/actions/leave_queue`

Optional: `client_state` (string), `command_id` (string)

```java
import com.telnyx.sdk.models.calls.actions.ActionLeaveQueueParams;
import com.telnyx.sdk.models.calls.actions.ActionLeaveQueueResponse;

ActionLeaveQueueResponse response = client.calls().actions().leaveQueue("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ");
```

Returns: `result` (string)

## List conferences

Lists conferences. Conferences are created on demand, and will expire after all participants have left the conference or after 4 hours regardless of the number of active participants. Conferences are listed in descending order by `expires_at`.

`GET /conferences`

```java
import com.telnyx.sdk.models.conferences.ConferenceListPage;
import com.telnyx.sdk.models.conferences.ConferenceListParams;

ConferenceListPage page = client.conferences().list();
```

Returns: `connection_id` (string), `created_at` (string), `end_reason` (enum: all_left, ended_via_api, host_left, time_exceeded), `ended_by` (object), `expires_at` (string), `id` (string), `name` (string), `record_type` (enum: conference), `region` (string), `status` (enum: init, in_progress, completed), `updated_at` (string)

## Create conference

Create a conference from an existing call leg using a `call_control_id` and a conference name. Upon creating the conference, the call will be automatically bridged to the conference. Conferences will expire after all participants have left the conference or after 4 hours regardless of the number of active participants.

`POST /conferences` — Required: `call_control_id`, `name`

Optional: `beep_enabled` (enum: always, never, on_enter, on_exit), `client_state` (string), `comfort_noise` (boolean), `command_id` (string), `duration_minutes` (integer), `hold_audio_url` (string), `hold_media_name` (string), `max_participants` (integer), `region` (enum: Australia, Europe, Middle East, US), `start_conference_on_create` (boolean)

```java
import com.telnyx.sdk.models.conferences.ConferenceCreateParams;
import com.telnyx.sdk.models.conferences.ConferenceCreateResponse;

ConferenceCreateParams params = ConferenceCreateParams.builder()
    .callControlId("v3:MdI91X4lWFEs7IgbBEOT9M4AigoY08M0WWZFISt1Yw2axZ_IiE4pqg")
    .name("Business")
    .build();
ConferenceCreateResponse conference = client.conferences().create(params);
```

Returns: `connection_id` (string), `created_at` (string), `end_reason` (enum: all_left, ended_via_api, host_left, time_exceeded), `ended_by` (object), `expires_at` (string), `id` (string), `name` (string), `record_type` (enum: conference), `region` (string), `status` (enum: init, in_progress, completed), `updated_at` (string)

## List conference participants

Lists conference participants

`GET /conferences/{conference_id}/participants`

```java
import com.telnyx.sdk.models.conferences.ConferenceListParticipantsPage;
import com.telnyx.sdk.models.conferences.ConferenceListParticipantsParams;

ConferenceListParticipantsPage page = client.conferences().listParticipants("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `call_control_id` (string), `call_leg_id` (string), `conference` (object), `created_at` (string), `end_conference_on_exit` (boolean), `id` (string), `muted` (boolean), `on_hold` (boolean), `record_type` (enum: participant), `soft_end_conference_on_exit` (boolean), `status` (enum: joining, joined, left), `updated_at` (string), `whisper_call_control_ids` (array[string])

## Retrieve a conference

Retrieve an existing conference

`GET /conferences/{id}`

```java
import com.telnyx.sdk.models.conferences.ConferenceRetrieveParams;
import com.telnyx.sdk.models.conferences.ConferenceRetrieveResponse;

ConferenceRetrieveResponse conference = client.conferences().retrieve("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `connection_id` (string), `created_at` (string), `end_reason` (enum: all_left, ended_via_api, host_left, time_exceeded), `ended_by` (object), `expires_at` (string), `id` (string), `name` (string), `record_type` (enum: conference), `region` (string), `status` (enum: init, in_progress, completed), `updated_at` (string)

## End a conference

End a conference and terminate all active participants.

`POST /conferences/{id}/actions/end`

Optional: `command_id` (string)

```java
import com.telnyx.sdk.models.conferences.actions.ActionEndConferenceParams;
import com.telnyx.sdk.models.conferences.actions.ActionEndConferenceResponse;

ActionEndConferenceResponse response = client.conferences().actions().endConference("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e");
```

Returns: `result` (string)

## Gather DTMF using audio prompt in a conference

Play an audio file to a specific conference participant and gather DTMF input.

`POST /conferences/{id}/actions/gather_using_audio` — Required: `call_control_id`

Optional: `audio_url` (string), `client_state` (string), `gather_id` (string), `initial_timeout_millis` (integer), `inter_digit_timeout_millis` (integer), `invalid_audio_url` (string), `invalid_media_name` (string), `maximum_digits` (integer), `maximum_tries` (integer), `media_name` (string), `minimum_digits` (integer), `stop_playback_on_dtmf` (boolean), `terminating_digit` (string), `timeout_millis` (integer), `valid_digits` (string)

```java
import com.telnyx.sdk.models.conferences.actions.ActionGatherDtmfAudioParams;
import com.telnyx.sdk.models.conferences.actions.ActionGatherDtmfAudioResponse;

ActionGatherDtmfAudioParams params = ActionGatherDtmfAudioParams.builder()
    .id("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
    .callControlId("v3:MdI91X4lWFEs7IgbBEOT9M4AigoY08M0WWZFISt1Yw2axZ_IiE4pqg")
    .build();
ActionGatherDtmfAudioResponse response = client.conferences().actions().gatherDtmfAudio(params);
```

Returns: `result` (string)

## Hold conference participants

Hold a list of participants in a conference call

`POST /conferences/{id}/actions/hold`

Optional: `audio_url` (string), `call_control_ids` (array[string]), `media_name` (string), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionHoldParams;
import com.telnyx.sdk.models.conferences.actions.ActionHoldResponse;

ActionHoldResponse response = client.conferences().actions().hold("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Join a conference

Join an existing call leg to a conference. Issue the Join Conference command with the conference ID in the path and the `call_control_id` of the leg you wish to join to the conference as an attribute. The conference can have up to a certain amount of active participants, as set by the `max_participants` parameter in conference creation request.

`POST /conferences/{id}/actions/join` — Required: `call_control_id`

Optional: `beep_enabled` (enum: always, never, on_enter, on_exit), `client_state` (string), `command_id` (string), `end_conference_on_exit` (boolean), `hold` (boolean), `hold_audio_url` (string), `hold_media_name` (string), `mute` (boolean), `region` (enum: Australia, Europe, Middle East, US), `soft_end_conference_on_exit` (boolean), `start_conference_on_enter` (boolean), `supervisor_role` (enum: barge, monitor, none, whisper), `whisper_call_control_ids` (array[string])

```java
import com.telnyx.sdk.models.conferences.actions.ActionJoinParams;
import com.telnyx.sdk.models.conferences.actions.ActionJoinResponse;

ActionJoinParams params = ActionJoinParams.builder()
    .id("550e8400-e29b-41d4-a716-446655440000")
    .callControlId("v3:MdI91X4lWFEs7IgbBEOT9M4AigoY08M0WWZFISt1Yw2axZ_IiE4pqg")
    .build();
ActionJoinResponse response = client.conferences().actions().join(params);
```

Returns: `result` (string)

## Leave a conference

Removes a call leg from a conference and moves it back to parked state. **Expected Webhooks:**

- `conference.participant.left`

`POST /conferences/{id}/actions/leave` — Required: `call_control_id`

Optional: `beep_enabled` (enum: always, never, on_enter, on_exit), `command_id` (string), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionLeaveParams;
import com.telnyx.sdk.models.conferences.actions.ActionLeaveResponse;

ActionLeaveParams params = ActionLeaveParams.builder()
    .id("550e8400-e29b-41d4-a716-446655440000")
    .callControlId("c46e06d7-b78f-4b13-96b6-c576af9640ff")
    .build();
ActionLeaveResponse response = client.conferences().actions().leave(params);
```

Returns: `result` (string)

## Mute conference participants

Mute a list of participants in a conference call

`POST /conferences/{id}/actions/mute`

Optional: `call_control_ids` (array[string]), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionMuteParams;
import com.telnyx.sdk.models.conferences.actions.ActionMuteResponse;

ActionMuteResponse response = client.conferences().actions().mute("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Play audio to conference participants

Play audio to all or some participants on a conference call.

`POST /conferences/{id}/actions/play`

Optional: `audio_url` (string), `call_control_ids` (array[string]), `loop` (string), `media_name` (string), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionPlayParams;
import com.telnyx.sdk.models.conferences.actions.ActionPlayResponse;

ActionPlayResponse response = client.conferences().actions().play("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Conference recording pause

Pause conference recording.

`POST /conferences/{id}/actions/record_pause`

Optional: `command_id` (string), `recording_id` (string), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionRecordPauseParams;
import com.telnyx.sdk.models.conferences.actions.ActionRecordPauseResponse;

ActionRecordPauseResponse response = client.conferences().actions().recordPause("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Conference recording resume

Resume conference recording.

`POST /conferences/{id}/actions/record_resume`

Optional: `command_id` (string), `recording_id` (string), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionRecordResumeParams;
import com.telnyx.sdk.models.conferences.actions.ActionRecordResumeResponse;

ActionRecordResumeResponse response = client.conferences().actions().recordResume("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Conference recording start

Start recording the conference. Recording will stop on conference end, or via the Stop Recording command. **Expected Webhooks:**

- `conference.recording.saved`

`POST /conferences/{id}/actions/record_start` — Required: `format`

Optional: `channels` (enum: single, dual), `command_id` (string), `custom_file_name` (string), `play_beep` (boolean), `region` (enum: Australia, Europe, Middle East, US), `trim` (enum: trim-silence)

```java
import com.telnyx.sdk.models.conferences.actions.ActionRecordStartParams;
import com.telnyx.sdk.models.conferences.actions.ActionRecordStartResponse;

ActionRecordStartParams params = ActionRecordStartParams.builder()
    .id("550e8400-e29b-41d4-a716-446655440000")
    .format(ActionRecordStartParams.Format.WAV)
    .build();
ActionRecordStartResponse response = client.conferences().actions().recordStart(params);
```

Returns: `result` (string)

## Conference recording stop

Stop recording the conference. **Expected Webhooks:**

- `conference.recording.saved`

`POST /conferences/{id}/actions/record_stop`

Optional: `client_state` (string), `command_id` (string), `recording_id` (uuid), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionRecordStopParams;
import com.telnyx.sdk.models.conferences.actions.ActionRecordStopResponse;

ActionRecordStopResponse response = client.conferences().actions().recordStop("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Send DTMF to conference participants

Send DTMF tones to one or more conference participants.

`POST /conferences/{id}/actions/send_dtmf` — Required: `digits`

Optional: `call_control_ids` (array[string]), `client_state` (string), `duration_millis` (integer)

```java
import com.telnyx.sdk.models.conferences.actions.ActionSendDtmfParams;
import com.telnyx.sdk.models.conferences.actions.ActionSendDtmfResponse;

ActionSendDtmfParams params = ActionSendDtmfParams.builder()
    .id("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
    .digits("1234#")
    .build();
ActionSendDtmfResponse response = client.conferences().actions().sendDtmf(params);
```

Returns: `result` (string)

## Speak text to conference participants

Convert text to speech and play it to all or some participants.

`POST /conferences/{id}/actions/speak` — Required: `payload`, `voice`

Optional: `call_control_ids` (array[string]), `command_id` (string), `language` (enum: arb, cmn-CN, cy-GB, da-DK, de-DE, en-AU, en-GB, en-GB-WLS, en-IN, en-US, es-ES, es-MX, es-US, fr-CA, fr-FR, hi-IN, is-IS, it-IT, ja-JP, ko-KR, nb-NO, nl-NL, pl-PL, pt-BR, pt-PT, ro-RO, ru-RU, sv-SE, tr-TR), `payload_type` (enum: text, ssml), `region` (enum: Australia, Europe, Middle East, US), `voice_settings` (object)

```java
import com.telnyx.sdk.models.conferences.actions.ActionSpeakParams;
import com.telnyx.sdk.models.conferences.actions.ActionSpeakResponse;

ActionSpeakParams params = ActionSpeakParams.builder()
    .id("550e8400-e29b-41d4-a716-446655440000")
    .payload("Say this to participants")
    .voice("female")
    .build();
ActionSpeakResponse response = client.conferences().actions().speak(params);
```

Returns: `result` (string)

## Stop audio being played on the conference

Stop audio being played to all or some participants on a conference call.

`POST /conferences/{id}/actions/stop`

Optional: `call_control_ids` (array[string]), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionStopParams;
import com.telnyx.sdk.models.conferences.actions.ActionStopResponse;

ActionStopResponse response = client.conferences().actions().stop("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Unhold conference participants

Unhold a list of participants in a conference call

`POST /conferences/{id}/actions/unhold` — Required: `call_control_ids`

Optional: `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionUnholdParams;
import com.telnyx.sdk.models.conferences.actions.ActionUnholdResponse;

ActionUnholdParams params = ActionUnholdParams.builder()
    .id("550e8400-e29b-41d4-a716-446655440000")
    .addCallControlId("v3:MdI91X4lWFEs7IgbBEOT9M4AigoY08M0WWZFISt1Yw2axZ_IiE4pqg")
    .build();
ActionUnholdResponse response = client.conferences().actions().unhold(params);
```

Returns: `result` (string)

## Unmute conference participants

Unmute a list of participants in a conference call

`POST /conferences/{id}/actions/unmute`

Optional: `call_control_ids` (array[string]), `region` (enum: Australia, Europe, Middle East, US)

```java
import com.telnyx.sdk.models.conferences.actions.ActionUnmuteParams;
import com.telnyx.sdk.models.conferences.actions.ActionUnmuteResponse;

ActionUnmuteResponse response = client.conferences().actions().unmute("550e8400-e29b-41d4-a716-446655440000");
```

Returns: `result` (string)

## Update conference participant

Update conference participant supervisor_role

`POST /conferences/{id}/actions/update` — Required: `call_control_id`, `supervisor_role`

Optional: `command_id` (string), `region` (enum: Australia, Europe, Middle East, US), `whisper_call_control_ids` (array[string])

```java
import com.telnyx.sdk.models.conferences.actions.ActionUpdateParams;
import com.telnyx.sdk.models.conferences.actions.ActionUpdateResponse;
import com.telnyx.sdk.models.conferences.actions.UpdateConference;

ActionUpdateParams params = ActionUpdateParams.builder()
    .id("550e8400-e29b-41d4-a716-446655440000")
    .updateConference(UpdateConference.builder()
        .callControlId("v3:MdI91X4lWFEs7IgbBEOT9M4AigoY08M0WWZFISt1Yw2axZ_IiE4pqg")
        .supervisorRole(UpdateConference.SupervisorRole.WHISPER)
        .build())
    .build();
ActionUpdateResponse action = client.conferences().actions().update(params);
```

Returns: `result` (string)

## Retrieve a conference participant

Retrieve details of a specific conference participant by their ID or label.

`GET /conferences/{id}/participants/{participant_id}`

```java
import com.telnyx.sdk.models.conferences.ConferenceRetrieveParticipantParams;
import com.telnyx.sdk.models.conferences.ConferenceRetrieveParticipantResponse;

ConferenceRetrieveParticipantParams params = ConferenceRetrieveParticipantParams.builder()
    .id("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
    .participantId("550e8400-e29b-41d4-a716-446655440000")
    .build();
ConferenceRetrieveParticipantResponse response = client.conferences().retrieveParticipant(params);
```

Returns: `call_control_id` (string), `call_leg_id` (string), `conference_id` (string), `created_at` (date-time), `end_conference_on_exit` (boolean), `id` (string), `label` (string), `muted` (boolean), `on_hold` (boolean), `soft_end_conference_on_exit` (boolean), `status` (enum: joining, joined, left), `updated_at` (date-time), `whisper_call_control_ids` (array[string])

## Update a conference participant

Update properties of a conference participant.

`PATCH /conferences/{id}/participants/{participant_id}`

Optional: `beep_enabled` (enum: always, never, on_enter, on_exit), `end_conference_on_exit` (boolean), `soft_end_conference_on_exit` (boolean)

```java
import com.telnyx.sdk.models.conferences.ConferenceUpdateParticipantParams;
import com.telnyx.sdk.models.conferences.ConferenceUpdateParticipantResponse;

ConferenceUpdateParticipantParams params = ConferenceUpdateParticipantParams.builder()
    .id("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
    .participantId("550e8400-e29b-41d4-a716-446655440000")
    .build();
ConferenceUpdateParticipantResponse response = client.conferences().updateParticipant(params);
```

Returns: `call_control_id` (string), `call_leg_id` (string), `conference_id` (string), `created_at` (date-time), `end_conference_on_exit` (boolean), `id` (string), `label` (string), `muted` (boolean), `on_hold` (boolean), `soft_end_conference_on_exit` (boolean), `status` (enum: joining, joined, left), `updated_at` (date-time), `whisper_call_control_ids` (array[string])

## List queues

List all queues for the authenticated user.

`GET /queues`

```java
import com.telnyx.sdk.models.queues.QueueListPage;
import com.telnyx.sdk.models.queues.QueueListParams;

QueueListPage page = client.queues().list();
```

Returns: `average_wait_time_secs` (integer), `created_at` (string), `current_size` (integer), `id` (string), `max_size` (integer), `name` (string), `record_type` (enum: queue), `updated_at` (string)

## Create a queue

Create a new call queue.

`POST /queues` — Required: `queue_name`

Optional: `max_size` (integer)

```java
import com.telnyx.sdk.models.queues.QueueCreateParams;
import com.telnyx.sdk.models.queues.QueueCreateResponse;

QueueCreateParams params = QueueCreateParams.builder()
    .queueName("tier_1_support")
    .build();
QueueCreateResponse queue = client.queues().create(params);
```

Returns: `average_wait_time_secs` (integer), `created_at` (string), `current_size` (integer), `id` (string), `max_size` (integer), `name` (string), `record_type` (enum: queue), `updated_at` (string)

## Retrieve a call queue

Retrieve an existing call queue

`GET /queues/{queue_name}`

```java
import com.telnyx.sdk.models.queues.QueueRetrieveParams;
import com.telnyx.sdk.models.queues.QueueRetrieveResponse;

QueueRetrieveResponse queue = client.queues().retrieve("queue_name");
```

Returns: `average_wait_time_secs` (integer), `created_at` (string), `current_size` (integer), `id` (string), `max_size` (integer), `name` (string), `record_type` (enum: queue), `updated_at` (string)

## Update a queue

Update properties of an existing call queue.

`POST /queues/{queue_name}` — Required: `max_size`

```java
import com.telnyx.sdk.models.queues.QueueUpdateParams;
import com.telnyx.sdk.models.queues.QueueUpdateResponse;

QueueUpdateParams params = QueueUpdateParams.builder()
    .queueName("my-queue")
    .maxSize(200L)
    .build();
QueueUpdateResponse queue = client.queues().update(params);
```

Returns: `average_wait_time_secs` (integer), `created_at` (string), `current_size` (integer), `id` (string), `max_size` (integer), `name` (string), `record_type` (enum: queue), `updated_at` (string)

## Delete a queue

Delete an existing call queue.

`DELETE /queues/{queue_name}`

```java
import com.telnyx.sdk.models.queues.QueueDeleteParams;

client.queues().delete("queue_name");
```

## Retrieve calls from a queue

Retrieve the list of calls in an existing queue

`GET /queues/{queue_name}/calls`

```java
import com.telnyx.sdk.models.queues.calls.CallListPage;
import com.telnyx.sdk.models.queues.calls.CallListParams;

CallListPage page = client.queues().calls().list("queue_name");
```

Returns: `call_control_id` (string), `call_leg_id` (string), `call_session_id` (string), `connection_id` (string), `enqueued_at` (string), `from` (string), `is_alive` (boolean), `queue_id` (string), `queue_position` (integer), `record_type` (enum: queue_call), `to` (string), `wait_time_secs` (integer)

## Retrieve a call from a queue

Retrieve an existing call from an existing queue

`GET /queues/{queue_name}/calls/{call_control_id}`

```java
import com.telnyx.sdk.models.queues.calls.CallRetrieveParams;
import com.telnyx.sdk.models.queues.calls.CallRetrieveResponse;

CallRetrieveParams params = CallRetrieveParams.builder()
    .queueName("my-queue")
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .build();
CallRetrieveResponse call = client.queues().calls().retrieve(params);
```

Returns: `call_control_id` (string), `call_leg_id` (string), `call_session_id` (string), `connection_id` (string), `enqueued_at` (string), `from` (string), `is_alive` (boolean), `queue_id` (string), `queue_position` (integer), `record_type` (enum: queue_call), `to` (string), `wait_time_secs` (integer)

## Update queued call

Update queued call's keep_after_hangup flag

`PATCH /queues/{queue_name}/calls/{call_control_id}`

Optional: `keep_after_hangup` (boolean)

```java
import com.telnyx.sdk.models.queues.calls.CallUpdateParams;

CallUpdateParams params = CallUpdateParams.builder()
    .queueName("my-queue")
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .build();
client.queues().calls().update(params);
```

## Force remove a call from a queue

Removes an inactive call from a queue. If the call is no longer active, use this command to remove it from the queue.

`DELETE /queues/{queue_name}/calls/{call_control_id}`

```java
import com.telnyx.sdk.models.queues.calls.CallRemoveParams;

CallRemoveParams params = CallRemoveParams.builder()
    .queueName("my-queue")
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .build();
client.queues().calls().remove(params);
```

---

## Webhooks

### Webhook Verification

Telnyx signs webhooks with Ed25519. Each request includes `telnyx-signature-ed25519`
and `telnyx-timestamp` headers. Always verify signatures in production:

```java
import com.telnyx.sdk.core.UnwrapWebhookParams;
import com.telnyx.sdk.core.http.Headers;

// In your webhook handler (e.g., Spring — use raw body):
@PostMapping("/webhooks")
public ResponseEntity<String> handleWebhook(
    @RequestBody String payload,
    HttpServletRequest request) {
  try {
    Headers headers = Headers.builder()
        .put("telnyx-signature-ed25519", request.getHeader("telnyx-signature-ed25519"))
        .put("telnyx-timestamp", request.getHeader("telnyx-timestamp"))
        .build();
    var event = client.webhooks().unwrap(
        UnwrapWebhookParams.builder()
            .body(payload)
            .headers(headers)
            .build());
    // Signature valid — process the event
    System.out.println("Received webhook event");
    return ResponseEntity.ok("OK");
  } catch (Exception e) {
    System.err.println("Webhook verification failed: " + e.getMessage());
    return ResponseEntity.badRequest().body("Invalid signature");
  }
}
```

The following webhook events are sent to your configured webhook URL.
All webhooks include `telnyx-timestamp` and `telnyx-signature-ed25519` headers for Ed25519 signature verification. Use `client.webhooks.unwrap()` to verify.

| Event | Description |
|-------|-------------|
| `callEnqueued` | Call Enqueued |
| `callLeftQueue` | Call Left Queue |
| `conferenceCreated` | Conference Created |
| `conferenceEnded` | Conference Ended |
| `conferenceFloorChanged` | Conference Floor Changed |
| `conferenceParticipantJoined` | Conference Participant Joined |
| `conferenceParticipantLeft` | Conference Participant Left |
| `conferenceParticipantPlaybackEnded` | Conference Participant Playback Ended |
| `conferenceParticipantPlaybackStarted` | Conference Participant Playback Started |
| `conferenceParticipantSpeakEnded` | Conference Participant Speak Ended |
| `conferenceParticipantSpeakStarted` | Conference Participant Speak Started |
| `conferencePlaybackEnded` | Conference Playback Ended |
| `conferencePlaybackStarted` | Conference Playback Started |
| `conferenceRecordingSaved` | Conference Recording Saved |
| `conferenceSpeakEnded` | Conference Speak Ended |
| `conferenceSpeakStarted` | Conference Speak Started |

### Webhook payload fields

**`callEnqueued`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: call.enqueued | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |
| `data.payload.call_control_id` | string | Call ID used to issue commands via Call Control API. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.queue` | string | The name of the queue |
| `data.payload.current_position` | integer | Current position of the call in the queue. |
| `data.payload.queue_avg_wait_time_secs` | integer | Average time call spends in the queue in seconds. |

**`callLeftQueue`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: call.dequeued | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |
| `data.payload.call_control_id` | string | Call ID used to issue commands via Call Control API. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.queue` | string | The name of the queue |
| `data.payload.queue_position` | integer | Last position of the call in the queue. |
| `data.payload.reason` | enum: bridged, bridging-in-process, hangup, leave, timeout | The reason for leaving the queue |
| `data.payload.wait_time_secs` | integer | Time call spent in the queue in seconds. |

**`conferenceCreated`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.created | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.call_control_id` | string | Call ID used to issue commands via Call Control API. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.conference_id` | string | Conference ID that the participant joined. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferenceEnded`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.ended | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.call_control_id` | string | Call ID used to issue commands via Call Control API. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.conference_id` | string | Conference ID that the participant joined. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |
| `data.payload.reason` | enum: all_left, host_left, time_exceeded | Reason the conference ended. |

**`conferenceFloorChanged`**

| Field | Type | Description |
|-------|------|-------------|
| `record_type` | enum: event | Identifies the type of the resource. |
| `event_type` | enum: conference.floor.changed | The type of event being delivered. |
| `id` | uuid | Identifies the type of resource. |
| `payload.call_control_id` | string | Call Control ID of the new speaker. |
| `payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `payload.call_leg_id` | string | Call Leg ID of the new speaker. |
| `payload.call_session_id` | string | Call Session ID of the new speaker. |
| `payload.client_state` | string | State received from a command. |
| `payload.conference_id` | string | Conference ID that had a speaker change event. |
| `payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferenceParticipantJoined`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.participant.joined | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |
| `data.payload.call_control_id` | string | Call ID used to issue commands via Call Control API. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.conference_id` | string | Conference ID that the participant joined. |

**`conferenceParticipantLeft`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.participant.left | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |
| `data.payload.call_control_id` | string | Call ID used to issue commands via Call Control API. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.conference_id` | string | Conference ID that the participant joined. |

**`conferenceParticipantPlaybackEnded`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.participant.playback.ended | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.call_control_id` | string | Participant's call ID used to issue commands via Call Control API. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.media_url` | string | The audio URL being played back, if audio_url has been used to start. |
| `data.payload.media_name` | string | The name of the audio media file being played back, if media_name has been used to start. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferenceParticipantPlaybackStarted`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.participant.playback.started | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.call_control_id` | string | Participant's call ID used to issue commands via Call Control API. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.media_url` | string | The audio URL being played back, if audio_url has been used to start. |
| `data.payload.media_name` | string | The name of the audio media file being played back, if media_name has been used to start. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferenceParticipantSpeakEnded`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.participant.speak.ended | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.call_control_id` | string | Participant's call ID used to issue commands via Call Control API. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferenceParticipantSpeakStarted`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.participant.speak.started | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.call_control_id` | string | Participant's call ID used to issue commands via Call Control API. |
| `data.payload.call_leg_id` | string | ID that is unique to the call and can be used to correlate webhook events. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferencePlaybackEnded`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.playback.ended | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.media_url` | string | The audio URL being played back, if audio_url has been used to start. |
| `data.payload.media_name` | string | The name of the audio media file being played back, if media_name has been used to start. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferencePlaybackStarted`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.playback.started | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.media_url` | string | The audio URL being played back, if audio_url has been used to start. |
| `data.payload.media_name` | string | The name of the audio media file being played back, if media_name has been used to start. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferenceRecordingSaved`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.recording.saved | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.call_control_id` | string | Participant's call ID used to issue commands via Call Control API. |
| `data.payload.call_session_id` | string | ID that is unique to the call session and can be used to correlate webhook events. |
| `data.payload.client_state` | string | State received from a command. |
| `data.payload.channels` | enum: single, dual | Whether recording was recorded in `single` or `dual` channel. |
| `data.payload.conference_id` | uuid | ID of the conference that is being recorded. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.format` | enum: wav, mp3 | The audio file format used when storing the call recording. |
| `data.payload.recording_ended_at` | date-time | ISO 8601 datetime of when recording ended. |
| `data.payload.recording_id` | uuid | ID of the conference recording. |
| `data.payload.recording_started_at` | date-time | ISO 8601 datetime of when recording started. |

**`conferenceSpeakEnded`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.speak.ended | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |

**`conferenceSpeakStarted`**

| Field | Type | Description |
|-------|------|-------------|
| `data.record_type` | enum: event | Identifies the type of the resource. |
| `data.event_type` | enum: conference.speak.started | The type of event being delivered. |
| `data.id` | uuid | Identifies the type of resource. |
| `data.payload.connection_id` | string | Call Control App ID (formerly Telnyx connection ID) used in the call. |
| `data.payload.creator_call_session_id` | string | ID that is unique to the call session that started the conference. |
| `data.payload.conference_id` | string | ID of the conference the text was spoken in. |
| `data.payload.occurred_at` | date-time | ISO 8601 datetime of when the event occurred. |