Answer call

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const response = await client.calls.actions.answer('call_control_id');

console.log(response.data);

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),  # This is the default and can be omitted
)
response = client.calls.actions.answer(
    call_control_id="call_control_id",
)
print(response.data)

package main

import (
	"context"
	"fmt"

	"github.com/team-telnyx/telnyx-go"
	"github.com/team-telnyx/telnyx-go/option"
)

func main() {
	client := telnyx.NewClient(
		option.WithAPIKey("My API Key"),
	)
	response, err := client.Calls.Actions.Answer(
		context.TODO(),
		"call_control_id",
		telnyx.CallActionAnswerParams{},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", response.Data)
}

package com.telnyx.sdk.example;

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
import com.telnyx.sdk.models.calls.actions.ActionAnswerParams;
import com.telnyx.sdk.models.calls.actions.ActionAnswerResponse;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        TelnyxClient client = TelnyxOkHttpClient.fromEnv();

        ActionAnswerResponse response = client.calls().actions().answer("call_control_id");
    }
}

require "telnyx"

telnyx = Telnyx::Client.new(api_key: "My API Key")

response = telnyx.calls.actions.answer("call_control_id")

puts(response)

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Telnyx\Client;
use Telnyx\Calls\StreamBidirectionalCodec;
use Telnyx\Calls\StreamBidirectionalMode;
use Telnyx\Calls\StreamBidirectionalTargetLegs;
use Telnyx\Calls\StreamCodec;
use Telnyx\Calls\Actions\GoogleTranscriptionLanguage;
use Telnyx\Core\Exceptions\APIException;

$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');

try {
  $response = $client->calls->actions->answer(
    'call_control_id',
    assistant: [
      'id' => 'asst_123',
      'dynamicVariables' => [
        'customer_name' => 'John', 'account_id' => 'ACC-12345'
      ],
      'externalLlm' => [
        'authenticationMethod' => 'token',
        'baseURL' => 'base_url',
        'certificateRef' => 'certificate_ref',
        'forwardMetadata' => true,
        'llmAPIKeyRef' => 'llm_api_key_ref',
        'model' => 'model',
        'tokenRetrievalURL' => 'token_retrieval_url',
      ],
      'fallbackConfig' => [
        'externalLlm' => [
          'authenticationMethod' => 'token',
          'baseURL' => 'base_url',
          'certificateRef' => 'certificate_ref',
          'forwardMetadata' => true,
          'llmAPIKeyRef' => 'llm_api_key_ref',
          'model' => 'model',
          'tokenRetrievalURL' => 'token_retrieval_url',
        ],
        'llmAPIKeyRef' => 'llm_api_key_ref',
        'model' => 'model',
      ],
      'greeting' => 'Hi, I\'m your assistant. How can I help?',
      'instructions' => 'You are a friendly voice assistant.',
      'llmAPIKeyRef' => 'my_llm_api_key',
      'mcpServers' => [['foo' => 'bar']],
      'model' => 'gpt-4o',
      'name' => 'name',
      'observabilitySettings' => ['foo' => 'bar'],
      'openaiAPIKeyRef' => 'my_openai_api_key',
      'tools' => [
        ['hangup' => ['description' => 'description'], 'type' => 'hangup']
      ],
    ],
    billingGroupID: 'f5586561-8ff0-4291-a0ac-84fe544797bd',
    clientState: 'aGF2ZSBhIG5pY2UgZGF5ID1d',
    commandID: '891510ac-f3e4-11e8-af5b-de00688a4901',
    conversationRelayConfig: [
      'url' => 'wss://example.com/conversation-relay',
      'customParameters' => ['customer_id' => 'bar'],
      'dtmfDetection' => true,
      'greeting' => 'Hi! Ask me anything!',
      'interruptible' => 'speech',
      'interruptibleGreeting' => 'dtmf',
      'interruptionSettings' => [
        'enable' => true,
        'interruptible' => 'speech',
        'interruptibleGreeting' => 'speech',
        'welcomeGreetingInterruptible' => 'speech',
      ],
      'language' => 'en-US',
      'languages' => [
        [
          'language' => 'en-US',
          'speechModel' => 'nova-3',
          'transcriptionEngine' => 'Deepgram',
          'transcriptionEngineConfig' => ['transcription_model' => 'bar'],
          'transcriptionProvider' => 'Deepgram',
          'ttsProvider' => 'telnyx',
          'voice' => 'Telnyx.Ultra.alloy',
          'voiceSettings' => [
            'type' => 'elevenlabs', 'apiKeyRef' => 'my_elevenlabs_api_key'
          ],
        ],
      ],
      'provider' => 'elevenlabs',
      'structuredProvider' => ['voice_id' => 'bar', 'model_id' => 'bar'],
      'transcriptionEngine' => 'Google',
      'transcriptionEngineConfig' => [
        'transcription_model' => 'bar',
        'interim_results' => 'bar',
        'keywords_boosting' => 'bar',
      ],
      'ttsProvider' => 'telnyx',
      'voice' => 'Telnyx.KokoroTTS.af',
      'voiceSettings' => ['type' => 'telnyx', 'voiceSpeed' => 1],
    ],
    customHeaders: [
      ['name' => 'head_1', 'value' => 'val_1'],
      ['name' => 'head_2', 'value' => 'val_2'],
    ],
    deepfakeDetection: ['enabled' => true, 'rtpTimeout' => 30, 'timeout' => 15],
    preferredCodecs: 'G722,PCMU,PCMA,G729,OPUS,VP8,H264',
    record: 'record-from-answer',
    recordChannels: 'single',
    recordCustomFileName: 'my_recording_file_name',
    recordFormat: 'wav',
    recordMaxLength: 1000,
    recordTimeoutSecs: 100,
    recordTrack: 'outbound',
    recordTrim: 'trim-silence',
    sendSilenceWhenIdle: true,
    sipHeaders: [['name' => 'User-to-User', 'value' => 'value']],
    soundModifications: [
      'octaves' => 0.1, 'pitch' => 0.8, 'semitone' => -2, 'track' => 'both'
    ],
    streamBidirectionalCodec: StreamBidirectionalCodec::G722,
    streamBidirectionalMode: StreamBidirectionalMode::RTP,
    streamBidirectionalTargetLegs: StreamBidirectionalTargetLegs::BOTH,
    streamCodec: StreamCodec::PCMA,
    streamTrack: 'both_tracks',
    streamURL: 'wss://www.example.com/websocket',
    transcription: true,
    transcriptionConfig: [
      'clientState' => 'aGF2ZSBhIG5pY2UgZGF5ID1d',
      'commandID' => '891510ac-f3e4-11e8-af5b-de00688a4901',
      'transcriptionEngine' => 'Google',
      'transcriptionEngineConfig' => [
        'enableSpeakerDiarization' => true,
        'hints' => ['string'],
        'interimResults' => true,
        'language' => GoogleTranscriptionLanguage::EN,
        'maxSpeakerCount' => 4,
        'minSpeakerCount' => 4,
        'model' => 'latest_long',
        'profanityFilter' => true,
        'speechContext' => [['boost' => 1, 'phrases' => ['string']]],
        'transcriptionEngine' => 'Google',
        'useEnhanced' => true,
      ],
      'transcriptionTracks' => 'both',
    ],
    webhookRetriesPolicies: [
      'call.hangup' => ['retriesMs' => [1000, 2000, 5000]]
    ],
    webhookURL: 'https://www.example.com/server-b/',
    webhookURLMethod: 'POST',
    webhookURLs: [
      'call.hangup' => 'https://www.example.com/webhooks/hangup',
      'call.bridge' => 'https://www.example.com/webhooks/bridge',
    ],
    webhookURLsMethod: 'POST',
  );

  var_dump($response);
} catch (APIException $e) {
  echo $e->getMessage();
}

telnyx calls:actions answer \
  --api-key 'My API Key' \
  --call-control-id call_control_id

curl --request POST \
  --url https://api.telnyx.com/v2/calls/{call_control_id}/actions/answer \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "assistant": {
    "id": "asst_123"
  },
  "client_state": "aGF2ZSBhIG5pY2UgZGF5ID1d",
  "command_id": "891510ac-f3e4-11e8-af5b-de00688a4901",
  "webhook_url": "https://www.example.com/server-b/",
  "webhook_url_method": "POST",
  "send_silence_when_idle": true,
  "deepfake_detection": {
    "enabled": true,
    "timeout": 15,
    "rtp_timeout": 30
  }
}
'