Nexmo Call Control Objects
Experience more flexibility using a JSON array of actions to control the flow of your Voice API calls.
Create globally supported audio conferences with just a few lines of code.
Enable a rich calling experience with customized voice prompts and hold music.
Auto-Join Conference Calls
Make conference calls effortless by having callers automatically join as a meeting begins.
Answering Machine Detection
Provide a customized experience depending on whether a live person or answering machine is reached.
Integrate stored call recordings with your preferred workflow tools or build your own dashboard.
Scale your calls globally with the ability to speak text to callers in multiple languages and accents.
Easily stream stored media audio files right from your Nexmo Call Control Object (NCCO).
Split/Multitrack Recording (Beta)
Record up to 32 call participants in separate tracks to enable more accurate call transcription, content search, sentiment analysis and more.
Speech Synthesis Markup Language (SSML)
Programmatically control the pronunciation of text, including punctuation, pausing, emphasis, volume, pitch, rate of speech, phonetic pronunciation and context disambiguation.
Selective Audio Controls (Beta)
Establish an exclusive audio feed for a select call participant to provide feedback and guidance during any conversation.
Globally Distributed Call Controls
Keep your call control signaling local with our global distribution of data centers to reduce latency and improve overall call quality.
SIP Connect (beta)
Bring feature rich calling to your SIP deployment with Split/Multitrack Recording, TTS, Websocket connectivity and more.