CALL PACING

Fire-and-forget outbound call pacing

Call pacing automates the rate of outbound calls so you hit delivery windows, avoid carrier limits, and stay TCPA compliant. With Sinch Voice API, you set the target and the platform handles CPS, timing, and queueing for your automated calling campaigns. 

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Trusted by 190,000+ customers around the world

AT A GLANCE 

End-to-end pacing without the headaches

Intelligent queuing, real-time visibility, and flexible delivery come standard – ideal for teams sending 10K+ automated calls each month.

Set it and forget it

Submit your list and desired completion time; Sinch automatically manages caller CPS limits and timing.

Real-time control

Monitor queued, in-progress, completed, and failed calls live, and pause or stop campaigns anytime via API.

Higher connect rates

Pacing tuned for carrier acceptance and spam protection helps messages reach people on time.

AUTOMATION

No more complex throttling logic

Sinch intelligently queues and paces calls based on configurable CPS limits, freeing engineers from brittle in-house scripts and keeping campaigns on schedule.

  • TTL (Time-to-Live): Set a maximum time window for initiating queued calls

  • Flexible CPS allocation per service

  • Engineering teams reclaim valuable hours

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VISIBILITY

Full campaign control in real time

Track the state of the calls: queued, in progress, completed, or failed. Define campaign length using time-to-live (TTL) and stop mid-flight without impacting calls in progress.

  • Build your own dashboards with API and SVAML webhook data

  • Set batch time-to-live (TTL) in seconds

  • Instantly react to changing business needs

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DELIVERY

Boost connection rates and stay compliant

Intelligent pacing helps manage outbound call flow with controlled queueing and batch time-to-live (TTL) for queued calls. Supports TCPA-compliant calling and helps meet FCC regulation expectations with time-of-day restrictions and carrier-friendly pacing.

  • Configurable CPS controls

  • Set batch time-to-live (TTL) in seconds

  • Works with Answering Machine Detection and 550+ text to speech voices for notifications

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WHO USES CALL PACING

Proven across high-volume industries

Healthcare appointment reminders

Hospitals send 50K+ confirmations daily within four-hour windows.

Survey & feedback campaigns

Enterprises run large-scale customer satisfaction surveys without manual pacing delays or carrier blocks.

Marketing campaigns

Reach audiences at the right speed, avoiding spam flags and boosting answer rates for promotions. 

Finance fraud alerts  

Pace high-volume verification and fraud notification calls to meet strict delivery windows without carrier blocks.

Utilities outage notifications

Deliver outage and restoration updates to customers quickly, minimizing downtime and enhancing overall customer satisfaction.

CALL PACING FEATURES

Built for enterprise-scale voice notification

Intelligent call queuing

Automatic pacing based on configurable calls-per-second limits per service.

Queue duration control

Define maximum campaign length such as “complete in four hours” directly via API.

Real-time status visibility

Track in-progress, completed, queued, and failed calls with detailed webhook events.

Campaign management

Stop queued calls in a batch while allowing in-progress calls to complete.

AMD integration

Answering machine detection with beep detection and custom voicemail handling.

TTS support

More than 550 voices across 50+ languages support dynamic personalized message generation.

Time-to-live (TTL)

Set the maximum amount of time the platform will keep attempting to start queued call sessions in a batch.

FAQ

Frequently asked questions

Call pacing automatically controls how fast outbound calls are placed to meet delivery windows, respect CPS limits, and reduce spam risk – without custom throttling logic. 

Sinch supports high-volume outbound voice notifications with CPS controls set in the API call, batch time-to-live (TTL), and real-time queue visibility.

Set a maximum campaign length or batch time-to-live (TTL) settings via API to keep outreach within approved calling windows per time zone. 

Sinch automatically queues and paces calls against your configured CPS limits, preventing carrier overload while maintaining steady delivery. 

To get started, you need a Sinch account in the Sinch Dashboard and access to the programmable Voice API v2 that includes the call pacing feature. Voice API v2 is in closed beta, but you can request access through Sinch. but please reach out to Sinch to request access.

Time-of-day restrictions support TCPA-compliant calling, and intelligent pacing reduces spam flags to help meet regulatory requirements. 

Yes. It integrates with answering machine detection and supports more than 550 AI voices across 50+ languages for dynamic personalized messages. 

Call pacing is a core Voice API V2 capability and is included as part of the standard Sinch Voice API.