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How can I use SMSGatewayCenter’s Voice Call API to automate Bulk Voice and OBD campaigns, and what are the key parameters?

admin
Updated on 16/05/2025

2 min read

SMSGatewayCenter offers a robust Voice Call API to automate Bulk Voice and Outbound Dialing (OBD) campaigns, making it easy to integrate voice messaging into your systems. Here’s how it works and the key parameters:

  • How the Voice Call API Works:
    • The API allows you to send voice messages programmatically, fetch reports, and automate campaigns via your CRM, ERP, or custom app.
    • Supports multiple methods: sending pre-recorded audio, using Text-to-Speech (TTS), or selecting audio from a library.
  • Steps to Use the API:
  • Key Parameters:
    • userId and password: Your SMSGatewayCenter credentials.
    • sendMethod: Set to simpleVoice for basic voice calls.
    • audioType: Choose the audio source:
      • audio: Upload a pre-recorded file (e.g., /path/to/file).
      • t2s: Use Text-to-Speech (e.g., msg=Your OTP is 1234).
      • library: Select from a pre-existing audio library (e.g., libraryId=863713123).
    • mobile: List of recipient numbers (e.g., 99999999xx,9999999xxx).
    • reDial: Number of redial attempts for unanswered calls (e.g., 2).
    • redialInterval: Time between redials in minutes (e.g., 5).
    • format: Response format (e.g., json).
  • Example API Call:
    • To send a TTS voice message:
      https://unify.smsgateway.center/VoiceApi/send?userId=YourUsername&password=YourPassword&sendMethod=simpleVoice&audioType=t2s&msg=Your OTP Code is 1234&msgType=text&mobile=99999999xx,9999999xxx&reDial=2&redialInterval=5&format=json
  • Benefits:
    • Automate voice OTPs, alerts, or promotional messages.
    • Integrate with your systems for seamless communication.
    • Fetch real-time reports to monitor campaign performance.

SMSGatewayCenter’s Voice Call API offers a flexible solution for automating voice campaigns. For assistance, contact our support team.

Updated on 16/05/2025