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Messaging - Overview

Dexatel offers a wide range of messaging and voice-based communication channels to help businesses connect with users across multiple platforms and preferences. Whether you're sending alerts, engaging in conversations, or verifying user identities, our unified API platform supports everything you need to build scalable, multi-channel communication flows.

This page provides a high-level overview of all the supported channels currently available through Dexatel. Each channel serves a different use case and audience, and dedicated documentation pages will be added in the future to dive deeper into technical setup, capabilities, and best practices.

Key Features

  • Unified API for All Channels Integrate once and access multiple messaging and voice channels through a single platform.
  • Global Reach and Reliability Deliver messages and calls worldwide using carrier-grade infrastructure and trusted delivery routes.
  • Built-In Fallback Support Seamlessly configure multi-channel fallback flows (e.g., SMS → Viber → WhatsApp) to increase delivery success rates.
  • Channel-Level Reporting Track delivery metrics and user interactions across each channel in one unified dashboard.
  • Verified Sender Management Apply for and manage branded sender IDs or numbers where applicable.

How It Works

  1. Sign Up: Begin by signing up for Dexatel and obtaining your API key.
  2. Select a Channel: Choose the most appropriate communication channel based on your use case (e.g., promotional, transactional, verification).
  3. Configure Sender Settings: Depending on the channel, configure sender names, numbers, or templates via the Dexatel platform.
  4. Send Your Message or Initiate a Call: Use the Dexatel API to send a message or start a call. The payload and setup vary by channel but follow a consistent structure.
  5. Track Delivery and Interactions: Once the message or call is initiated, you can monitor status, delivery rates, and user interactions through the API or dashboard.

Supported Messaging Channels

  • SMS The most universal and reliable channel for reaching users across all device types and regions. Ideal for transactional alerts, reminders, and one-time codes.
  • Viber Rich messaging channel offering branded sender ID, images, buttons, and fallback-to-SMS support. Suitable for both promotional and service notifications.
  • WhatsApp A globally popular channel for engaging users with branded, end-to-end encrypted messages. Great for user updates, confirmations, and 2FA workflows.
  • Telegram (OTP Only) Lightweight, fast delivery of one-time codes to users on Telegram. This channel is currently supported for OTP-based verification use cases only.
  • Email (OTP Only) Deliver one-time passcodes to a user’s inbox. This channel is designed specifically for verification and identity confirmation flows.
  • Google RCS A modern replacement for SMS that enables branded, interactive messaging. Coverage is currently limited, and setup requires assistance from the Dexatel team.

Supported Voice-Based Channels

  • Voice API Programmatically initiate two-way voice calls using Dexatel’s Voice API. Audio is streamed in real time over WebSocket for full call control and interaction. Currently available in early access for selected customers.
  • Flash Calls A fast and cost-effective verification method where the user receives a missed call, and the last digits of the caller ID are used as the verification code.
  • Text-to-Speech (TTS) An automated voice verification method where a machine reads the OTP code during a live call. Best suited for users who cannot receive SMS or app-based codes.

Benefits

  • Multi-Channel Flexibility Choose the right channel for each use case, user, and region.
  • Improved Delivery Rates Take advantage of built-in fallback logic to reduce message failures and maximize reach.
  • Global Scalability Launch and manage communication flows that work at scale, across countries and use cases.
  • Simple Expansion Easily expand from one channel to another without re-architecting your integration.
  • Centralized Analytics Track all activity—messaging and voice—in one unified interface.

Example Use Cases

  • User Verification Use SMS, Email, Flash Call, TTS, or Telegram to deliver OTPs during account registration or login.
  • Transactional Messaging Send real-time delivery updates, booking confirmations, or account activity alerts via WhatsApp, SMS, or Viber.
  • Marketing Campaigns Launch rich promotional messages using Viber, RCS, or WhatsApp with fallbacks to SMS when needed.
  • Two-Way Conversations Engage users via WhatsApp, Viber, or the Voice API for support, feedback, or onboarding.
  • Omnichannel Workflows Combine multiple channels (e.g., SMS → WhatsApp → Email) to increase delivery rates and optimize the user experience.

Dexatel’s messaging and voice channels are designed to give you complete flexibility and control over how you reach your users. From basic SMS to advanced two-way voice calls, the platform supports a wide range of communication needs—all accessible through a single API.

Have questions or need help choosing the right channel for your use case? Contact our team at [email protected]— we’re happy to assist!

Updated 20 days ago