WhatsApp Business Calling API dengan PBX

As WhatsApp continues to become one of the primary communication channels for customers, businesses need a solution that can integrate WhatsApp calls directly into their internal phone systems.

SolusiPBX, as a cloud-based PBX provider, offers WhatsApp Business Calling API integration through Meta Cloud, directly connected to the 3CX PBX system. This integration enables businesses to manage customer communications in a more centralized, efficient, and professional manner through a single unified platform.

whatsapp business calling api

Through the integration of the WhatsApp Business Calling API with 3CX PBX, businesses can receive and make WhatsApp calls just like regular phone calls — directly to extensions, IVR, ring groups, or call center queues.

This allows WhatsApp to become part of the company’s telephony infrastructure without requiring any changes to the existing PBX system.

What Is WhatsApp Business Calling API?

WhatsApp, through Meta, provides the WhatsApp Business Platform with API-based voice call integration capabilities.

With the WhatsApp Business Calling API, customers can:

  • Make calls directly from the WhatsApp application

  • Contact customer service without using a PSTN phone number

  • Connect to SIP-based call center systems

These calls can then be forwarded to systems such as 3CX using the SIP protocol.

How Does WhatsApp Calling Integration with 3CX Work?

The integration of the WhatsApp Business Calling API with 3CX works by using WhatsApp as the call origination source, which is then converted into a SIP call.

The general integration flow is:

  1. The customer makes a call through WhatsApp

  2. The call event is received through a Webhook

  3. RTP media and signaling are processed by the SIP Gateway

  4. The Gateway forwards an INVITE to 3CX

  5. 3CX receives the call as a SIP trunk

  6. The call is routed to:

    • Extension

    • Ring Group

    • Call Queue

    • IVR

    • Digital Receptionist

With this method, WhatsApp Calling appears as an inbound call on the 3CX Web Client or the agent’s IP Phone.

Benefits of Integrating WhatsApp Calling with 3CX

1. Integrated with 3CX Call Queues

WhatsApp calls can be routed directly to:

using the native queue features of 3CX.

2. Call Recording & Monitoring

All WhatsApp calls can be:

  • Automatically recorded

  • Monitored by supervisors

  • Included in 3CX Call Reporting

  • Analyzed to evaluate agent performance

3. IVR (Digital Receptionist)

WhatsApp calls can be routed through an IVR system, just like regular phone calls:

Press 1 for Sales
Press 2 for Support
Press 3 for Billing

The system can also be integrated directly with an AI Agent to provide a more modern customer experience.

4. Remote Agent Support

Agents can receive WhatsApp calls through:

  • 3CX Web Client

  • 3CX Desktop App

  • SIP Softphone

  • IP Phone

  • Smartphone

without requiring the agents to use the WhatsApp Business application.

5. Unified Communication Platform

With this integration, 3CX can handle:

  • WhatsApp Voice Calls

  • PSTN Calls

  • SIP Trunks

  • Internal Extension Calls

within a single centralized platform.

Use Case Examples

The integration of the WhatsApp Business Calling API with 3CX is suitable for:

  • Hotels & Hospitality

  • Clinics & Hospitals

  • Logistics & Delivery

  • E-Commerce

  • Customer Support Centers

Customers simply click the “Call” button on WhatsApp and are directly connected to an agent through the company’s 3CX system.

WhatsApp to 3CX Integration Architecture

The general integration architecture is:

WhatsApp User → WhatsApp Business Platform → API/Webhook Server → SIP Gateway → 3CX PBX → Agent

The implementation requires:

  • Linux Server

  • Public IP Address

  • SSL Certificate

  • 3CX Version 18/20

  • WhatsApp Business API Account

  • SIP Gateway Integration

Business Benefits

By integrating WhatsApp Calling with 3CX, businesses can:

  • Reduce reliance on PSTN

  • Simplify customer communications

  • Reduce telephone costs

  • Improve customer service responsiveness

  • Consolidate voice communications into a single dashboard

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