Voice Calling
Enable WhatsApp Business Voice Calling
Fully managed service to enable WhatsApp Business Voice Calling via Cloud API. We migrate, configure, and activate voice calling for non-technical teams.
What is WhatsApp Business Voice Calling?
Native voice calling functionality integrated directly into WhatsApp Business conversations
User-Initiated Calls
Customers can call your business directly from WhatsApp conversations using secure VoIP technology.
Business-Initiated Calls
Proactively call customers with proper consent using Meta's official Cloud API framework.
Secure & Native
End-to-end encrypted calls within the familiar WhatsApp interface your customers already trust.
Who This Service Is For
SIP integration for Business Calling offers a practical way to connect with 2 billion users globally at reasonable rates
PBX & SBC Operators
Businesses with existing PBX or Session Border Controller infrastructure looking to extend calling capabilities to WhatsApp's 2 billion users.
Telephony System Integrators
Companies operating telephony systems, VoIP platforms, or communication infrastructure who want to add WhatsApp voice calling as a service offering.
Enterprise Communication Teams
Any business looking to connect their existing telephony infrastructure to WhatsApp users for cost-effective global reach and enhanced customer engagement.
Eligibility Requirements
Ensure your business meets these requirements before we begin setup
Cloud API-Hosted Number
Your WhatsApp Business number must be hosted on Meta's Cloud API (not Business App)
Supported Country
Available in Canada, UK, India, Brazil, and select other countries (expanding regularly)
Verified Meta Business Account
Active and verified Meta Business Manager account with proper permissions
Access to WhatsApp Business Manager
Admin access to configure voice calling settings and permissions
SIP Integration Requirements
Technical FAQ for connecting your PBX, SBC, or telephony system to WhatsApp's voice calling infrastructure
What SIP protocol is required for WhatsApp voice integration?
SIP over TLS (Transport Layer Security) is mandatory for all signaling communications. Standard SIP over UDP or TCP is not supported. This ensures encrypted communication between your telephony system and WhatsApp's infrastructure.
How is media encrypted for WhatsApp voice calls?
Media streams must use SRTP (Secure Real-time Transport Protocol) for traditional SIP implementations, or DTLS for WebRTC-based setups. This ensures all audio transmission is encrypted end-to-end.
What audio codec is required for WhatsApp integration?
Opus codec is required for optimal quality and compatibility. Traditional codecs like G.711, G.729, or AMR are not supported for WhatsApp voice calls. Your PBX/SBC must support Opus transcoding.
Are SIP re-INVITEs supported during calls?
No, SIP re-INVITE messages are not supported during active calls. Your telephony setup must handle calls without requiring mid-call modifications, transfers, or codec changes.
Do I need to allowlist WhatsApp IP ranges?
WhatsApp publishes over 1,000 IP ranges for signaling and media traffic. While you may want to allowlist these for optimal performance, the large number can add complexity to firewall configuration. We handle this optimization as part of our setup service.
What's Included in the Service
Complete setup with clear responsibilities for both parties
Setup Step
What We Do
What You Do
1Account Assessment
Review your current setup, verify eligibility, and plan migration strategy
Provide access credentials and current configuration details
2Cloud API Migration
Safely migrate your number to Meta's Cloud API if needed
Grant temporary access permissions during migration
3Voice Calling Setup
Configure voice calling, test functionality, and optimize settings
Test voice calls and confirm functionality works as expected
4Training & Handover
Provide documentation and train your team on voice calling features
Attend training session and confirm understanding of new features
Frequently Asked Questions
Get answers to common questions about WhatsApp Business Voice Calling
Do I need a developer or API experience?
No. Our team handles everything. You'll only need to grant access where required.
Do I need to change my current WhatsApp setup?
Voice calling enhances your existing WhatsApp Business functionality. Your current messaging setup remains unchanged.
Can I still use WhatsApp messaging after this?
Yes — voice calling is an enhancement. Messaging remains fully supported.
Can I call customers proactively?
Yes, with consent. We configure the permission flow and template approval process.
Ready to Enable Voice Calling?
Transform your WhatsApp Business communication with professional voice calling setup. Our experts handle everything while you focus on your business.
24/7Expert Support
