WhatsApp Business Voice

Answer WhatsApp Business calls with AI. Intelligent assistants respond and resolve inquiries 24/7.

Enable voice calls on your WhatsApp Business number using SIP trunking. Customers call your WhatsApp number, and your AI agent answers with natural, conversational voice responses. Handle appointment bookings, order inquiries, support tickets, and more all through WhatsApp voice calls. No traditional phone lines needed. SIP-based architecture scales with your business.

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Key Highlights

What Makes This Feature Special

Discover the powerful capabilities that drive real business results

WhatsApp Voice Calls via SIP Trunking

Connect your WhatsApp Business number to voice calls using SIP protocol. Customers dial your WhatsApp number and reach your AI agent instantly. No phone system required.

Natural AI Voice Conversations

Your AI agent speaks naturally, understands context, and responds in real-time. Customers get human-like conversations on WhatsApp voice calls not robotic menus.

24/7 Call Answering Without Staff

Never miss a customer call again. AI answers every WhatsApp voice call instantly, day or night. Handle after-hours inquiries, weekends, and holidays without overtime pay.

SIP-Based Scalable Architecture

SIP trunking handles hundreds of concurrent calls. Scale your WhatsApp voice channel as your business grows. No hardware, no phone lines, no limits.

How It Works

Get started with this feature in a few simple steps

Everything you need to transform your voice operations from start to finish

WhatsApp Voice SIP Configuration
Step 01

Connect Your WhatsApp Business Number for Voice

Configure your WhatsApp Business number for AI voice calls using SIP trunking. Enter your SIP credentials and connection settings in one form. Once connected, your AI agent answers incoming WhatsApp voice calls instantly, no phone lines or hardware required.

  • SIP credentials and domain configuration
  • Same WhatsApp number for chat and voice
  • No phone lines or hardware needed
  • AI agent answers calls instantly after setup
Endless Possibilities
Scale your voice operations without limits
Benefits

Transform Your Business

Discover the measurable impact and advantages that drive real business growth

WhatsApp Business number supports voice calls via SIP

AI answers calls instantly, no hold times

Natural voice conversations, not IVR menus

24/7 call handling without extra staff

SIP trunking scales to hundreds of concurrent calls

Same number for messaging and voice

Call recording and transcription available

AI captures caller information during conversations

Route complex calls to human agents when needed

Reduce missed calls and improve customer satisfaction

Solutions

Industry Solutions

Discover how this feature powers tailored solutions across industries

AI Marketing & Digital Agency Automation 24/7 Lead Capture & Campaigns

Build a Voice AI agent for your marketing agency. Handle lead capture, campaign management, and client support around the clock.

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AI E-Commerce, Fashion & Subscriptions 24/7 Orders & Support

Build a Voice AI agent for your e-commerce business. Handle orders, customer support, and subscription management around the clock.

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AI Phone System for Restaurants | 24/7 Order Taking & Reservation Booking

Build a Voice AI agent for your restaurant. Handle orders, reservations, and customer inquiries around the clock.

Explore Solution
Customer Success

See How Our Customers Use This

Real businesses getting real results with this feature. Read their stories.

How a UAE Business Advisory Firm Automated Lead Follow-Up with AI Voice Agents

A UAE-based company formation and business advisory firm deployed multiple VoiceInfra AI agents to call social media leads instantly, with Zoho CRM integration triggering calls and updating lead records automatically

Read Success Story

How an AI Automation Consultant in Cairo Replaced Missed Calls with a 24/7 Voice AI Agent

An independent AI automation consultant in Cairo connected a VoiceInfra phone number and deployed an AI voice agent that answers FAQs, qualifies leads, and books consultations

Read Success Story
Technical Excellence

Technical Specifications

Enterprise-grade infrastructure built for reliability and scale

SIP Trunking

Standard SIP protocol for voice routing

Natural Voice AI

Speech recognition + natural responses

Call Recording

Secure recording and transcription

Encrypted Calls

TLS/SRTP secure connections

FAQ

Frequently Asked Questions

Find answers to common questions about this feature

SIP (Session Initiation Protocol) is a standard telephony protocol that routes voice calls over the internet. We connect your WhatsApp Business number to a SIP trunk, which routes incoming calls to your AI agent. Customers dial your WhatsApp number, and the AI answers with natural voice responses.

No. Your existing WhatsApp Business number handles both messaging and voice calls. Customers use the same number to chat or call. You manage everything from one dashboard.

Yes. Your AI agent uses speech recognition and natural language processing to understand what callers say. It responds with clear, human-like voice in real-time. No robotic menus, no 'press 1 for sales', just natural conversation.

The AI can transfer the call to a human agent, schedule a callback, or take a message. You configure the handoff rules. Complex issues, VIP customers, or frustrated callers get routed to your team with full context.

SIP trunking supports hundreds of simultaneous calls. The exact number depends on your SIP provider plan and AI agent capacity. Most businesses start with 10-50 concurrent calls and scale up as needed.

Yes. You can enable call recording and transcription. Recordings are stored securely, and transcripts are available in your dashboard for review, training, and compliance purposes.

No. SIP trunking works over the internet. No phone lines, no PBX hardware, no on-premise equipment. Everything runs in the cloud. You just need your WhatsApp Business number and our SIP configuration.

SIP trunking charges per minute of call usage, similar to traditional phone service but typically 40-60% cheaper. WhatsApp Business API conversation fees may apply. AI platform has separate pricing. Overall cost is lower than hiring receptionists or call center staff.

Yes. If your AI agent is temporarily unavailable or configured to forward after hours, callers can leave a voicemail. You receive the recording and transcription in your dashboard.

Yes. SIP trunking uses encrypted connections (TLS/SRTP). WhatsApp conversations are end-to-end encrypted. Call recordings and transcripts are stored securely with role-based access. Enterprise-grade security for all voice interactions.

Yes. SIP trunking can integrate with existing PBX systems, call centers, and softphones. Route WhatsApp voice calls to your current phone infrastructure, AI, or a combination of both.

SIP trunking configuration typically takes a few hours. You provide your WhatsApp Business number, we configure the SIP connection, test call routing, and you're live. Most businesses are running within the same day.
Platform Features

Continue Exploring VoiceInfra

Discover more ways VoiceInfra can transform your voice AI experience

IVR Detection Auto Navigation

Stop wasting time listening to automated phone menus. With IVR Detection enabled, your agent listens for keypad prompts and presses the right buttons automatically based on your instructions. It navigates complex menu structures on outbound calls to reach live agents or specific departments without manual dialing.

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Batch Calling Campaigns

Create outbound calling campaigns in 3 simple steps. Define your campaign name and caller ID, choose when to start (immediately or scheduled), and add phone numbers manually or via CSV import. CSV uploads support per-call variables like name and company for personalized AI conversations. Maximum 100 numbers per batch.

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24/7 AI Voice Agents

Deploy AI agents that laugh, sigh, and say 'um' at exactly the right moments. Handle 80% of calls instantly, reduce costs by 65%, and capture leads while competitors sleep. One client automated 34% of calls in just two weeks with 200ms response times and perfect accuracy.

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Ready to transform your operations?

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