Building a Custom PBX & Agent Panel with WebRTC, RBAC, and Full Call Control

In today’s world of unified communications, businesses demand flexible, scalable, and secure telephony platforms that go beyond traditional PBX systems. I recently completed aCustom PBX and Agent Panelproject designed to bring enterprise-grade call management, WebRTC integration, and modern APIs together in one powerful solution.

This system was built withFreeSWITCH/Asteriskat its telephony core, aNode.js microservices backend, and aReact.js/Next.js Progressive Web App frontend, delivering a complete end-to-end communication platform.

🔑 Key Features

📞 Core Telephony

• WebRTC Callsfrom the browser (no softphone required)
• Full Call Control– Hold, Transfer, Mute, and Conference
• CDR (Call Detail Records)with detailed call logs
• Dynamic Dial Plan, IVR Menus, Extensions & Feature Codes
• SIP Trunk & Gateway Setupfor carrier integrations

👥 Campaign & Lead Management

• Inbound & Outbound Campaign Managementfor sales, support, and outreach
• Lead Management Systemwith integrated call history & assignment
• Campaign Script Managementso agents always have the right pitch in real time

🔒 User & Access Management

• RBAC (Role-Based Access Control):Dedicated dashboards for Admins, Supervisors, Agents, Customers, and Vendors
• Secure Authentication:JWT-based login with granular permissions

🔗 API-Driven Microservices

• Node.js backendwith modular microservices for scalability
• FreeSWITCH/Asterisk integrationviaCURL/XML APIsfor real-time dialplan updates
• REST APIsfor CRM/ERP integration

🗄️ Data & Analytics

• PostgreSQL databasepowering CDRs, campaign data, and lead tracking
• Real-time campaign dashboardswith agent performance & call outcomes

🎨 Frontend Experience

• React.js + Next.js frontendbuilt as aPWAfor seamless desktop & mobile use
• Campaign dashboardswith live metrics and agent monitoring
• Drag-and-drop IVR and Dial Plan builder

⚙️ Technical Highlights

• Telephony Handling:EitherFreeSWITCHorAsteriskcan be used interchangeably.
• Node.js Microservices:Handle call routing, provisioning, logging, and API endpoints.
• Dynamic Config Updates:Admins can modify dialplans and IVR menus from the web panel, instantly applied via XML/CURL to the telephony engine.
• Security:JWT-based authentication with granular RBAC ensures secure access.

🚀 Why This Matters

Unlike legacy PBX solutions, this custom platform iscloud-ready, API-driven, and browser-native. It empowers businesses with:

• Lower cost of ownership(WebRTC eliminates softphone licensing).
• High scalabilitywith microservices.
• Seamless integrationsinto existing business workflows.
• Future-ready communicationswith IVR, SIP trunking, and custom call flows.

🏆 The Result

The system is not just a PBX — it’s acomplete communication hubwhere businesses can manage their entire telephony infrastructure from a web browser. Withreal-time control, call analytics, and extensible APIs, it is designed to scale with the needs of modern enterprises.

✅Tech Stack Used:

• Backend:Node.js, Microservices, REST APIs
• Frontend:React.js, Next.js, Progressive Web App (PWA)
• Telephony:FreeSWITCH / Asterisk (configurable)
• Database:PostgreSQL
• Security:JWT, RBAC
• Features:WebRTC, CDR, IVR, Extensions, SIP Trunks, Gateways, Feature Codes

🔗 This project showcases how modern frameworks combined with powerful telephony engines can createa next-generation PBX system— bridging the gap between traditional telecom and cloud-native communication platforms.

Originally published on a2cybertech.blogspot.com.