Class 4 Fusion for VoIP operators

DeNoVoLab

Launch, manage, and grow your VoIP business.

Class 4 Fusion is an all-in-one switch for termination and origination traffic, bringing routing, switching, billing, portals, reporting, and automation into one operating platform.

Community Edition Commercial License

Free 500 ports offer available for live traffic evaluation.

Live Class 4 traffic ONLINE

Routing, billing, monitoring, and fraud controls in one switch workflow.

Routing A-Z and US jurisdiction 99.999%

Billing Rate generation + invoices Auto

Security Fraud block + limits Live

CPS 42k

ASR 63.8

500 Free ports for live traffic evaluation

24/7 Expert support available around the clock

99.999% SLA-oriented switching experience

Why use DNL

Run your VoIP business on one switch, not ten disconnected tools.

DNL Class 4 Fusion brings switching, routing, billing, monitoring, reporting, backup, and operator workflows into one high-performance platform built for real carrier traffic.

Install free with 500 ports Read cookbook

What differentiates us

DNL is positioned as an operator-ready Class 4 business system, not just another switch or billing add-on.

All-in-one operator platform

Switching, routing, billing, monitoring, rate generation, CDR and PCAP backup.

Termination and origination

A-Z, US domestic, and DID/origination workflows in one product.

High-performance switch core

Efficient C and Sofia-SIP foundation for high-volume traffic.

Cloud or self-hosted

RPM/tarball, AWS Marketplace, or Google Cloud Marketplace.

Transparent technical access

Documented database, raw files, logs, reports, and validation.

Compliance and protection

STIR/SHAKEN plus unwanted-call blocking and fraud-control workflows.

Free Community Edition

Install free with 500 ports

Start on your own infrastructure, test real SIP traffic, then scale by port or minute when the business is ready.

01 Choose deploy Server, VM, AWS, or Google Cloud.
02 Install Class 4 Cookbook-guided RPM or cloud flow.
03 Configure traffic Set SIP, routing, billing, and reports.

A true telco-in-a-box solution

Class 4 Fusion integrates the business workflow of a VoIP operator through one platform: routing, switching, billing, client portals, vendor portals, agent portals, and real-time operational control.

Routing

Precision route control

LCR and prefix rules

Trunk groups and failover

Margin-aware control

Switching

High-throughput voice core

High CPS call handling

SIP trunk operations

CAP and channel limits

Billing

Rating and invoicing

Rate decks and invoices

Balance and credit limits

Customer/vendor billing

Client Portal

Customer self-service

Self-service accounts

Invoices and payments

Usage reports

Vendor Portal

Supplier workflow

Supplier rates and CDRs

Vendor invoices

Traffic settlement

Agent Portal

Sales channel access

Agent customer access

Commission workflow

Sales channel reports

Operating system for VoIP traffic

Unique features built for live traffic

Full API integration

Smart API access makes integrating your own applications with Class 4 Fusion simple and stress-free.

Free LERG and LRN

Free LERG and LRN updates are included out of the box, reducing dependence on additional services.

Extremely high performance

Terminate tens of thousands of CPS on a dual-server deployment while preserving operational savings.

Fully automated operations

Automated rate generation, fraud blocking, archive automation, reporting, and invoicing keep routine work moving.

Simple pricing to start free and scale

Install the free Community Edition, then scale by monthly port capacity or minute-based usage when your traffic grows.

Free Community

Start free

$0 forever

Install DNL Class 4 Fusion and evaluate real workflows before buying a license.

500 ports included
Same core feature set
Server, VM, AWS, or Google Cloud

Port License

Scale capacity

$0.50 / mo / port

Add paid port capacity as your customer base and concurrent traffic grow.

Pay by active port
Upgrade beyond Community
Built for live operator traffic

Usage Rate

Traffic economics

$0.0003 / minute

Keep usage pricing transparent for termination and origination traffic models.

Minute-based pricing
Supports termination traffic
Supports origination traffic

Build a successful VoIP business

Empower your VoIP business with smart automation and full flexibility across A-Z traffic, US jurisdiction traffic, and origination traffic.

A-Z traffic

Optimize international termination with flexible routing.

US jurisdiction traffic

Operate US rating and jurisdiction workflow.

Origination traffic

Support DID and inbound origination traffic.

Tell us about your requirements

Support routes include documentation, ticket system, support email, Ask Help, and installation help from DeNoVoLab.

[email protected] +1-484-424-9683 3524 Silverside Road Suite 35B, Wilmington, Delaware 19810

Free Community - 500 ports included

VoIP Traffic without boundaries

Join thousands of telecom operators who've eliminated expensive switching and deployed freely with DeNoVoLab. Start building your VoIP business for free -- no credit card required.

Start building for free Get 500 free ports

Free tools and resources