Class 5 Softswitch Development
A Class 5 softswitch is a VoIP platform providing retail subscriber services including voice calls, voicemail, conferencing, and auto-provisioning. CelloIP develops FreeSWITCH-based Class 5 platforms with subscriber management, real-time billing, DID allocation, and white-label MVNO/ITSP capabilities.
Class 4 vs Class 5 Softswitch Difference
Class 4 handles wholesale carrier-to-carrier traffic for large volume routing. Class 5 serves retail subscribers with advanced features, subscriber portals, and billing. Class 5 is for ITSPs and MVNOs offering consumer and business voice services.
How long to build a Class 5 softswitch?
A basic Class 5 platform takes 8–12 weeks. A fully-featured platform with billing, reseller portal, and integrations takes 4–6 months.
Class 5 Softswitch
Development Services
Launch your retail VoIP business with a battle-tested subscriber platform. Manage thousands of users, deliver advanced calling features, and monetize with integrated real-time billing — all on scalable open-source infrastructure.
Core Technology Stack
Class 4 vs Class 5 Softswitch
Understanding which platform fits your business model
| Attribute | Class 4 (Wholesale) | Class 5 (Retail) ✦ |
|---|---|---|
| Target Customers | Carriers & large enterprises | Individual consumers & SMBs |
| Call Volume | Billions of minutes/month | Thousands to millions of subscribers |
| Primary Focus | Least-cost routing & peering | Subscriber features & experience |
| Billing Model | Per-minute wholesale rates | Subscription + per-call retail billing |
| Features | Routing, LCR, failover | Voicemail, IVR, conferencing, recording |
| Subscriber Portal | Not required | Full self-service portal |
| DID Management | Carrier-level trunks | Per-subscriber number allocation |
| Typical Platform | Kamailio, OpenSIPS | FreeSWITCH, FusionPBX |
| Margin Profile | Low margin, high volume | Higher margin, feature premium |
| Best For | VoIP carriers, wholesale | ITSPs, MVNOs, VoIP resellers |
What We Build for You
End-to-end Class 5 platform components — all under one roof
FreeSWITCH Core
High-performance media server handling subscriber registration, call routing, and advanced SIP features.
Subscriber Management
Multi-tier user accounts, self-service portal, extension management, and role-based access control.
Real-Time Billing
CDR processing, live rating engine, prepaid/postpaid accounts, invoicing, and Stripe/PayPal integration.
DID Management
Provision, allocate, and route DID numbers. Number portability, virtual numbers, and pooling support.
IVR & Auto-Attendant
Visual IVR builder, multi-level menus, TTS, speech recognition, and time-based call routing rules.
Conference Bridge
Multi-party conferencing with recording, participant management, moderator controls, and call-in codes.
MVNO/ITSP White-Label
Full white-label platform for resellers — custom branding, reseller portal, sub-tenant management.
Analytics & Reporting
Live traffic dashboards, per-subscriber CDR reports, revenue analytics, and fraud detection alerts.
Platform Feature Set
Everything subscribers expect from a modern VoIP platform
Choose Your Platform Model
From startup launch to enterprise-grade MVNO infrastructure
Starter Platform
For new VoIP providers validating their market
Up to 5,000 Subscribers
- FreeSWITCH single-node setup
- Basic subscriber portal
- DID provisioning (1 provider)
- Prepaid billing engine
- Standard IVR & voicemail
- Email & ticket support
Growth Platform
For scaling ITSPs with reseller requirements
Up to 100,000 Subscribers
- HA FreeSWITCH cluster
- Full-featured subscriber portal
- Multi-provider DID management
- Prepaid + postpaid billing
- White-label reseller portal
- Fraud detection engine
- Analytics dashboard
- REST API & webhooks
Enterprise Platform
Full-scale MVNO platform for 1M+ subscribers
Unlimited Subscribers
- Multi-region geo-redundancy
- Custom SLA & uptime guarantee
- Advanced fraud & ML scoring
- Multi-currency + tax engine
- Custom mobile softphone apps
- Number porting automation
- Dedicated DevOps team
- On-premise or hybrid cloud
How We Build Your Platform
A proven delivery process refined across 150+ deployments
Discovery & Architecture
Business requirements, subscriber model design, carrier peering plan, billing structure, and tech stack selection.
Core Infrastructure
FreeSWITCH setup, SIP proxy configuration, database schema, HA architecture, and DevOps pipeline.
Subscriber Platform
Registration, DID provisioning, call routing logic, voicemail, IVR builder, and auto-provisioning engine.
Billing Integration
Rating engine, CDR processing, prepaid/postpaid accounts, invoicing, payment gateway, and fraud rules.
Portals & APIs
Subscriber self-service portal, admin dashboard, reseller portal, REST API, and webhook system.
QA, Carrier Testing & Go-Live
Load testing, carrier interconnect verification, UAT, soft launch to pilot subscribers, and production cutover.
Why Choose CelloIP for Class 5?
Launching a VoIP service business carries real risk — technology must work flawlessly, the business model must attract customers, and operations must stay profitable. CelloIP reduces that risk with 12+ years of proven experience across 150+ live platforms. We've debugged every FreeSWITCH edge case, optimized every billing bottleneck, and scaled every database that couldn't keep up with growth.
Frequently Asked Questions
What is a Class 5 softswitch and who needs one?
A Class 5 softswitch is a platform for providing retail VoIP services to individual subscribers. ITSPs, MVNOs, and companies wanting to launch their own VoIP service under their brand need a Class 5 platform. It handles subscriber registration, call routing, voicemail, IVR, billing, and the self-service portal.
Class 4 vs Class 5 — what's the key difference?
Class 4 is wholesale: large volumes of carrier-to-carrier traffic optimized for least-cost routing. Class 5 is retail: individual subscriber services with advanced features, self-service portals, and per-subscriber billing. Large providers often run both — Class 4 for bulk transit, Class 5 for their retail customers.
Which platform is best for a Class 5 softswitch?
FreeSWITCH is the industry standard for Class 5. It's open-source, highly scalable, feature-rich, and used by major VoIP providers worldwide. We layer real-time billing, subscriber portals, and provisioning on top of FreeSWITCH to create a complete turnkey platform. FusionPBX is used for multi-tenant hosted PBX scenarios.
How long does it take to build and launch a Class 5 platform?
A Starter platform with core subscriber management and basic billing is ready in 8–12 weeks. A Growth-tier platform with white-label reseller portal, multi-provider DIDs, and full analytics takes 14–20 weeks. Enterprise MVNO platforms with custom mobile apps and multi-region HA take 20–30 weeks.
Can you build a white-label reseller platform?
Yes — white-label MVNO/ITSP platforms are one of our specialties. We build multi-tenant architectures where resellers have their own branded portals, sub-tenant management, custom rate cards, and independent billing — all while running on shared infrastructure you manage.
What ongoing support do you provide after launch?
We offer tiered support plans: Basic (business-hours email support), Professional (24/7 with 4hr SLA), and Enterprise (24/7 with 1hr SLA + dedicated engineer). All plans include security patch deployment and quarterly platform reviews.
Related VoIP Services
Ready to Launch Your VoIP Service?
Let's build a Class 5 softswitch platform that scales from your first subscriber to your millionth — reliably and profitably.