.png){kind=small}
NexGenVoice is a leading softswitch solutions provider offering Class 4 and Class 5 VoIP softswitch systems with billing, LCR routing, fraud protection, and reseller management. Launch and scale your VoIP business with a powerful telecom switching platform.
Enterprise-grade switching infrastructure for modern VoIP businesses
Our softswitch solutions provide carrier-grade VoIP switching with Class 4 and Class 5 capabilities, advanced routing, integrated billing, and scalable telecom infrastructure for VoIP providers and wholesale carriers.
High-performance Class 4 softswitch engineered for wholesale voice transit, carrier interconnection, and international A-Z termination. Processes thousands of concurrent SIP sessions with ultra-low latency signaling, supports SIP/B2BUA call legs, and delivers the calls-per-second throughput that wholesale carriers demand for profitable transit operations.
Full-featured Class 5 softswitch for delivering retail VoIP services directly to end subscribers — residential, SOHO, and enterprise. Includes voicemail, call forwarding, call waiting, caller ID presentation, three-way calling, follow-me, simultaneous ring, and hosted PBX feature sets. Self-care portals let end users manage their own services without contacting support.
Built-in billing module with real-time prepaid rating that debits accounts per-second as calls progress, postpaid invoicing with configurable billing cycles, automatic CDR generation and export, payment gateway integration, and multi-currency support. Rates can be configured per destination, per carrier, per reseller tier, and per time-of-day for maximum pricing flexibility.
Multi-strategy routing engine supporting least-cost routing (LCR), quality-based routing (QBR), percentage-based load balancing, priority-based failover, time-of-day routing, and ASR/ACD-based dynamic routing. Routes are recalculated in real time based on live carrier performance metrics — automatically shifting traffic away from degrading providers before quality impacts your subscribers.
Real-time fraud detection engine with concurrent call limits per account and per IP, destination blacklist and whitelist management, unusual traffic pattern alerting with automatic blocking, rate limiting on rapid successive calls, geographic anomaly detection, SIP authentication enforcement, and IP whitelist ACLs. Fraud events trigger instant NOC alerts and can automatically suspend compromised accounts within seconds.
Comprehensive REST API providing full programmatic access to all softswitch functions — account provisioning, routing configuration, CDR retrieval, real-time call monitoring, and tariff management. Native integrations with PortaBilling, A2Billing, Salesforce, HubSpot, and any system supporting standard API connectivity. Webhook callbacks for real-time event streaming to external systems.
Built-in multi-tier reseller management supporting unlimited hierarchical reseller levels. Each reseller gets independent rate management, margin controls, branded self-care portals, subscriber provisioning rights, and isolated reporting. Resellers can create sub-resellers, set their own retail pricing, and manage their own customer base — all under your administrative oversight with configurable margin enforcement.
Fully rebrandable web-based management portal with your own logo, color scheme, domain, and brand identity. Separate admin, reseller, and end-user interfaces with role-based access controls. End-user self-care portal lets subscribers view call history, check balances, recharge accounts, configure call features, and manage devices — reducing your support ticket volume by up to 60%.
Live network monitoring dashboard showing active calls, CPS throughput, ASR/ACD metrics per carrier and per route, concurrent session counts, server resource utilisation, and SIP signaling diagnostics. Detailed CDR records capture every call attribute — source, destination, duration, rate, cost, carrier used, disconnect reason, and quality scores — exportable via API, CSV, or direct billing system integration.
Getting up and running with NexGenVoice Softswitch Solutions is fast, fully managed, and backed by our telecom engineering team — from initial consultation to commercial traffic launch.
Share your business model, target markets, expected traffic volumes, Class 4/Class 5 requirements, billing preferences, and feature needs. Our solutions architects analyse your requirements and recommend the optimal softswitch configuration for your specific use case.
Our telecom engineers design the complete softswitch architecture — server topology, SIP signaling flow, carrier interconnect plan, routing strategy, billing integration approach, and redundancy configuration. You approve the design before any deployment begins.
Full softswitch deployment including server provisioning, software installation, SIP trunk configuration, routing table population, billing system integration, carrier interconnect testing, security hardening, white-label branding, and reseller portal setup — all handled by our team.
Comprehensive load testing, call quality verification across all routes, failover validation, billing accuracy checks, and a controlled soft launch with live traffic monitoring. We stay alongside you through the go-live phase with dedicated NOC support until your operations are fully stable.
Businesses trust NexGenVoice as a softswitch provider delivering Class 4 and Class 5 VoIP softswitch systems with high performance, advanced routing, billing integration, and 24/7 engineering support.
A softswitch is the foundational infrastructure of any VoIP business — it is the system that routes calls, manages subscribers, applies rates, and generates the billing data that becomes your revenue. With NexGenVoice's turnkey softswitch solution, you can go from concept to live VoIP service in days, not months, with a complete platform that handles every aspect of operations.
Manage every aspect of your VoIP operation from a single web-based control panel — carrier routing tables, pricing tiers, reseller margins, subscriber accounts, feature provisioning, fraud rules, and reporting. No reliance on third-party platforms for core functions. Full visibility and full control over every call that traverses your network.
Our softswitch is built on a clustered architecture that scales horizontally by adding server nodes — not by replacing hardware. Start with a single node handling hundreds of concurrent sessions, then expand to multi-node clusters processing tens of thousands of simultaneous calls as your subscriber base and traffic volumes grow, with zero downtime during scaling.
Every customer-facing interface — the admin portal, reseller dashboard, end-user self-care portal, and branded SIP settings pages — carries your own logo, color scheme, domain name, and brand identity. Your customers and resellers interact exclusively with your brand, with no reference to NexGenVoice anywhere in the user experience.
Our support team consists of experienced VoIP engineers who understand SIP signaling, call routing logic, billing integration, and carrier interconnection — not just helpdesk agents reading from scripts. When you need help with a complex routing issue, a billing discrepancy, or a carrier interconnect problem, you get an engineer who can actually solve it.
NexGenVoice Softswitch integrates directly with the billing platforms, signaling protocols, PBX systems, and carrier networks your business already uses — standard SIP interoperability, leading billing system connectors, and comprehensive API access eliminate vendor lock-in and rip-and-replace migration costs.
Explore what a softswitch is, how Class 4 and Class 5 architectures differ, why softswitch selection is the most critical infrastructure decision a VoIP provider makes, and what separates an enterprise-grade platform from basic switching software.
A softswitch — short for software switch — is the central control element of a modern VoIP network. It performs the same function that traditional telephone exchanges (PSTN switches) performed for circuit-switched voice, but does so entirely in software running on standard server hardware instead of purpose-built telecom equipment.
The softswitch receives incoming SIP signaling from endpoints (IP phones, softphones, SIP trunks, carrier interconnects), determines how to route each call based on configured routing rules and tariff tables, establishes the media path between calling and called parties, monitors call progress, applies billing rates in real time for prepaid accounts, and generates detailed Call Detail Records (CDRs) for postpaid billing and reporting.
Because softswitches run as software on commodity servers, they offer dramatic cost advantages over legacy hardware switches — no expensive proprietary hardware, no vendor lock-in to specific chassis or line cards, and the ability to scale capacity by adding server nodes rather than procuring specialised telecom equipment with long lead times.
Class 4 softswitches operate at the wholesale transit layer of the telecom ecosystem. They route large volumes of calls between carriers — for example, connecting a call from Carrier A's network to Carrier B's network for termination to a specific destination country. Class 4 switching focuses on throughput (calls per second, concurrent sessions), signaling efficiency, least-cost routing across multiple carrier interconnects, and ASR/ACD monitoring to maintain call quality across the transit network.
Class 5 softswitches operate at the retail subscriber layer. They connect end users — residential customers, business PBX extensions, mobile SIP clients — to the VoIP network and provide the feature set that subscribers expect: voicemail, call forwarding, call waiting, caller ID, three-way calling, simultaneous ring, follow-me, and hosted PBX features like auto-attendant, hunt groups, and call queues.
Most successful VoIP businesses deploy both. A Class 4 handles the wholesale transit and carrier relationships (buying and selling minutes), while a Class 5 manages the retail subscriber base and delivers the features that generate recurring monthly revenue per subscriber.
A Class 5 softswitch is the ideal platform for launching a VoIP reseller business because it provides every tool needed to operate as a retail VoIP provider: subscriber account management, device provisioning, feature configuration, billing and invoicing, and customer self-service portals — all from a single integrated system.
The multi-level reseller hierarchy capability is particularly powerful. As the primary provider, you can create reseller accounts at Level 1, who can in turn create their own sub-resellers at Level 2, and so on. Each level sets its own retail pricing, manages its own customer base, and operates its own branded portal — while you maintain margin control and administrative oversight at every level of the hierarchy.
This architecture enables you to build a scalable distribution network where resellers do the customer acquisition work while you provide the infrastructure, carrier relationships, and technical backbone. Each reseller's subscribers appear as retail accounts in your softswitch, with complete billing isolation and independent reporting.
Billing integration is one of the most critical — and most frequently underestimated — aspects of softswitch deployment. The softswitch generates CDRs for every call, but turning those CDRs into accurate invoices, real-time balance deductions, and revenue reports requires a billing system that consumes, rates, and processes those records correctly.
NexGenVoice softswitches support both built-in billing and external billing system integration. The built-in module handles real-time prepaid rating (decrementing account balances per-second during calls), postpaid CDR accumulation with configurable billing cycles, and basic invoice generation — sufficient for many VoIP businesses.
For businesses requiring advanced billing features — complex taxation, dunning management, payment gateway diversity, custom invoice templates, or integration with enterprise ERP systems — we integrate with industry-leading platforms including PortaBilling (the most widely deployed VoIP billing platform globally), A2Billing (open-source with extensive community support), Billing Soft, and any standards-compliant billing system via CDR export API or real-time rating API.
VoIP fraud is one of the most significant financial risks facing softswitch operators. Common attack vectors include SIP credential brute-forcing (guessing weak passwords on subscriber accounts), toll fraud through compromised extensions (dialing premium-rate destinations at the account holder's expense), PRI manipulation, and SIP scanner reconnaissance that maps your network before launching targeted attacks.
NexGenVoice's softswitch includes multiple integrated fraud prevention layers. Concurrent call limits prevent a single compromised account from generating excessive traffic. Destination-based rules block calls to known premium-rate fraud destinations. Rate limiting detects and blocks the rapid-call patterns characteristic of automated dialing attacks. Geographic anomaly detection flags calls to unusual destinations for a given account's calling history. IP whitelisting ensures only authorised SIP endpoints can register.
Critically, these protections operate in real time at the switching layer — not in post-call analysis. Fraudulent traffic is blocked within seconds of detection, before significant financial damage accumulates. Combined with 24/7 NOC monitoring, this approach provides the layered defence that production VoIP networks require.
Choosing a softswitch solutions provider requires evaluating scalability, routing capabilities, billing integration, VoIP quality, and fraud protection. NexGenVoice delivers enterprise softswitch systems with reliable performance, flexible architecture, and expert VoIP engineering support.
Key evaluation criteria include: SIP protocol compliance and interoperability with carriers worldwide, Class 4 and Class 5 capability in a single platform or seamless integration between separate platforms, billing system flexibility (built-in plus external integration), routing engine sophistication (LCR, QBR, failover, dynamic routing based on live quality metrics), scalability architecture (horizontal clustering vs vertical scaling limits), security and fraud prevention depth, white-label completeness, API comprehensiveness, and — critically — the quality and responsiveness of the provider's engineering support team.
NexGenVoice differentiates by providing not just software, but a complete managed softswitch service: architecture design, installation, configuration, carrier interconnect setup, billing integration, security hardening, load testing, go-live support, and ongoing 24/7 NOC engineering — staffed by VoIP engineers, not generalist IT support. This full-service approach eliminates the implementation risk that plagues self-hosted softswitch deployments and ensures your platform is production-ready from day one.
Get a complete, production-ready softswitch solution from NexGenVoice and build the foundation of a profitable VoIP, wholesale transit, or telecom reseller business — with full engineering support from day one.
Everything you need to know about NexGenVoice Softswitch Solutions — from Class 4/Class 5 architecture and billing integration to fraud protection, scalability, and deployment timelines.
A softswitch (software switch) is the central piece of a VoIP network that handles call routing, signaling, billing, and management. Unlike traditional hardware switches, softswitches run on standard servers and can be scaled with software configuration. They serve as the intelligent core that connects incoming and outgoing VoIP calls, applies routing logic based on tariff tables and quality metrics, enforces business rules like concurrent call limits and fraud protections, and records detailed call data for billing purposes. Every VoIP provider — from small resellers to international carriers — relies on a softswitch as the foundation of their voice network.
Class 4 softswitches handle carrier-to-carrier voice transit — routing large volumes of calls between telecom operators across national and international networks. They focus on throughput (high CPS capacity, thousands of concurrent sessions), signaling efficiency, least-cost routing across multiple carrier interconnects, and quality monitoring via ASR/ACD metrics. Class 5 softswitches serve end users directly with retail features like voicemail, call forwarding, call waiting, caller ID, three-way calling, and hosted PBX services. Many VoIP businesses deploy both: a Class 4 for wholesale transit operations and carrier relationships, and a Class 5 for retail subscriber management and feature delivery.
Absolutely. A Class 5 softswitch is the ideal foundation for launching a VoIP reseller business. It provides all the tools needed to provision end customers, manage prepaid and postpaid accounts, handle billing and invoicing, configure retail features (voicemail, call forwarding, etc.), and deliver professional VoIP services under your own brand. Our softswitch supports multi-level reseller hierarchies where each reseller operates independently with their own pricing, customer base, and branded portal — while you maintain margin control and administrative oversight at every level of the hierarchy.
Yes. Our telecom engineers handle the complete installation, configuration, and testing of your softswitch environment. This includes server provisioning, software installation, SIP signaling configuration, routing table setup with your carrier interconnects, billing system integration, security hardening (firewall rules, IP whitelisting, fraud rule configuration), white-label branding of all portals, reseller hierarchy setup, and comprehensive load testing. We also provide training on system administration and ongoing 24/7 technical support staffed by experienced VoIP engineers.
We work with leading VoIP billing platforms including PortaBilling (the most widely deployed commercial VoIP billing system globally), A2Billing (open-source with extensive community support), Billing Soft, and custom integrations via REST API. Our softswitch generates detailed CDRs that any standards-compliant billing system can consume. For businesses that prefer an all-in-one approach, our built-in billing module handles real-time prepaid rating, postpaid invoicing, payment gateway integration, and multi-currency support — sufficient for many VoIP businesses without requiring a separate billing platform.
NexGenVoice softswitch solutions are architected for horizontal scalability. A single node typically handles thousands of concurrent SIP sessions depending on server specifications (CPU cores, RAM, network interfaces). Multi-node clustered deployments can scale to tens of thousands or hundreds of thousands of concurrent calls by adding additional server nodes to the cluster — with automatic session distribution and failover between nodes. Our engineering team designs the optimal cluster topology based on your projected traffic volumes and growth trajectory, ensuring you have headroom without over-provisioning hardware.
Yes. Our softswitch includes multiple layers of real-time fraud protection that operate at the switching layer — not in post-call analysis. Protection mechanisms include concurrent call limits per account and per IP address, destination blacklist and whitelist management, rate limiting that detects and blocks rapid successive call patterns characteristic of automated attacks, geographic anomaly detection that flags unusual destination patterns for specific accounts, SIP authentication enforcement with configurable password complexity requirements, IP whitelisting for endpoint registration, and integration with external fraud management systems. Fraud events trigger instant NOC alerts and can automatically suspend compromised accounts within seconds of detection.
Standard softswitch deployments are completed within 5 to 10 business days from requirement sign-off, depending on complexity. A straightforward Class 5 deployment with built-in billing and a single carrier interconnect can be operational within a week. More complex deployments involving Class 4 + Class 5 integration, multiple carrier interconnects, external billing system integration, multi-level reseller hierarchy setup, and extensive custom configuration typically require 7 to 14 business days. We provide a detailed project timeline during the architecture planning phase so you know exactly what to expect.
Your request has been received successfully.