Carrier-Grade Network — Our own infrastructure

The communication infrastructure
behind those who connect Brazil.

Voice, messaging, and customer engagement — telephony, SIP Trunk, SBC, CRM and omnichannel — all on a single, fully owned network built for carriers, ISPs, integrators and enterprises.

99.99% SLA — mission-critical grade
True white-label — your brand, not ours
24×7 Portuguese-speaking support
Anatel-compliant since day one

Who We Serve

Four profiles, one shared infrastructure.

I'm a Carrier

Expand your voice and interconnection portfolio without the capital cost of additional infrastructure. Lease certified routes, national numbering and SBC capacity directly from our own network — and go to market faster than your competitors.

Solutions for carriers

I'm an Internet Provider (ISP)

Turn your existing subscriber base into a recurring voice revenue stream. Deploy white-label Virtual PABX and SIP Trunk under your own brand, with zero hardware investment. Activation in days, not months — billed per active extension.

Solutions for ISPs

I'm a PABX Integrator

Build a complete, fully branded communication portfolio to resell — Softphone, Virtual PABX, Verified Calling (STIR/SHAKEN), SIP Trunk and Omnichannel — all provisioned through a single partner dashboard and your own domain.

Solutions for integrators

I'm an Enterprise

Consolidate voice, customer engagement and operational data into a single, carrier-grade platform. Whether you run an in-house contact centre or a distributed workforce, Flux delivers the reliability and flexibility your operation demands.

Solutions for enterprises
Flux team in operations centre
+10 years of connectivity

Who We Are

Connecting people and ideas for more than a decade.

Flux was founded to solve a concrete problem in the Brazilian telecom market: carriers, ISPs and PABX integrators needed robust, scalable communication infrastructure — but few had the resources to build it themselves. We became that infrastructure.

Today, every service we offer — interconnection, national numbering, SIP Trunk, Session Border Controllers, white-label CRM and omnichannel messaging — is delivered as a fully managed platform. Our partners build services under their own brand; Flux powers everything underneath.

Our story & mission

The Platform

A complete communication ecosystem.

From network interconnection to omnichannel customer engagement — every layer of corporate communication, unified in a single partnership.

Voice & Network Infrastructure

The technical foundation of any communication operation: interconnection, numbering, voice routing, SBC and SIP Trunk — all on our own network.

Interconnection Numbering SBC SIP Trunk 0800 400X 0303
White-Label Communication

Softphone, Virtual PABX and Verified Calling — production-ready products that operate entirely under your brand and domain, visible to your end customer.

Softphone WL Virtual PABX STIR/SHAKEN
Customer Engagement

Multi-tenant white-label CRM and omnichannel hub that centralises the entire end-customer journey — from first contact to resolution — on a single console.

CRM White Label Omnichannel Corporate SMS
Technology & Integration

A fully documented communication API for product and engineering teams — embed voice calls, SMS, WhatsApp and verification flows into any existing system or application.

REST API Webhooks SDK
+10 yrs
Connecting carriers, ISPs and enterprises across Brazil
Thousands
End-customers served through our partner network
Millions
Minutes and messages transited through our network every day
National
Interconnection and numbering coverage across the country

Our Approach vs. The Usual

Most carriers and ISPs still treat telecom as unnecessarily complex. It doesn't have to be.

Your operation doesn't need physical PABX equipment, rigid multi-year contracts or weeks of painful integration. It needs a cloud platform that activates voice, messaging and data with carrier-grade security and a 99.99% SLA.

The conventional way
Legacy infrastructure Physical PABX hardware, dedicated leased lines and fragile point-to-point integrations that generate high operational cost and unexpected downtime.
Weeks of activation Onboarding a new customer or a remote POP takes days of manual configuration, back-and-forth tickets, and physical hardware delivery.
Fragmented communication Voice, SMS, WhatsApp, email and API functions live in separate, disconnected tools — impossible to audit, difficult to scale, expensive to maintain.
No real-time visibility Operational dashboards are either absent or require third-party tools to aggregate call quality, route health and billing data.
The Flux way
Cloud-native, no hardware Every service runs on our own fully redundant cloud infrastructure. No racks, no physical links — just a console and an API.
Activation in days, not months Provision a SIP trunk, assign DID numbers and configure routing rules via API — in minutes. New customers go live the same week they sign up.
Unified communication platform Voice, corporate SMS, omnichannel messaging and the full CRM stack operate together on a single platform — one login, one SLA, one bill.
Full observability, always on Live call-quality metrics, route health monitoring and billing dashboards built directly into the console — no third-party tools required.

How It Works

Activate services, orchestrate routes, monitor in real time.

Flux keeps your operation in full control. Provision your SIP trunk, configure routing rules, and track every call as it happens — from the same console your end customers never see.

Step 01

Provision the trunk

Activate SIP trunks and extensions within minutes. Authentication is handled securely — digest or IP-based — and every trunk can be provisioned programmatically through the REST API, making mass onboarding effortless.

"Our first enterprise customer was live on SIP trunk within 48 hours of signing the partner agreement."
Step 02

Configure routing

Define routing rules by time of day, origin prefix, destination range and priority — all through a visual rule builder. Failover routes, geographic priorities and least-cost routing are applied in real time without a maintenance window.

"Schedule-based routing cut our overflow costs by a third in the first quarter."
Step 03

Monitor in real time

Every active call, route health indicator and quality metric is visible in a live dashboard. Alerts fire automatically on anomalies. Full CDR export and billing reconciliation are available at any granularity — per trunk, per extension, per customer.

"Total observability from day one — no surprises on the monthly invoice."
Flux founding team

A Note from the Founders

We built Flux because we were tired of watching great telecoms companies lose deals simply because the underlying infrastructure wasn't accessible to them.

Over a decade ago, we saw first-hand how ISPs and regional carriers were forced to rely on intermediaries for every trunk, every number range, every SBC session — paying margins they couldn't afford, waiting weeks they didn't have, and carrying the reputational risk of someone else's uptime. We decided to build the layer they were missing: a carrier-grade network that any qualified partner could access directly, white-label, and make their own.

That conviction still drives every decision we make today — from the architecture of our network to the SLA we commit to in every contract. When your end customer calls, they should never know Flux exists. That anonymity is our greatest achievement.

Flux Founding Team
Flux Tecnologia e Serviços Ltda
Part of a larger ecosystem — standards & integrations
Anatel
Regulatory compliance
Softswitch / SBC
Certified manufacturers
STIR / SHAKEN
Verified calling standard
CRM / ERP
Native integrations
Payment Gateways
Billing & reconciliation
REST API
Full documentation

Recent Insights

Thinking about the future of telecom infrastructure.

All articles
SIP Trunk deployment
Voice Infrastructure

Why ISPs are leaving voice revenue on the table — and how to fix it in 30 days

Most regional internet providers already own the customer relationship and the last-mile link. Adding branded voice services requires no additional hardware — only the right wholesale partner and a well-structured SIP trunk.

May 2025 · 6 min read
Omnichannel platform dashboard
Omnichannel

The hidden cost of fragmented communication: voice, SMS and WhatsApp in separate silos

When each channel has its own vendor, its own contract and its own quality metrics, customer experience suffers and operations teams spend more time firefighting than serving. A unified stack changes the equation entirely.

April 2025 · 8 min read
Network operations
Regulatory

STIR/SHAKEN in Brazil: what carriers and integrators need to know before the mandate lands

Verified Calling is no longer a premium feature — it is fast becoming a baseline expectation for enterprise customers and a likely regulatory requirement. Here is what the framework means in practice for your operation.

March 2025 · 5 min read

Everything your telecom needs.
Without the usual complexity.

Activation in days, not months. A fully owned network, no intermediaries. White-label from day one. Speak with a Flux specialist and see how quickly your operation can go live.

Prefer email? Reach us directly at contato@flux-us.site