A complete end-to-end solution for ISPs and WISPs — Gbps-capable LTE/5G broadband delivered to homes and businesses, with built-in subscriber management. The cellular infrastructure is embedded and invisible.
Register Your InterestThe FWA Platform is built for broadband operators who demand the superior qualities of LTE/5G — reliability, security, and spectral efficiency — without becoming experts in mobile networking. The mobile core is embedded and managed automatically. Your team sees the two device types that matter to a WISP: base stations (your towers and sectors) and CPEs (your subscribers' premises equipment).
A single platform to deploy, monitor, and manage your entire LTE/5G access network — with all the reliability, spectral efficiency, interference protection, and Gbps throughput that licensed cellular implies. The NMS gives your operations team a single place to deploy, monitor, manage, and troubleshoot the entire network: from the moment a base station comes online to the moment a subscriber calls about their connection.
Everything ships as a single all-in-one appliance with the LTE/5G stack on board — mount it, provision your CPEs, start delivering service.
A deliberate inversion of the 3GPP model. The 3GPP standard envisions the mobile core as the operator's actual core network. We flip that paradigm: the mobile core is embedded and invisible, and 4G/5G is used purely as an access technology — a better last mile. Your existing core network stays exactly where it is.
The SendBuffer radio hardware — CPE at the subscriber's premises and base station on your tower — operates as a transparent Layer 2 bridge. Your existing access infrastructure plugs straight in, as it would with any other last-mile technology. Nothing in your core network needs to change.
Your operations team keeps their tools. Subscribers keep their experience unchanged. The only thing that changes is the last mile: now LTE/5G instead of copper or fiber.
CPE onboarding, SIM binding, and service activation — all from a single interface.
See your entire network at a glance — every base station, every sector, every CPE attached to it, with signal quality, throughput, and uptime. When something breaks, you know exactly what is down and which subscribers are affected before they call you. Drill into any device for diagnostics without SSH or a separate management tool.
Onboard a new subscriber, assign a CPE, apply a service plan — done in minutes. Suspend for non-payment with one click. Reactivate instantly. Change plans without touching the CPE. Every action is logged. No CLI, no database editing, no carrier toolchain required.
Automatic notifications when a base station or CPE goes offline, signal quality degrades, or usage thresholds are hit. Email and webhook delivery. Per-device event history and signal statistics available directly from the NMS — no third-party monitoring stack required to know what is happening on your network.
The NMS is hosted by SendBuffer — no servers to set up, no infrastructure to maintain, always up to date. Access it from anywhere with a browser. Need an on-premises NMS instead? Get in touch — we offer it on request.
Base stations and CPEs connect directly to the SendBuffer NMS — provisioned, monitored, and managed from a single interface without any separate radio management system.
Antenna, radio, and baseband in a single weatherproof unit delivering Gbps sector throughput. Mount on pole or rooftop, connect PoE backhaul, and it is on air. Presents a standard Layer 2 Ethernet interface — your aggregation equipment connects directly, no cellular knowledge required. Appears in the NMS with its connected CPEs and per-sector traffic.
The FWA Platform works with any standard 4G or 5G CPE — if it speaks the protocol, it connects. However, for a fully integrated end-to-end experience, we offer our own recommended CPE, managed directly by the SendBuffer NMS with zero manual configuration.
Onboarded directly into the NMS: the operator assigns a subscriber, a bandwidth plan, and an IP. From that point, the CPE is monitored, controlled, and accountable through the same interface as everything else.
The outdoor CPE is roof-mounted for line-of-sight performance. The CPE and base station together act as a transparent Layer 2 bridge. On the network side, subscriber traffic is carried back to the operator's BRAS over the existing MPLS or VPN backhaul — no changes to the core infrastructure required.
The SendBuffer FWA Platform is purpose-built for CBRS (Citizens Broadband Radio Service) deployments in the United States. CBRS opens the N48 band — 3550 to 3700 MHz — to WISPs, ISPs, utilities, and municipalities, allowing them to operate private LTE/5G networks without traditional carrier licensing. Spectrum is managed dynamically by a Spectrum Access System (SAS), which coordinates access in real time across three tiers: incumbents, Priority Access Licensees (PAL), and General Authorized Access (GAA) users.
Our platform integrates natively with FCC-certified SAS administrators, handling CBRS domain proxy requirements, automated frequency grants, and SAS heartbeat signaling transparently in the background. Your operations team manages subscribers and bandwidth plans; the platform handles spectrum compliance automatically.
The result: fiber-class broadband speeds over a lightly licensed, interference-protected band — deployed in weeks, not years, and eligible for BEAD and other federal rural broadband funding programs.
When you build broadband infrastructure for your community, your customers, or your country, the software running it matters. Not just technically — politically and strategically. SendBuffer is entirely designed and built in Europe, by a team with deep roots in the Western telecom industry. No foreign government has a claim on our code, our company, or our roadmap.
Every layer of the stack — from SndbufOS at the base to the mobile core to the NMS — is developed and auditable by a team you can meet, question, and hold accountable. We publish a full software bill of materials. No black-box components, no opaque dependencies.
In a market where critical infrastructure software increasingly comes from vendors whose loyalties are opaque, that is not a small thing. It is the foundation everything else is built on.
Established fixed wireless vendors lock customers into proprietary hardware ecosystems — custom silicon, closed radio stacks, CPE that only works with their base stations. When you buy into the platform, you buy into their pricing, forever. Upgrading means buying from the same vendor, at the same margins, on their timeline.
The FWA Platform is built on 3GPP-standardized 4G/5G — the same technology that runs every major mobile network on the planet. That matters for cost: a global industry of chipmakers, device manufacturers, and infrastructure vendors all compete on the same open standard. You benefit from that scale. Proprietary fixed wireless platforms sit outside this ecosystem entirely, which is exactly why they cost more.
SendBuffer uses a simple, operator-friendly licensing model — no surprises, no vendor lock-in.
Your license never expires. Pay once and run SendBuffer for as long as you need — on your hardware, air-gapped from everything including us. No subscription that can be pulled, no renewal that takes your network down.
One payment. Yours to keep.
A small annual fee covers all software updates for the year — new features, security patches, and compatibility improvements. Skip a year and your current version keeps running. If you want to resume updates after a lapse, a new license at full price is required.
Stay current for a fraction of the initial cost.
No usage metering. No per-subscriber fees. No hidden costs tied to how many CPEs connect to your network.
The SendBuffer FWA Platform is in active development and will be available soon. Leave your details and we'll reach out directly when it's ready — or sooner, if you want to talk architecture.
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