A Two-Part Series by Stephen Leotis, CEO, Moso Networks

Every enterprise building needs two things: carrier coverage for the people inside and a private 5G network for the operations of the business. For most of the market, neither has been easy to get. That changes now.

Part 1 makes the case for the off-air path — how FCC Part 20 systems bring all three US carriers indoors without a carrier agreement, deployed in days, and how CBRS private 5G injection adds the operational layer on the same infrastructure.

Part 2 covers the DAS path for buildings where off-air isn’t sufficient — and why the two-layer result is identical regardless of signal source.

The Short Version

• Removing the signal source bottleneck for in-building carrier coverage. 4G MOCN has not scaled and carrier support has waned. While Moso has been working on 5G MOCN with key industry partners, there are no certification programs and no timeline from the carriers. If carriers align unanimously around a 5G MOCN framework, that changes — and Moso will be ready. Until then, the path runs through licensed spectrum. Off-air and managed signal-source solutions, getting licensed carrier signals into a building without direct carrier dependency.
• Off-air is the fastest path to three-carrier coverage. FCC Part 20 systems capture AT&T, Verizon, and T-Mobile signal from outside and distribute it throughout the building. No carrier agreement, no approval process, operational in days. The right answer for a large share of the enterprise market.
• When the building requires more, DAS delivers. High-rises, dense construction, large campuses, environments requiring guaranteed carrier-grade performance — the DAS path covered in Part 2 delivers the same two-layer result at any scale and in any signal environment.
• The FCC cleared the path to enterprise-owned private 5G on the same infrastructure. CBRS private 5G can now be injected into both architectures as an additional signal source alongside licensed carrier signals. One antenna system. Carrier coverage for people. Private 5G for operations. Enterprise-owned and enterprise-managed.

The Enterprise Market Has Been Waiting.

Airports have great in-building coverage. Stadiums have great in-building coverage. The largest venues in the country have had carrier-grade cellular for two decades. Carriers prioritized in-building investment where the ROI was public and scalable.

The rest of the enterprise market — warehouses, medical offices, manufacturing floors, regional campuses, mid-size commercial buildings — has been an afterthought.

The result is predictable: dropped calls in conference rooms, dead zones on production floors, visitors who can’t connect. These are solvable problems that simply haven’t been solved at scale.

The bottleneck has always been two things working against each other: the signal source and the cost structure. Getting licensed carrier signals inside a building without a direct carrier relationship — and doing it at a cost that makes sense for a mid-market building — has been the unsolved problem for most enterprises. Carrier-supplied base stations bypass the signal source constraint entirely by connecting directly to carrier networks, but access is tightly controlled and increasingly reserved for the largest venues, and the economics follow the same logic: dedicated fiber, carrier-owned equipment, and deployment timelines that assume a major venue budget. For the enterprise mid-market, that combination — waiting on carriers for access while absorbing major venue cost structures — has never been a viable strategy.

One notable attempt at a different bypass: MOCN frameworks routed multiple carriers through shared CBRS spectrum, eliminating licensed signal source requirements. Today, CBRS-based MOCN is stuck at 4G without clear support from the three major US carriers. The track record is clear — 4G MOCN has not scaled, T-Mobile directed neutral host partners away from CBRS in August 2025, and no US carrier has announced a 5G MOCN certification program. If all three US carriers align around a unified 5G MOCN framework, it could change the neutral host landscape materially. Moso is engaged with partners and carriers on that path, and we’ll be ready if it materializes. But today, an enterprise in-building strategy cannot wait for a certification program that does not exist. The answer available now runs through licensed spectrum.

Off-air and managed signal-source solutions exist precisely to break these dependencies. They are now the practical standard for enterprise in-building deployments — and the three paths they represent are all available today.

Off-Air: The Signal Is Already There. Here’s How We Bring It Inside.

FCC Part 20 compliant off-air systems operate on a straightforward principle: AT&T, Verizon, and T-Mobile are already broadcasting licensed signal outside the building. An off-air system captures those signals, amplifies them, and distributes them throughout the facility via DAS or Ethernet infrastructure. No new spectrum. No carrier agreements. No approval process.

The business case follows directly. Off-air deploys in days rather than months, requires no carrier coordination or dedicated fiber, and supports all three major US carriers from day one. For enterprises that have spent years waiting on carrier action — or paying for consultants to navigate carrier bureaucracy — off-air eliminates that problem at a fraction of the cost and a fraction of the timeline.

The in-building experience is indistinguishable from standing outside. Same devices, same plans, no new SIMs, no new apps. Off-air is not a workaround — it is FCC-certified, carrier-compatible infrastructure operating on licensed spectrum, doing exactly what it is designed to do.

Where Off-Air Delivers — and Where It Has Limits

Where Off-Air Works Best

Off-air performs best in buildings with strong, consistent outdoor macro signal — typically two to five stories, moderate construction density, in suburban or mixed-use environments with solid tower coverage nearby. Mid-size office buildings, light industrial warehouses, retail centers, medical office buildings, campus facilities, and logistics hubs in well-covered areas are well-suited for this path. These buildings represent a large share of the enterprise market. For many of them, off-air is the correct answer, and they could have had coverage weeks ago.

Where Off-Air Has Limits

Off-air has one honest requirement: outdoor signal must be strong enough to capture and amplify reliably. Dense urban buildings surrounded by taller structures, rural facilities with limited tower coverage, thick reinforced concrete construction, significant RF shielding, and large floorplates far from the building envelope can all compromise performance. High-rise towers, large multi-floor industrial facilities, healthcare environments with electromagnetic interference requirements, and buildings where guaranteed carrier-grade performance is contractually required will often need the DAS path instead.

This is not a limitation to work around — it is the decision framework. Where outdoor signal is adequate, off-air delivers faster and at lower cost than any other path. Where it isn’t, the DAS architecture in Part 2 is the right answer. The worst outcome is deploying off-air in a building that needs DAS — or waiting for DAS in a building that could have had coverage in weeks.

The Second Layer: Enterprise-Owned Private 5G on the Same Infrastructure

Carrier coverage solves people connectivity. But enterprises running operational technology have a second requirement that licensed carrier signals don’t address. IoT sensors on manufacturing equipment, real-time safety systems on warehouse floors, autonomous equipment guidance, machine control signals — these workloads need a network that belongs to the enterprise, not one shared with employee smartphones and visitor traffic. Until recently, that meant separate infrastructure, separate radios, and separate management overhead.

The FCC has changed that equation. Updated rules now permit CBRS private 5G to be injected into a DAS system — including off-air systems — as an additional signal source running alongside licensed carrier signals. The same infrastructure distributing AT&T, Verizon, and T-Mobile coverage simultaneously distributes a dedicated private 5G network in CBRS Band n48 that belongs entirely to the enterprise.

This is not a second system. It is a second layer on the first one. One antenna infrastructure. Two network layers. Carrier coverage for people. Private 5G for operations. Separate spectrum. Zero carrier involvement on the operational side.

The Two-Layer Architecture: One Infrastructure, Two Networks

Layer one — people connectivity — is carrier cellular coverage via an off-air system. All three major US carriers, no agreements, operational in days. Employees and visitors connect on their own phones and plans. The experience is indistinguishable from outdoor cellular — because it is outdoor cellular, brought inside.

Layer two — operational connectivity — is CBRS private 5G injected into the DAS as an additional signal source, running alongside licensed carrier signals on the same antenna infrastructure. Enterprise-owned, enterprise-managed, no carrier involvement, no shared congestion with consumer traffic. What makes this architecture genuinely complete is what happens at the building perimeter: the same private 5G network that covers the indoor environment extends seamlessly outdoors through small cells mounted on the exterior — loading docks, parking structures, yard areas, adjacent facilities. A device moves from the warehouse floor to the receiving dock to the parking lot and stays on the same private network the entire time, without handoff interruption, without switching systems. One network. One management plane. Indoor and outdoor covered as a single continuous environment.

This architecture is deployable today for buildings where outdoor signal supports off-air. And this is 5G — not 4G. The operational applications enterprises are deploying now are already beyond what 4G can support. Infrastructure purchased today should not need replacing before it pays for itself.

How Moso Delivers the Off-Air Architecture

Moso’s role is Layer two. For the off-air path, we partner with leading FCC Part 20 providers whose systems support CBRS injection alongside licensed carrier distribution. Our go-to-market ecosystem is actively expanding — including partnerships with off-air infrastructure vendors who have built CBRS injection capability directly into their platforms.

The Canopy 5GID2 — our Release 16-compliant indoor 5G NR small cell supporting CBRS Band n48— is the Layer two engine. With network slicing, on-radio UPF option, and the external connectors enabling CBRS injection into DAS infrastructure, the 5GID2 is ready to power this architecture for enterprises across industry verticals. We are actively certifying it with multiple off-air and DAS partners today.

For systems integrators and enterprises: this is a coordinated, partner-delivered solution — deployable now, across manufacturing, warehousing, healthcare, education, retail, and commercial real estate. No carrier at the center. No undefined timeline.

If the building has adequate outdoor signal, there is no reason to wait. The off-air path is available now. Fast to deploy, carrier-independent, cost-effective, and capable of delivering both carrier coverage and private 5G on one infrastructure. We are building it — and we are ready to deploy it with you.

Coming in Part 2: when off-air isn’t the right path, and how the same two-layer architecture scales to any building, any signal environment, at any scale.

Have questions? Reach out to our team.

Stephen Leotis is the CEO of Moso Networks, a leader in private 5G infrastructure for enterprise and industrial environments. Moso’s Canopy product line — including the 5GID2 indoor 5G NR small cell — is purpose-built for CBRS-based private networks and enterprise operational connectivity.