888-973-2867
In a crisis, coverage can't be the thing that fails
Schools and campuses need a 911 call to connect from any room, an alert to reach everyone, and a responder's radio to work the moment they walk in. Sector builds the in-building coverage that carries all of it, and the panic buttons and gunshot detection that can ride on top.
WHEN SECONDS COUNT
A dead zone in a school is a safety gap
A campus runs on connectivity, but in a crisis it becomes a safety system. A 911 call has to go through from the far corner of the building. A lockdown alert has to reach every classroom. A first responder's radio has to work the second they cross the threshold. Brick, concrete, and steel block all of it, and the dead zone nobody noticed on a normal day becomes the gap that costs time when time matters most.
Cellular and Wi-Fi alone don't cover this. Wi-Fi drops devices between buildings and won't carry a responder's radio. The fix is in-building cellular and public-safety coverage built for the whole campus.
WHY SECTOR FOR THIS SOLUTION
Coverage built around the incident
We design for the moments that matter: a 911 call that connects, an alert that reaches every room, and responder radio and FirstNet that work throughout the building, not just near the entrance.
One backbone, more than coverage
The same distributed antenna system can carry panic buttons and gunshot detection, so the infrastructure you put in for connectivity does double duty for safety.
Part of a complete safety plan
Cellular Resilience is one of the four pillars of our Alyssa's Law work. We can tie it into a wider school-safety program rather than leaving it as a standalone box.
COVERAGE BUILT FOR SAFETY
THE BACKBONE
Coverage that carries safety
A distributed antenna system distributes cellular and public-safety radio throughout the building so the critical channels work everywhere. Cellular keeps 911 calls and mass alerts moving on the carrier networks. Public-safety DAS connects two-way radios and FirstNet for responders. It covers staff and students on a normal day and the people responding on the worst one.
Carries911 callsMass notificationResponder radio and FirstNet
DETECTION
Panic buttons and gunshot detection on the same system
Smart antennas placed through the building can host BLE panic buttons and acoustic gunshot detection. The detection runs on the antenna and on a local edge server, distinguishes a gunshot from other loud noises, and sends an alert with a room-level location in seconds. No audio is recorded, so it doesn't create a privacy problem for students or staff.
How it worksAI acoustic sensingRoom-level locationNo audio recorded
ALYSSA'S LAW
See our Alyssa's Law solution →
One pillar of a wider safety plan
In-building coverage sits alongside the rest of our Alyssa's Law work. The panic-alert and notification requirements that drive school-safety law depend on signal that actually reaches every room, which is exactly what a DAS provides. We can scope coverage on its own or as part of the larger program.
HOW A CAMPUS GETS COVERED
1
Site survey and design
Tell us about your campus. We run a pre-installation signal sweep, map the dead zones building by building, and develop a conceptual design to code.
2
AHJ submission
We prepare and submit the design documentation to the Authority Having Jurisdiction and work through review and approval.
3
Coordination
A pre-installation meeting aligns schedule, cable pathways, equipment locations, and the other trades before any cable goes in.
4
Installation
Amplifiers, donor and interior antennas, cabling, and battery backup go in. Public-safety systems add the annunciator panel and emergency power-off.
5
Commissioning and acceptance
We configure and commission the system, run the final sweep and grid testing, and support the AHJ inspection.
6
Training and support
We train your designated personnel and put an ongoing maintenance plan in place.
SECTOR VS. BUYING THE HARDWARE
| Sector | Hardware only | |
|---|---|---|
| Survey and design for the campus | ✓Pre-install sweep, dead-zone mapping building by building, and a design to code | ✗A box with no survey and no design |
| Coverage that carries safety | ✓911 calls, mass alerts, and responder radio designed to reach every room | ✗Cellular only, with no responder coverage or acceptance |
| One backbone, more than coverage | ✓Panic buttons and gunshot detection can ride the same system | ✗Separate vendors and systems to integrate yourself |
| Maintenance and warranty | ✓Quarterly maintenance, 24/7 remote support, RMA managed for you | ✗You file your own claims and chase the manufacturer |
FEATURED PRODUCTS FOR THIS SOLUTION
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CEL-FI GO G41 - Single-Operator Cellular Coverage Solution
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Combining unmatched performance with ease of installation, CEL-FI GO G41 is a singleoperator cellular signal booster that delivers reliable in-buil...
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CEL-FI GO G41 FN - Cellular Coverage Solution for FirstNet®
Nextivity
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The CEL-FI GO G41 FN is a cellular coverage solution for AT&T signals, including FirstNet Band 14 to ensure reliable in-building FirstNet conne...
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CEL-FI GO G43 - Multi-Operator Cellular Coverage Solution
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Designed to offer retailers, convenience stores, quick serve restaurants, and other small businesses a fast way to solving in-building cellular cov...
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CEL-FI GO G43 FN - Multi-Operator Cellular and FirstNet Coverage Solution
Nextivity
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$5,249.00
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Designed to offer retailers, convenience stores, quick serve restaurants, and other small businesses a fast way to solving in-building cellular cov...
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CEL-FI QUATRA 4000/EVO Range Extender
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The CEL-FI QUATRA Range Extender (QRE) is a Power over Ethernet (PoE) device that extends the maximum distance between the CEL-FI QUATRA Network Un...
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CEL-FI QUATRA Fiber Range Extender
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$1,428.30
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$1,699.70
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Compatible with all CEL-FI QUATRA systems, the QUATRA Fiber Range Extender (QFRE) increases the distance between the Network Unit and the Coverage ...
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QUATRA EVO Coverage Unit
Nextivity
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$1,821.00
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The Coverage Unit (CU) is the remote unit of the system that rebroadcasts the donor signal. The cost efficient and easy-to-deploy system leverages ...
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QUATRA EVO Network Unit
Nextivity
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The Network Unit (NU) is the hub of the system. Each NU works with one to six Coverage Units (CU) for maximum scalability and design flexibility. ...
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CEL-FI QUATRA EVO FN - In-Building FirstNet Cellular Coverage Solution
Nextivity
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$1,821.00
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Solving FirstNet cellular coverage challenges for enterprise environments, CEL-FI QUATRA EVO FN is an intelligent active DAS that offers uniform, h...
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QUATRA EVO Fiber Hub
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CEL-FI QUATRA EVO Fiber Hub expands the Network Unit capacity from six to up to twelve Coverage Units. The fiber hub can be installed 1.24 miles (2...
View full detailsBRANDS FOR THIS SOLUTION
It's one piece of it. Alyssa's Law focuses on panic alerts and fast notification to first responders. Those depend on coverage that reaches every room, which is what the DAS provides. We can handle the coverage alone or as part of a full Alyssa's Law program.
No. The detection runs on the antenna and processes sound locally to flag a gunshot. No audio is recorded or stored, so it doesn't create a privacy issue.
No. Wi-Fi won't carry a 911 call or a responder's two-way radio, and it drops devices as people move between buildings. Cellular and public-safety coverage work the way phones and radios already do.
No. The systems install over standard cabling with minimal disruption and can be deployed building by building. Some can be set up as a service to avoid a large upfront capital cost.
Is there a dead zone in your building?
Sector designs, installs, and supports in-building cellular and public-safety coverage for K-12 and higher education, and can carry panic buttons and gunshot detection on the same system. Tell us about your campus.