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Cel-Fi QUATRA 4000 (Part 20) Active DAS Hybrid Cellular Solution

Nextivity Cel-Fi QUATRA 4000

Cel-Fi QUATRA 4000 (Part 20) Active DAS Hybrid Cellular Solution

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    Cel-Fi Quatra is a custom designed in-building enterprise cellular system. It is a hybrid active Distributed Antenna System (DAS) that boosts coverage.

    • Up to 100 dB Active DAS Hybrid (1000x Stronger).
    • Single or Multi-Carrier Solution.
    • 3G / 4G / LTE for Voice and Data.
    • Carrier-Approved and Unconditionally Network Safe.
    • Scalable All-Digital PoE Cat5e Solution for Middleprise.
    • Remote Monitoring and Management via WAVE Platform.
    • Certifications: FCC, CE_RED, ISED, cETL, ETL, CE, ICASA, SRRC, NAL, RCM.

    Call for FREE consultation:


    Need installation quote, or help with designing a custom solution? Submit a request for quote.

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    Product Description

    Nextivity Cel-Fi QUATRA 4000 (Part 20) is in-building enterprise cellular booster system that improves coverage of all four major carrier networks in USA including bands 2, 4, 5, 12, 13, and 25. It is a hybrid active DAS that solves coverage issues for voice and data.

    The Cel-Fi QUATRA 4000 is a powerful in-building Active Distributed Antenna System (DAS) Hybrid that has been designed specifically to resolve the issues of weak cellular signal in middleprise buildings; meaning those customers who are big enough to finance enhanced in-building wireless but not big enough to appeal to major carriers to invest in in-building wireless.

    Greater Coverage Area.

    The CelFi QUATRA-4000 is an enterprise-level signal boosting system that boosts LTE, 4G, and 3G data and voice, on up to four bands from all four major operators, simultaneously. Compared to other boosters, this boosting solution delivers a signal up to 1,000 times more powerful, boosting signal up to +100 dB with a variation of up to +30 dB. While delivering a strong signal, the QUATRA4000 delivers a larger coverage footprint in situations where the incoming signal is poor, thus ensuring that inside antennas receive the strongest possible signal.

    Improved Signal.

    Instead of using analog coaxial cables causing cellular signal degradation over long distances, this system uses Cat5e cables and Power-over-Ethernet (PoE), which means longer cable runs and digitally transmitted signal to deliver better quality signal.

    Cat5e cable runs up to 325 feet per Coverage Unit (the system's remote unit responsible for rebroadcasting the donor signal).

    Installation & Deployment: Can Take Care of Everything.

    Here at, we offer a complete turnkey service of IBW (in-building wireless) systems that boosts indoor cellular signal to ensure users have access to strong and reliable signal. Right from your initial contact with through to post-project, our professional team of certified signal booster specialists including designers, system integrators, and RF engineers will take ownership of your project and handle every detail.

    With help from, this hybrid signal amplifier or small cell signal enhancing system is easy-to-deploy and cost-efficient. This hybrid solution combines the best of Smart Booster and digital active DAS technologies. It is self-optimizing and self-configuring, while installation and configuration is made simple by the Cel-Fi WAVE Portal.

    About the Cel-Fi QUATRA 4000 Cellular Signal Boosting System.

    This multi-carrier boosting system is an in-building business cellular boosting system. Approved and specifically to be used on the US's four main carrier networks, it is an Active DAS Hybrid boosting solution. It is the perfect solution for middleprise buildings, delivering coverage for multiple carriers in buildings with area as large as 500,000 ft² from a single system.

    Designed and constructed based on Cel-Fi technology, this all-digital cell signal enhancement system is the only boosting solution available on today's market that is capable of supporting up to 100 dB of gain. Using Nextivity’s 4th generation Intelliboost chipset technology, each NU (Network Unit) is capable of supporting up to six CU (Coverage Units). One of the features of this boosting solution is that it has a cellular modem built-in to support the latest Cel-Fi WAVE PRO Platform, while another first is that it is the only integrated product on today's market that is capable of relaying Time Division Duplex (TDD) LTE bands.

    Another bonus with the Nextivity Cel-Fi QUATRA 4K is that it can be tethered to the small cells of carriers or deployed off air; alternatively, a multicarrier Supercell (a large single cell) can be created by incorporating it with the small cell equipment of carriers and operating it in small cell distributed mode. From the aspect of planning and deployment, Supercells are essentially uncomplicated. They are certainly a lot more resilient than individual small cells when it comes to performance degradation and interference issues. Supercells deliver reliable and consistent access to capabilities introduced by small cells to boost cellular signal coverage in densely populated or larger areas.

    Cel-Fi QUATRA 4K is a Boon to Middleprise Consumers.

    The Cel-Fi QUATRA-4K has come at just the right time for middleprise consumers across a number of industries. Today, these consumers can choose from our multicarrier, dual, or single solutions, subject to each person's specific requirements. By introducing this innovative system, Nextivity is supporting a largely forgotten market by delivering a full range of signal coverage options; at the same time removing the time, complexities, and costs involved with more common DAS boosting solutions.

    Another bonus with the QUATRA4K is that, like earlier versions, this cellular signal boosting solution can be up and running within weeks, rather than months. When compared to DAS systems that are more expensive and can take anywhere between 1 and 2 years to deploy, the QUATRA 4000 comes at a much lower installed cost per square foot. This is achieved by leveraging Power-over-Ethernet (POE) and RF-over-Ethernet (RFoE), and removing unnecessary complexities.

    All Customers Can Now Enjoy Uninterrupted Indoor Coverage.

    Nextivity’s Cel-Fi QUATRA 4000 delivers maximum power levels by offering independent gain to each carrier signal; unlike similar products where a boosted single value is offered to the strongest input signal only. The result is that it is not only users whose carrier delivers the stronger signal who get to enjoy reliable and uninterrupted indoor coverage, it means that subscribers from all networks can now experience reliable coverage in shopping malls, schools, hospitals, office buildings, manufacturing facilities and other indoor locations.

    While boosting LTE, 4G, and 3G data and voice simultaneously on up to four bands from four operators, this cell phone signal booster system is a powerful in-building cellular Distributed Antenna System (DAS) that is specifically suited to precise and detailed remote monitoring of the equipment as well as the actual wireless environment being served by the equipment with Cel-Fi WAVE PRO. This is an easy to install, cost-effective, powerful Active DAS Hybrid boosting system, designed specifically to serve the middleprise sector. This booster uses CAT5e cabling for Power-over-Ethernet and RF. Each booster system includes one Network Unit and six Coverage Units, and can cover an area up to 70,000 ft².

    How The Cel-Fi QUATRA 4000 Signal Boosting System Works.

    The Cel-Fi 4000 Quatra is a hybrid boosting solution that operates by capturing cellular signals from external macro networks, boosting those signals, then using the coverage units to relay their signal indoors. This boosting solution is self-optimizing and self-configuring and is a combination of both Smart Booster and Active DAS. Installation is the easiest in its class using the Cel-Fi WAVE App Portal.

    About the Cel-Fi WAVE Platform.

    This is a remote management, cloud-based platform that facilitates maintenance and device management of Cel-Fi systems. Special features of the Cel-Fi WAVE Platform include the following:

    • Cel-Fi asset and device management.
    • Desktop and mobile applications; ease-of-use is facilitated by the WAVE mobile app.
    • Data reporting and modelling.
    • Reliable carrier-grade security.
    • Alarms and alerts can be either customized or used as recommended settings, whichever the user prefers.
    • Access to the WAVE Platform portal is either integrated via APIs or through the dashboard interface.

    There are currently two versions available of the Nextivity QUATRA 4000. The first is the regular QUATRA 4000 which delivers coverage up to 75,000 ft² (this purchase). The second is the industrial version, the Nextivity Cel-Fi QUATRA 4000i, and it is this booster that also supports Band 41 coverage.

    The following are significant improvements that have been made to the CelFi QUATRA 4000 signal boosting system:

    • This boosting system now supports all four major carrier networks simultaneously - Verizon, Sprint, T-Mobile and AT-T.
    • Users now achieve more downlink power and wider coverage. To maximize the coverage they support, Coverage Units for the QUATRA 4000 have enhanced downlink power. This model has increased the coverage area by 50% because it includes 6 CUs, whereas previous versions only included 4.
    • This is the first QUATRA boosting system that supports small cells being overlaid, thus increasing coverage options with all four carriers.
    • A number of installer friendly changes have been made to ensure that set-up for integrators is straightforward. The QUATRA 4000 now uses N-type connectors. If there's no ethernet connection, there's a built-in SIM card slot in the internal modem for connectivity. The single N-Type connector in the Coverage Unit perfectly suits a passive antenna design. Previous generations used one coaxial input per band, often causing signal issues with two carriers sharing the same band; whereas coaxial inputs with the Cel-Fi QUATRA 4000 are now one per carrier.
    • The Cel-Fi QUATRA 4000 signal boosting system is currently the only signal boosting system to support AT&T's Band 41.
    • A separate power supply is not required for the Coverage Units because coverage is provided through Power-over-Ethernet. There's no need for administrator intervention because gain control in the Network Unit always ensures top coverage and maximum gain in changing RF environments.

    Components of the Cel-Fi QUATRA 4000 Signal Booster.

    While optional accessories are always available, the standard Cel-Fi QUATRA 4000 kit comes with one NU (Network Unit) and six CUs (Coverage Units).

    QUATRA 4000 Network Unit (NU).

    The Network Unit of the Cel-Fi QUATRA 4000 is the signal boosting system's hub. It works with up to 6 Coverage Units to deliver coverage of up to 75,000 ft². Signal from the donor antenna is received by the Network Unit, delivering power to up to 6 Coverage Units. Remote Monitoring allows for the system to be administered by the WAVE Cloud Platform. The Network Unit weighs approximately 8 pounds and comes in an attractive metal case. There is one Network Unit in each standard kit.

    QUATRA 4000 Coverage Unit (CU).

    The remote radio head of the system, the Coverage Unit of the Cel-Fi QUATRA 4000 is responsible for rebroadcasting the signal of the donor. Each CU provides boosting system coverage, and each Coverage Unit is driven from the Network Unit's Power-over-Ethernet. There are six CUs in a standard kit.

    QUATRA Range Extender (QRE).

    An optional accessory, the Range Extender's purpose is to extend the largest distance between the Network Unit and the Coverage Unit by enabling CU-to-NU cable lengths of up to 650 feet (200 meters). With the Quatra Range Extender, no PoE injector or separate power supply is required because this is a Power-over-Ethernet device.

    Any purchase of Cel-Fi by Nextivity products comes complete with a 2-year warranty.

    Cost Price of Nextivity Cel-Fi Quatra 4000 System.

    Cel-Fi Quatra is a custom signal enhancing solution that consists of tiered equipment cost depending upon equipment required based on building construction design (or blueprint if available) and respective professional installation cost of that equipment. Therefore, the pricing varies greatly so we're very sorry we cannot provide even a rough equipment cost estimate and installation timeframe. Please submit location details at following link to begin process of determining an exact installation quote with installation time-frame:

    We look forward to maximizing wireless reception for you, at minimal cost possible. Please note that alteration will be required to ensure full coverage at the most cost effective price point. Please submit details at link above or please contact us for custom designing and installing this kit that requires professional installation by certified installers. We provide installations nationwide across United States for this and other cellular signal enhancing systems.

    WARNING. Per FCC laws and regulations, this INDUSTRIAL GRADE device must not be installed by consumers. It is designed for installation by QUALIFIED INSTALLERS only. You MUST have an express consent in writing from all Carriers in your service area to operate this device. Unauthorized use may result in significant forfeiture penalties, including penalties in excess of $100,000 for each continuing violation. Please contact us for a quote if you require professional installation and assistance with consent and approval process.

    Alternate part names:

    • cel-fi quatra
    • cel-fi quattra
    • celfi quatra
    • celfi quattra
    • cell-fi quatra
    • cell-fi quattra
    • cellfi quatra
    • cellfi quattra

    Cel-Fi QUATRA 4000 Introductory Video:


    Cel-Fi QUATRA 4000 In-Building Enterprise 3G, 4G, 5G Cellular Coverage Solution.

    For enterprises, Cel-Fi QUATRA 4000 series is an affordable, all digital solution providing uniform, high quality cellular signals throughout a building.

    Why is the Cel-Fi QUATRA 4000 needed?

    Modern building materials, while improving energy efficiency, will block or inhibit cellular service from outside network. Cellular coverage is an increasingly critical part of any business operation and daily life. In fact, cellular coverage can be considered a safety or even regulatory requirement, depending on the region. Building owners need a flexible, high quality solution. Installers and value added resellers need a product that can serve the majority of building types and not take months to deploy. Cel-Fi QUATRA 4000 solves that problem. It is an affordable, all digital solution providing uniform, high quality cellular signals throughout the building. Cel-Fi QUATRA 4000 is scalable to fit buildings of all sizes. It is carrier approved and guaranteed network safe.

    What is Cel-Fi QUATRA 4000?

    Unlike traditional analog boosters and passive DAS technology, QUATRA delivers a cellular signal that is up to 1000 times stronger. It utilizes CAT 5e cabling for the connection between the head end and each remote. The remotes are powered via power over ethernet, delivering an unattenuated signal throughout the building. Cel-Fi QUATRA 4000 can be installed in just days, compared to months typical of other solutions, and at a price point that meets the business budget.

    Features of the Cel-Fi QUATRA 4000.

    Cel-Fi QUATRA 4000 is comprised of a network unit and up to six coverage units per network unit. The network unit takes the donor input from up to four carrier signal sources. The scalable architecture allows for as many network units needed for the size building being covered. The signal source can be off air (OA) / direct Carrier feed line, or over the air (OTA) from the macro network, or delivered via a small cell.

    The Network Unit (NU) receives and individually processes channels from each carrier, allowing a higher gain on weaker channels up to 100 DB. The channels are digitized and sent over a pair of ethernet cables to each coverage unit for retransmission through one or more service antennae.

    The coverage unit can either deliver the signal directly with the included Cel-fi blade antenna, or passively distribute to up to 10 Cel-Fi low profile omni antennas. Additionally, the Cel-Fi QUATRA 4000 range extender is a power over ethernet device that extends the maximum distance between the Cel-Fi QUATRA network unit and the coverage unit, up to 200 meters.

    Cel-Fi QUATRA 4000 Key features.

    Cel-Fi QUATRA 4000 is based on the award winning carrier grade technology with Intelliboost chipset at the core, and the Cel-Fi wave remote management platform. Key features include a multi-carrier active DAS hybrid solution providing industry leading coverage with up to 100 decibels of max gain. It is a scalable solution for up to 75,000 ft. squared per network unit, super cell or off air modes.

    It is an all digital solution that is network safe, and carrier approved. Cel-Fi QUATRA 4000 is a powerful cellular signal distribution solution. Learn why operators, building owners and integrators choose Cel-Fi to get the best cellular coverage possible. Contact authorized Cel-Fi integrator, for more details or submit installation questionnaire to get started.


    Customer Reviews

    Questions & Answers


    Ask a Question
    • My CU lights are all solid green, but my system is not relaying?

      All of the CU lights will turn solid green once the CU starts relaying one channel, give the system some time to start relaying the additional channels.

    • Can I extend the NU to CU cables more than 100 meters?

      Yes. The standard Cat5e cable length maximum is 100 meters, or 200 meters if a QUATRA Range Extender is used halfway along the cable length. 150 meters (300 meters with a QRE) is possible with thicker 22/23 gauge CAT6/7 Ethernet cables.

    • How many antennas can I use with a QUATRA 4000 CU?

      It all depends on the type of application, we recommend up to four antennas depending on cable losses.

    • Can the QUATRA 4000 LTE modem and LAN Port be connected at the same time?

      Yes, the LAN connection has priority over the modem, however the modem may serve as a backup.

    • What is the SFP+ module dock on the NU used for?

      This port will be used for future fiber expansion.

    • What is the USB on the back of the QUATRA 4000 used for?

      The USB on the back of the QUATRA 4000 NU is for COMPASS Connection. The USB on the back of the QUATRA 4000 CU is for Nextivity use only.

    • Can you combine both donor antenna feeds?

      Yes, if the donor signal is coming from the same direction.

    • What are the QUATRA 4000 key features?

      Carrier Grade, FCC-certified Smart Signal Booster.

      Support for AT&T, Verizon, T-Mobile and Sprint.

      Relays two (2) bands per operator, simultaneously. 

      Independent donor ports for each operator allows for independent antenna optimization.

      Single combined (CU) server port enables driving either a serving antenna or passive DAS field.

      100 dB max system gain.

      140MHz total relay bandwidth: 6 channels x 20MHz; 2 channels x 10MHz.

      Support for up to six (6) CU via Cat5e cable.

      N-type RF connectors (donor and server).

      Internal modem for remote management (SIM slot access).

      Up to 100m distance between NU and CU.

      QUATRA Range Extender (QRE) extends the NU to CU distance by 100 meters.

      20-22dBm uplink power per operator per band.

      16dBm downlink power per operator per band.

    • How does the QUATRA 4000 work?

      Cel-Fi QUATRA 4000 is a powerful cellular signal distribution solution. Cel-Fi QUATRA 4000 is fundamentally comprised of a Network Unit (NU) and up to six (6) Coverage Units (per NU).

      The Network Unit takes the donor input from up to four (4) carrier signal sources. The signal source can be off-air [over-the-air (OTA)] from the macro network, or delivered via a small cell. Each port is carrier specific and can be either off-air or small cell driven.

      The NU receives the source signal, digitizes the RF, and distributes it over two Category (Cat5e) cables (per CU) to the CU. The CU converts the digital signal back to RF, boosts it, and transmits from its RF port to provide cellular coverage at the location.

    • Can I use the QUATRA 4000 system outdoors?

      Cel-Fi QUATRA 4000 is for indoor use only and it should not be used outdoors.

    • What is the difference between the QUATRA 4000 and the QUATRA 4000i?

      There are two variants available for the Cel-Fi QUATRA 4000:

      Cel-Fi QUATRA 4000: The QUATRA 4000 is FCC Part 20 certified. It supports bands 2,4,5,12,13, 25.

      Cel-Fi QUATRA 4000i: The QUATRA 4000i is FCC Part 90 certified. It supports bands 2,4,5,12,13, 25, 26, 30, 41, and 71.

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    Note: For any signal booster to help, outside signal strength must be at least -110 dB or there must be a clear line of sight to a cell tower that is within twenty miles. Before ordering, please check outside signal level in decibels or ensure that you can make and hold a phone call at any good spot outside where you can mount an exterior antenna. Square footage stated in signal booster listings is based on good signal outside. If it is any weaker, the boosted sq. ft. area will be considerably lower, accordingly.

    Kevin K. of Anderson, California gave the following review:

    Website is easy to use with plain straight forward info but could have had more on testing signal strength to make sure you get a strong enough booster.

    Therefore, please note that stated sq. ft. coverage is based on good signal outside. For best results: If outside signal is weak, we suggest choosing the next higher sq. ft. coverage kit. If outside signal is very weak, we suggest choosing the kit with even more higher sq. ft. range bracket. Basically, higher the sq. ft. bracket, the more powerful the signal amplifier with greater Gain as well as higher uplink and downlink output power.

    If outside signal is too weak (weaker than -110 dB), submit request for cell coverage solution assessment. Upon receipt of questionnaire, we will perform residential or business site survey. This will help us determine the system that is needed to improve cell coverage. Then, we will create system design using that system such as femtocell, active or hybrid distributed antenna system (DAS), or other carrier feed signal enhancing method available that will work at your signal-challenged location. Finally, we will schedule for installation after equipment and installation service quote has been approved by you, or your company.

    For non installation-included kits: Most home / office / building cell signal booster kits only include bracket to mount exterior antenna on outside wall, edge of roof, or existing pipe up to 2 inches in diameter. Mounting pole not included with most kits, unless stated specifically that it is included for free. Therefore, a mounting post must be purchased separately if you will require it to mount exterior antenna.

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