Top Signal Fiber DAS 4400 Enterprise Active Cellular Amplifier System | SRFD44-MR

Fiber DAS Complete Cellular Distributed Antenna System

5ɢ ʀᴇᴀᴅʏ—will boost signal for the next decade and beyond
Bulk Pricing:
Buy in bulk and save
  • Enterprise active fiber DAS solution for 30,000 to 100,000 ft²
  • Scalable up to 400,000 ft² with additional Remote Units (sold separately)
  • Unparalleled solution for high-rise buildings, warehouses & large industrial sites
  • Supports 4 to 16 indoor broadcast antennas per Remote Unit
  • LED multifunction display & manual controls
  • Boosts voice and data on cellular bands 2, 4, 5, 12, 13, 17 & 25
  • Supports AT&T, Verizon, T‑Mobile & all other major carriers
Outside Signal Strength
Coverage @ 700 MHz LTE
5 Bars
Up to 100,000 ft² per RU
3 Bars
Up to 60,000 ft² per RU
1 Bar
Up to 20,000 ft² per RU

Free lifetime support
Calculated at Checkout

Product Description

Features of the Top Signal Fiber DAS 4400

  • Brings powerful, affordable active DAS cellular signal to commercial and public buildings.
  • Point-to-point fiber-optic trunkline delivers amplified signal from the Master Unit up to 3,300 feet (1 km) downline to up to four Remote Units with no appreciable loss of signal.*
  • This DAS cellular system covers up to 100,000 indoor square feet with one Remote Unit.** With additional Remote Units (sold separately), it can scale up to 400,000 square feet.
  • Excellent for long and tall buildings with large distances between the outside donor antenna and the area where signal coverage is needed.
  • Available for add-to-cart purchase with self-installation or as a custom-designed system for your building or other large enclosed area.
  • Amplifier units may be wall-mounted or rack-mounted.
  • Improves 5G and 4G/LTE voice and data on all common cellular frequencies. (Learn more about 5G compatibility.)
  • Carrier agnostic: Works with all major cellular carriers and networks in the United States and Canada.

The Top Signal Fiber DAS 4400 cellular distributed antenna system provides cellular reception in large buildings of all types, at industrial and utility sites, and for many other applications.

The fiber DAS system’s Master Unit (MU) receives signal from one or two outside donor antennas. The MU amplifies the signal it receives and sends it via a fiber-optic cable to a Remote Unit (RU). The optical fiber trunkline can be as long as 3,300 feet (1 km) without any significant loss of signal. The RU again amplifies the signal it receives and distributes it to cell phones and cellular devices via inside dome antennas. Each RU has four antenna ports—one RU can support one to sixteen antennas, depending on outside signal strength.

The Top Signal Fiber DAS 4400 cellular distributed antenna system provides strong cellular voice and faster data speeds for multi-story buildings and large facilities that other commercial cellular amplifiers are unable to handle and at a fraction of the cost of a carrier-installed active DAS system.

* This add-to-cart system includes 100, 250, 500, or 1,000 feet of fiber-optic trunkline cable. Please contact us for inquiries about longer or custom runs of optical fiber.
** 100,000 square feet per RU is possible with strong outside cell signal. Please contact us for more information.

Top Signal Fiber DAS 4400 building diagram with 16 antennas This add‑to‑cart system includes one Master Unit and one Remote Unit. One MU supports up to four RUs. Contact Powerful Signal to inquire about purchasing additional RUs. (Click to enlarge.)
Top Signal Fiber DAS 4400 diagram of Master Unit (front), Master Unit (rear), and Remote Unit (rear) (Click to enlarge.)

Who is the Top Signal Fiber DAS 4400 for?

  • Multi-floor office buildings.
  • Warehouses and distribution centers.
  • Below-ground parking garages, basement facilities, and bunkers.
  • Hotels and convention centers.
  • Healthcare and other medical facilities.
  • Power plants, dams, and mines.

Optional plenum air coax cable upgrade

The Top Signal Fiber DAS 4400 system includes TS‑400 coax cable to connect the Remote Unit to the inside antennas. If your building requires fire-rated cableexternal link icon in plenum spaces, you may upgrade to half‑inch plenum air coax by choosing the product option at the top of this page. Plenum cable fully meets state and federal building codes.

Half-inch cable also has nearly half the signal loss per foot of cable compared to TS‑400 coax cable, delivering stronger signal from the Top Signal amplifier and a larger indoor coverage area for phones and other cellular devices.

(Half-inch plenum cable is available at additional cost. Please contact Powerful Signal for more information about plenum-rated components.)

400-type coax cable and plenum air coax cable terminated with N-male connectors This system includes TS‑400 coax (left), but you can upgrade to fire-rated plenum air coax cable (right) for building-code compliance and better performance.

Best practices: a custom-designed Top Signal Fiber DAS 4400 solution

In a large building, office, or warehouse, you’ll get the best results and performance from the Top Signal Fiber DAS 4400 with a custom design and professional installation.

Working with your floor plans, Powerful Signal’s design engineers will create design specifications that will use the fewest number of components to get the maximum amount of cellular coverage inside your building.

Powerful Signal’s professional installer will have knowledge of local building codes and have the proper tools and experience to make sure your system is set up and configured correctly.

Call Powerful Signal at 435-634-6800 or request a free custom quote online. We’ll design a custom system that will solve your cellular reception and connectivity problems at the best possible price. We’ve designed thousands of cell signal amplifier systems—let us create one for you!

Top Signal Fiber DAS 4400 building diagram with 16 antennas An office building with amplified cellular signal from a Top Signal Fiber DAS 4400 active cellular amplifier system. (Click to enlarge.)

Top Signal Fiber DAS 4400 kit contents

The Top Signal Fiber DAS 4400 can be self-installed if you are familiar with cellular amplification equipment. We’ll be happy to advise you on the best placement of antennas or provide a custom, turnkey solution. If you purchase this system as a standalone product, it includes the following components:

Top Signal Fiber DAS 4400 Master Unit icon Top Signal Fiber DAS 4400 Master Unit (MU) + power supply cable
Top Signal Fiber DAS 4400 Remote Unit icon Top Signal Fiber DAS 4400 Remote Unit (RU) + power supply cable
OS2 Singlemode optical fiber 500 feet SC/APC connectors TS370500 icon 100′, 250′, 500′ or 1,000′ OS2 singlemode optical fiber with SC/APC connectors TS37xx00
OS2 Singlemode optical fiber 10 feet FC/APC and SC/APC connectors TS370010 icon 10′ OS2 singlemode optical fiber with FC/APC & SC/APC connectors TS370010 (×2)
Outdoor fiber-optic protection box with SC/APC-to-SC/APC coupler TS458001 icon Outdoor fiber protection box with SC/APC-to-SC/APC coupler TS458001 (×2)
Top Signal 5G/4G Outdoor Pole-Mount Directional LPDA Antenna with N-Female Connector (50 Ohm) TS220971 icon Top Signal wideband outdoor LPDA antenna TS220971 (×2)
Top Signal omnidirectional building antenna TS210471 icon Top Signal wideband outdoor omni antenna TS210471
Top Signal EDGE Dual-Mount Dome Antenna N-Female TS250620 icon Top Signal EDGE indoor dome antenna w/mounting hardware TS250620 (×4)
Top Signal TS-400 coax cable 100 ft. TS340100 icon 100′ Top Signal TS‑400 coax cable TS340100 (×6)
2′ Top Signal TS‑400 coax jumper cable TS340002 (×2)
Top Signal 5-watt N-male terminator icon Top Signal 5W N‑male terminator (×3)
Top Signal 50-ohm 2-way splitter with N-female connectors TS412101 Top Signal 2-way splitter TS412101
Top Signal 50-ohm lightning surge protector with N-male to N-female connectors TS450001 Top Signal 50‑ohm lightning surge protector TS450001 (×2)
Top Signal Fiber DAS 4400 installation guide icon Top Signal Fiber DAS 4400 installation guide

How the Top Signal Fiber DAS 4400 works

The Top Signal Fiber DAS 4400 Master Unit (MU) receives available outside cell signal, amplifies it, and transmits it via fiber-optic cable to one or more Remote Units (RUs). Each RU amplifies the signal again and rebroadcasts it inside your building through one to four antennas.

This active DAS system allows you to stay connected in areas where cell service is poor, where your building’s construction materials interfere with signals from local cell towers, or in other situations where cellular service is not available inside your facility.

Works with all major cellular carriers

The Top Signal Fiber DAS 4400 works with all major wireless carriers, including Verizon, AT&T, T-Mobile, DISH Wireless, UScellular, GCI Alaska, and most others.

It operates on common cellular frequencies.

  • 700 MHz (SMH) bands 12, 13, 17.
  • 850 MHz (Cellular 850) band 5.
  • 1700/2100 MHz (AWS) band 4.
  • 1900 MHz (PCS) bands 2, 25.
Carrier logos for Verizon, AT&T, T-Mobile, UScellular, DISH Wireless, GCI Alaska

How much area will the Top Signal Fiber DAS 4400 cover?

Each Remote Unit includes four dome antennas that broadcast improved cellular signal in a spherical pattern. The radius of that sphere depends on many factors, including:

  • Outside cell signal strength received by the donor antenna(s).
  • Inside building materials. (Cellular frequencies pass through wood framing and drywall more easily than through steel and concrete.)
  • Cellular frequencies used by the carrier. (Lower-frequency LTE and 800 MHz signals travel farther than higher-frequency AWS and PCS signals.)
  • Type of coax cable used to connect the antennas. (Half-inch coax cable has nearly half the loss and twice the coverage area of TS‑400 coax.)

Under optimal conditions, with no interior obstructions, you can expect the following approximate coverage areas, based on outside signal strength and the number of Remote Units (RUs) and installed antennas:

 Outside signal strength
1 RU / 4 antennas (add‑to‑cart)
2 RUs / 8 antennas (call for pricing)
3 RUs / 12 antennas (call for pricing)
4 RUs / 16 antennas (call for pricing)
Outside signal strength −95 dBm RSRP (5 bars)
1 RU / 4 antennas100,000 ft²
2 RUs / 8 antennas200,000 ft²
3 RUs / 12 antennas300,000 ft²
4 RUs / 16 antennas400,000 ft²
Outside signal strength −105 dBm RSRP (3 bars)
1 RU / 4 antennas60,000 ft²
2 RUs / 8 antennas: 120,000 ft²
3 RUs / 12 antennas: 180,000 ft²
4 RUs / 16 antennas: 240,000 ft²
Outside signal strength −115 dBm RSRP (1 bar)
1 RU / 4 antennas20,000 ft²
2 RUs / 8 antennas: 40,000 ft²
3 RUs / 12 antennas: 60,000 ft²
4 RUs / 16 antennas: 80,000 ft²

FCC notice

For information on federal rules governing the use of consumer cell signal boosters, please see our FCC notice page.

Prop 65 notice

Caution triangle icon Warning This product can expose you to chemicals, including nickel, which is known to the State of California to cause cancer, and Bisphenol A, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to link icon.

Product Specifications

Large building
Strong outside signal (−95 dBm RSRP, 5 bars):
Up to 100,000 ft² indoor coverage per RU @ 700 MHz
Fair outside signal (−105 dBm RSRP, 3 bars):
Up to 60,000 ft² indoor coverage per RU @ 700 MHz
Weak outside signal (−115 dBm RSRP, 1 bar):
Up to 20,000 ft² indoor coverage per RU @ 700 MHz
Outside Antenna:
Directional LPDA (×2) & omnidirectional cylinder (×1)
Inside Antenna:
Omnidirectional dome (×4)
Cable Type:
OS2 single-mode fiber-optic + 400 or half-inch
Connector Type:
50 Ω
+70 dB max
Booster Case Material:
Signal Readout:
LED active multifunction display

Warranty Information

This commercial-use fiber DAS amplifier is protected by the manufacturer’s full warranty. It is returnable only for warranty-related issues. The purchaser is encouraged to consider a designed system from Powerful Signal or, if opting for self-installation, to thoroughly understand how cellular amplifier systems are set up and operated and to consult with Powerful Signal before and during installation regarding best practices for optimum performance of the amplifier and its components.

This signal amplifier is warranted for three (3) years against defects in workmanship and/or materials. Warranty cases may be resolved by returning the product directly to Powerful Signal with a dated proof of purchase. (See Powerful Signal’s return policy.)

Signal amplifiers may be returned directly to Powerful Signal at the purchaser’s expense, with a return merchandise authorization (RMA) number supplied by Powerful Signal. Powerful Signal shall, at its option, either repair or replace the product. Powerful Signal will pay for delivery of the repaired or replaced product back to the original purchaser if located within the continental United States.

This warranty does not apply to any signal amplifiers determined by Powerful Signal to have been subjected to misuse, abuse, neglect, or mishandling that alters or damages physical or electronic properties.

Failure to use a surge-protected AC power strip with at least a 1000 Joule rating will void your warranty.

All products that are packaged with other accessory products are intended for resale and use as a single unit, and such product kits are required to be sold to the end user or subsequent reseller as packaged. The “de-kitting” and sale as a standalone product of any one or more components of such a product kit is in violation of the manufacturer’s warranty. No “de-kitted” product will be eligible for return for any reason. (The sale of separate, not-kitted cable, antennas, and other accessories is allowed and fully warranted.)

Components and accessories are warranted for 90 days against defects in workmanship and/or materials.

This warranty does not apply to any accessory or component determined by Powerful Signal to have been subjected to misuse, abuse, neglect, or mishandling that alters or damages its physical or electronic properties.

To resolve a warranty case, contact Powerful Signal by phone (435-634-6800) or online.

Questions & Answers