EMTS Telecom Services
DISTRIBUTED ANTENNA SYSTEM PRODUCTS

DAS & Fiber Systems

RF and fiber-optic Distributed Antenna System platforms for reliable in-building and infrastructure coverage, supporting commercial cellular, public-safety and railway communication networks.
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Product Groups

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Cellular 2G 3G 4G 5G

Integrated Fiber DAS platforms including Master Units and Remote Units for high-capacity in-building, tunnel and infrastructure deployments.
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Mission Critical Communications DMR & TETRA

Dedicated Fiber DAS architectures for mission-critical, DMR, TETRA, P25 and public-safety communications.
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Looking for another DAS configuration?

The products displayed on this website represent only a selection of EMTS DAS capabilities. Our full portfolio includes additional frequency ranges, output powers, topologies, optical configurations and customized system architectures. If you cannot find the product or system you require, please contact us.
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EMTS Telecom - Advanced Fiber DAS Solutions

High-capacity multi-operator and multi-technology coverage, 450 MHz to 5000 MHz

EMTS Telecom Services delivers advanced Fiber Distributed Antenna System, DAS, solutions designed to extend high-capacity cellular, public-safety and railway radio communications into complex, high-density and RF-shielded environments. Our modular Fiber DAS architecture enables the integration of commercial mobile broadband and mission-critical networks over a unified optical infrastructure.
Fiber DAS rack equipment
Example of rack-mounted Fiber DAS master and remote-access equipment.
Corporate Fiber DAS architecture
Illustrative Fiber DAS architecture showing the master unit, fiber backbone and distributed remote units.

Ultra-Wide Spectrum Support, 450 MHz to 5000 MHz

Support for a broad continuous frequency range spanning from lower sub-1 GHz bands, including LTE Band 31 at 450 MHz, up to 5G NR n79 at 5000 MHz.

MIMO Configuration Support

System architectures designed to support both 2×2 MIMO and 4×4 MIMO deployments for enhanced throughput, spectral efficiency and multi-user capacity in 4G LTE and 5G NR networks.

Native 4G LTE & 5G NR Performance

Engineered for wideband RF distribution, supporting advanced 4G LTE and 5G NR Sub-6 GHz services across indoor, underground and infrastructure environments.

Multi-Operator Neutral Host Architecture

Supports simultaneous signal transport for multiple mobile network operators over a shared optical backbone.

Mission-Critical & Railway Integration

Dedicated optical and RF modules for GSM-R, TETRA, DMR and additional mission-critical services.

High-Power Master & Remote Units

Master Head-End and Remote Access Units convert RF to optical signals and distribute coverage over long single-mode fiber links with minimal loss.

Scalable Star & Daisy-Chain Topology

Flexible network topologies for high-rise buildings, airports, rail environments, tunnels, campuses and other large-scale infrastructure projects.

Advanced Monitoring & Management

Integrated web-based NMS capabilities for diagnostics, optical power supervision, gain management, alarm reporting and system monitoring.

Fiber DAS Systems for Cellular and Mission-Critical Coverage

Fiber DAS systems distribute radio signals over optical fiber from a central headend to remote units installed where coverage is needed. First, a master unit (MU) connects to the signal source, such as a base station, a point of interface (POI) or an off-air repeater, and converts the RF signal to optical. Then, remote units (RU) convert it back to RF and feed local antennas. Because optical fiber has far lower loss than coaxial cable over long runs, a distributed antenna system (DAS) built on fiber can serve large buildings, campuses, tunnels and underground sites.

EMTS offers fiber DAS systems in two product groups: one for cellular networks and one for mission-critical radio.

Cellular fiber DAS systems, 2G to 5G

The cellular fiber DAS group includes master units and dual, tri and quad band remote units for combinations of 900, 1800, 2100 and 2600 MHz. For example, low power MIMO remote units are rated around 23 dBm, while high power remote units reach up to 43 dBm. In addition, multi-band systems for private 4G and 5G networks are available, with configurations for Band 31, Band 26, n78 and n79. For 5G NR n78 with 4×4 MIMO, see the 5G fiber DAS group.

Mission-critical fiber DAS for TETRA, DMR and P25

The mission-critical fiber DAS group covers VHF, 400 MHz and 800 MHz systems for TETRA, DMR, P25 and analog land mobile radio. Specifically, it includes master units, high power fiber remote units, fiber optic repeating systems and pickup repeaters in 19 inch enclosures that bring an off-air signal into the system.

When to choose fiber DAS instead of a repeater

An off-air cellular RF repeater is often enough for a single area with a usable donor signal. However, fiber DAS systems become the better choice when the site is large, has many floors or underground levels, needs several operators or radio services on one infrastructure, or requires cable runs that coaxial cable cannot support without excessive loss. For a detailed comparison, read Fiber DAS vs. RF Repeaters: Choosing an In-Building Coverage Solution.

Information needed to design a fiber DAS

  • Floor plans or site maps, and the areas that require coverage
  • Operators, bands and technologies, including any public safety services
  • Signal source: base station, POI or off-air donor
  • Required MIMO configuration and capacity
  • Fiber routes, power availability and monitoring needs

Frequently asked questions about fiber DAS

What is the difference between a master unit and a remote unit?

The master unit sits at the headend and interfaces with the signal source. In contrast, remote units are installed in the coverage area and connect to the antennas. One master unit can serve several remote units, depending on the model.

Can one fiber DAS carry cellular and public safety signals?

EMTS offers cellular and mission-critical fiber DAS as separate product groups. Therefore, a combined design depends on the bands and equipment involved, so it should be reviewed with our engineers.

Contact EMTS with your site details to discuss a fiber DAS design.