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Enabling Emergency Communications Indoors

Avari® Wireless designs and manufactures public safety (PS) Digital Distributed Antenna Systems (DAS) for Emergency Responder Communications Enhancement Systems (ERCES).​​

Who is Avari® Wireless?

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Being able to communicate with wireless public safety two-way radio systems indoors is crucial for first responders to execute time-sensitive and mission-critical tasks to protect the public. Unfortunately, this is not always possible due to building materials that may weaken or block out wireless signals. An ERCES is often installed to provide these necessary means of communication.

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The Avari VL™ Series solution is perfectly suited for medium to large complex mission-critical in-building communication deployments. It can overcome common and difficult challenges that are often present in these expansive deployments. The system supports all public safety LMR frequency bands, can work with technology inside, or outside of the building, and is future-proof.

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Experts in Medium to Large Complex Deployments

Key Challenges Avari   VL™ Can Overcome

Physical size, complexity, & distance

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Fiber availability & flexibility

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Multiservice & content aggregation

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Reliability & redundancy

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Scalability & future readiness

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What sets Avari’s VL™ Series Solution Apart?

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Long reach with no loss of signal quality

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Automatic digital gain control with squelch to ensure best audio quality

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No off-air BDA required

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1 Gbps Ethernet backhaul over fiber

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Flexible deployment topology with star and daisy-chain configurations​​

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Intelligent system control with fault analyzer

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03

Channelized operation with advanced software-configurable digital filters (64 channels)

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Oscillation detection and suppression

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Flexible NFPA alarm connections to local and centralized fire alarm panels over existing fiber

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System redundancy with self-healing capability

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08

Multi-band support with high power output per band​

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The Avari   VLâ„¢ Series Product Family

Public Safety Modular Digital Distribution

Centralizes, integrates, and streamlines the management and control of the entire network. Intelligently re-routes channel traffic based on analysis of faults detected.

VL-EMâ„¢

Avari VL™ Element Manager

  • Centralized control and management

  • Easy to use graphical interface

  • Built-in web server

  • 3 x 1 Gbps Ethernet interface

System Controller

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VL-DMUâ„¢

Avari VL™ Direct Master Unit

Interfaces with Base Stations (BTS) or existing Bi- Directional Amplifiers (BDA) over analog radio frequency (RF). Converts signals from analog RF to digital data packets and intelligently routes the digital signals through the digital distribution unit (VL-DUTM) or directly to the remotes. Processes up to 3 public safety RF bands simultaneously.

  • Base Station interface

  • All standards (P25, TETRA, LTE, GSM-R)

  • Modular RF sections (up to 4 bands)

  • 8 optical interfaces

  • Redundancy configurations

  • 2 x 1 Gbps Ethernet interface

  • IP66/NEMA 4 | NFPA compliant

Connects to signal source

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Avari VL™ Air Master Unit

Provides off-air interfacing to public safety donor base stations in a 1-3 band headend unit. Filters and amplifies RF signals to a composite power of up to 2W per band or 5W per band.

  • Off-air interface

  • Channelized class A operation

  • Modular RF sections (1 - 3 bands)

  • 2/5W per band uplink

  • All standards (P25, TETRA, LTE )

  • 8 optical interfaces

  • Redundancy configurations

  • 2 x 1 Gbps Ethernet interface

  • IP66/NEMA 4 | NFPA compliant

Connects to off-air signal source

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Avari VL™ Distribution Unit

Receives digital data streams over fiber from one or more host units and re-distributes the data to multiple remote units. It can also be cascaded in a multi-layer configuration for distributing to a large network of remote units.

  • Digital distribution unit

  • Small form factor

  • 8/14 optical interfaces

  • 2 x 1 Gbps Ethernet interface

  • IP66/NEMA 4 | NFPA compliant

Digital aggregation / distribution

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Avari VL™ Remote Unit

Processes up to 3 bands simultaneously. Has field upgradeable RF band modules with RF output power of 2W or 5W per band. Bands: VHF, UHF, 700, 800, 900 MHz

  • Channelized class A operation

  • Modular RF sections | 1 - 3 bands

  • 2/5 watt per band downlink

  • All standards (P25, TETRA, LTE ...)

  • Dual-fiber fed with failover operation

  • 2/4 optical interfaces

  • 2 x 1 Gbps Ethernet interface

  • IP66/NEMA 4 | NFPA compliant ​

  • For indoor and outdoor

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VL-CLKâ„¢

Avari VL™ Clock

Built-in 10MHz clock reference signal that is used to feed the same clock reference signal to two separate VL-DMUTM / VL-AMUTM units over fiber in a redundant head-end configuration. In order for automatic fail- over protection to work, the two hosts at the headend locations must be synchronized with the same clock reference.

  • 4 x 10 Gbps optical interfaces

  • 2 x 1 Gbps Ethernet interfaces

  • Built-in 10 MHz clock reference over fiber

  • Supports redundant clock source

  • Utilizes standard plug and play SFP+ optical transceivers

  • NEMA4 or Non-NEMA4 versions are available

  • FCC, UL compliant

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Reliable Emergency Communication When It Matters Most

In a crisis, every second counts. First responders depend on clear, reliable radio coverage to coordinate life-saving efforts and protect the community.

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However, radio signals often struggle to penetrate buildings—creating dangerous communication gaps. That’s where Emergency Responder Communications Enhancement Systems (ERCES) make the difference.

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The Avari VL™ Series, our public safety digital Distributed Antenna System (DAS), delivers dependable in-building coverage with high performance, high availability, and future-ready design. Built to meet evolving public safety standards, Avari ensures first responders can communicate without interruption during mission-critical events.

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​By enabling seamless emergency communications indoors, Avari helps keep first responders and the public they protect safe.

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Canada Headquarters

Avari Wireless Corporation 8618 Commerce Court Burnaby, BC V5A 4N6 Canada

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US Headquarters

Avari Wireless Inc. 1400 112th Ave SE Ste 100 Bellevue, WA 98004 USA

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UK Headquarters

Avari Wireless Limited Davidson House The Forbury Reading RG1 3EU, UK

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Phone Us

Toll Free:  +1 (833) 502-2144
Phone: +1 (778) 945-5085
Fax: +1 (778) 945-508

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Copyright ©2025 Avari Wireless. All Rights Reserved.

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