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Avari   VL    Series

Reliable In-Building Communications
For When You Need It Most



Avari   VL™ Overview


Avari VL™ is a digital transport-based Emergency Responder Communications Enhancement System (ERCES). This advanced Digital Distributed Antenna System (DAS) provides a reliable, high-performance, and high-availability system designed to support both current and future public safety communication requirements.

The Avari VL solution has a flexible modular architecture – headend units that can accept base station or off-air feeds, an optional digital aggregation or distribution unit, and medium power remote units (VL-RU). The system supports DMR, TETRA, P25 Phase I and II, GSM-R, LTE, and FirstNet via software configurable upgrades and pluggable RF modules.

Avari   VL™ Series in Action


The Avari VL-DMU receives radio frequency (RF) signals from donor base stations. The VL-AMU is an integrated off-air headend unit that is designed for off-air interfacing to public safety base stations.


Both hosts convert the RF signal into digital packets and then deliver the content to the medium-powered remote units (VL-RU).


The optional digital distribution unit (VL-DU) enables an extra level of flexibility in topology and redundancy architectures.

DAS Diagram.jpg

Avari   VL™ Series Product Family


Public Safety Modular Digital Distribution
VL-EM (Console) NEW-01_edited_edited.png

Avari VL™ Element Manager

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

  • Centralized control and management

  • Easy to use graphical interface

  • Built-in web server

  • 3 x 1 Gbps Ethernet interface

System Controller


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-DU™) 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

VL-DMU (Host) NEW-01_edited.png
VL-AMU 33 and 37 (airHost)2-01_edited.png
VL-AMU™ 33
VL-AMU™ 37

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

VL-DU™ 8
VL-DU™ 14

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

VL-DU 8 and 14 NEW-01_edited_edited.png
VL-AMU 33 and 37 (airHost)2-01_edited.png
VL-RU™ 33
VL-RU™ 37

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


Avari VL™ Clock

Built-in 10MHz clock reference signal that is used to feed the same clock reference signal to two separate VL-DMU™ / VL-AMU™ 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

VL-CLK NEW-01_edited.png

Avari   VL™ Series Technical Differentiators


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