Avari VLâ„¢ Overview
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Avari VLâ„¢ 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.
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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 VLâ„¢ Series in Action
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The Avari VL-DMUâ„¢ receives radio frequency (RF) signals from donor base stations. The VL-AMUâ„¢ 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-RUâ„¢).
The optional digital distribution unit (VL-DUâ„¢) enables an extra level of flexibility in topology and redundancy architectures.
Avari VLâ„¢ Series Product Family
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Public Safety Modular Digital Distribution
VL-EMâ„¢
Avari VLâ„¢ Element Manager
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Centralized control and management
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Easy to use graphical interface
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Built-in web server
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3 x 1 Gbps Ethernet interface
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System Controller
Centralizes, integrates, and streamlines the management and control of the entire network. Intelligently re-routes channel traffic based on analysis of faults detected.
VL-DMUâ„¢
Avari VLâ„¢ Direct Master Unit
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Base Station interface
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All standards (P25, TETRA, LTE, GSM-R ...)
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Modular RF sections (up to 4 bands)
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8 optical interfaces
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Redundancy configurations
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2 x 1 Gbps Ethernet interface
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IP66/NEMA 4 | NFPA compliant
Connects to signal source
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-DUâ„¢) or directly to the remotes. Processes up to 3 public safety RF bands simultaneously.
VL-AMUâ„¢ 33/37
Avari VLâ„¢ Air Master Unit
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Off-air interface
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Channelized class A operation
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Modular RF sections (1 - 3 bands)
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2/5W per band uplink
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All standards (P25, TETRA, LTE ...)
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8 optical interfaces
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Redundancy configurations
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2 x 1 Gbps Ethernet interface
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IP66/NEMA 4 | NFPA compliant
Connects to off-air signal source
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.
VL-DUâ„¢ 8/14
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Digital distribution unit
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Small form factor
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8/14 optical interfaces
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2 x 1 Gbps Ethernet interface
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IP66/NEMA 4 | NFPA compliant
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Digital aggregation / distribution
Avari VL â„¢ 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.
VL-RUâ„¢ 33/37
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Channelized class A operation
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Modular RF sections | 1 - 3 bands
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2/5 watt per band downlink
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All standards (P25, TETRA, LTE ...)
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Dual-fiber fed with failover operation
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2/4 optical interfaces
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2 x 1 Gbps Ethernet interface
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IP66/NEMA 4 | NFPA compliant ​
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For indoor and outdoor
Avari VLâ„¢ 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
VL-DMUâ„¢
Avari VLâ„¢ Direct Master Unit
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Base Station interface
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All standards (P25, TETRA, LTE, GSM-R ...)
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Modular RF sections (up to 4 bands)
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8 optical interfaces
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Redundancy configurations
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2 x 1 Gbps Ethernet interface
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IP66/NEMA 4 | NFPA compliant
Connects to signal source
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-DUâ„¢) or directly to the remotes. Processes up to 3 public safety RF bands simultaneously.
VL-CLKâ„¢
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4 x 10 Gbps optical interfaces
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2 x 1 Gbps Ethernet interfaces
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Built-in 10 MHz clock reference over fiber
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Supports redundant clock source
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Utilizes standard plug and play SFP+ optical transceivers
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NEMA4 or Non-NEMA4 versions are available
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FCC, UL compliant
Built-in 10MHz clock reference signal that is used to feed the same clock reference signal to two separate VL-DMUâ„¢ / VL-AMUâ„¢ 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.
Avari VLâ„¢ Clock