Who is Avari® Wireless?
Reliable in-building communication is critical for first responders performing time-sensitive, mission-critical operations that protect public safety. However, modern building materials often weaken or block wireless signals, making indoor communication unreliable or impossible. To overcome this, Emergency Responder Communication Enhancement Systems (ERCES), typically implemented using Distributed Antenna Systems (DAS), are deployed to ensure consistent coverage throughout a building.​
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The Avari VL™ Series Distributed Antenna System (DAS) is purpose-built for medium to large, complex in-building public safety deployments. It addresses the unique challenges of expansive environments such as high-rises, hospitals, campuses, and transportation facilities. Supporting all public safety LMR frequency bands, the system seamlessly integrates with signal sources both inside and outside the building and is designed to be scalable and future-ready.
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Tested, approved, and certified to UL 2524, the Avari VL™ Series delivers the performance, reliability, and compliance required for mission-critical communications.
Experts in Medium to Large Complex Deployments
Key Challenges Avari VL™ Can Overcome
Physical size, complexity, & distance
Fiber availability & flexibility
Multiservice & content aggregation
Reliability & redundancy
Scalability & future readiness
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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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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Multi-band support with high power output per band​
The Avari VLâ„¢ Series Product Family
Public Safety Modular Digital Distribution
VL-EMâ„¢
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.
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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
System Controller
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.
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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
VL-AMUâ„¢ 33/37
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.
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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
VL-DUâ„¢ 8/14
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.
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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
Digital aggregation / distribution
VL-RUâ„¢ 33/37
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
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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
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-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.
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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