Who is Avari® Wireless?
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.



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
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
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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-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.
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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






