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Class A or Class B Integrated Public Safety DAS for LMR and FirstNet

Regions: United States
LMR: 700/800 MHz
Cellular Bands: 2, 4, 12, 14

A code compliant ERCES, SHIELD EXTEND offers building owners the fastest pathway to receiving their certificate of occupancy (CoO). The system combines industry-leading ease of installation, performance, and scalability with unmatched remote system monitoring and management to ensure reliable LMR and FirstNet connectivity indoors.

Peace of Mind for Building Owners and Installers

SHIELD EXTEND revolutionizes what it takes to install an emergency responder communication enhancement system (ERCES), making it quicker and less costly than ever before. With its advanced automation features, businesses can get a system installed, receive Authorities Having Jurisdiction (AHJ) approval, attain their CoO, open their doors, and start making money faster than with any other solution.

  • Class A and Class B configuration flexibility
  • Reliable coverage for LMR 700/800 MHz and channelized FirstNet Band 14
  • Scalable Power-over-Ethernet (PoE) architecture to support enterprise environments
  • Nextivity proprietary IntelliBoost software provides automatic calculation of system parameters (no manual testing required!)
  • Built-in, end-to-end remote system monitoring and management via Nextivity WAVE Portal
  • Fiber expansion capabilities for campuses, multi-building facilities, and high-rises

Removing the Guesswork

Nextivity proprietary IntelliBoost software inside SHIELD public safety solutions enables them to automate system parameters that no other ERCES can do. By automatically calculating and setting system parameters, SHIELD EXTEND allows installers to deploy an ERCES faster and with more confidence it will pass the first AHJ inspection than with other solutions.

  • Real-time monitoring of environmental changes and automatic adjustments (if necessary) to ensure consistent, reliable performance
  • Automatic setting/optimization of uplink (UL) gain (no additional testing equipment or calculation guessing)
  • Automatic calculation of path loss, allowing for different values according to network requirements
  • Isolation calculated in real-time and automatically set at 20 dB per NFPA 1221 (the system also allows for different values according to local ordinances)
  • Downlink (DL) gain automatically adjusted to achieve required value

System Components

Management Unit

The management Unit (MU) is the central point of the system. In addition to accepting and distributing power from the SHIELD EXTEND Battery Backup Unit (BBU), the MU controls and monitors all system components, including the Network Unit (NU), Coverage Unit (CU), and accessory components. System performance analytics are available in the Nextivity WAVE Portal or WAVE PRO app.

Model Number: F40-0E

Network Unit

With its two donor ports, the NU processes and digitizes the off-air LMR and FirstNet donor signals and distributes those signals to the CUs. Each NU can support and power up to six CUs via PoE.

Model Number (Class A): F42-67ENU
Model Number (Class B): F42-67ENUB

Coverage Unit

The CUs rebroadcast LMR and FirstNet donor signals to local service antennas throughout the facility. They are self-configuring and self-optimizing, enabling faster system deployment and certification.

Model Number (Class A): F41-8XCU
Model Number (Class B): F41-8XCUB

SHIELD EXTEND Battery Backup Unit

The Battery Backup Unit (BBU) provides constant direct current and battery charging capabilities for SHIELD EXTEND systems. In the event of a power failure, the BBU allows SHIELD EXTEND to maintain peak operation for up to 12 hours. In addition to being NEMA 4 rated and listed to UL 2524, the BBU supports four 12-volt lead-acid batteries and includes accessories for wall mounting and cabling for connecting to the MU.

Model Number: F43-00

SHIELD EXTEND Fiber Range Extender (Optional)

Ideal for campuses, multi-building facilities, and high-rises, the SHIELD EXTEND Fiber Range Extenders (FRE) increase the distance between the SHIELD EXTEND NU and CU up to nearly one mile. In addition to supporting copper cable to power up CUs remotely, FREs work in pairs and are sold as a kit that includes two units—one NU side and one CU side—with each pair supporting up to two CUs.

Model Numbers:
NU Side: F40-0XNU
CU Side: F40-0XCU




Class A or Class B Integrated Public Safety DAS for LMR and FirstNet

The SHIELD EXTEND integrated public safety DAS sets a new standard for performance, ease of installation, and scalability for emergency communication systems. In addition to delivering reliable in-building 700/800 MHz LMR and FirstNet coverage that keeps first responders and emergency personnel connected, this code compliant solution features PoE architecture and fiber expansion capabilities to support structures the largest structures. The system also offers advanced software capabilities – from Nextivity proprietary IntelliBoost technology – that allows SHIELD EXTEND to automate system settings and parameters without expensive or hard-to-use testing tools. This streamlined process speeds up installation times, allowing buildings owners to get their systems approved by AHJs and receive their CoO as fast as possible.

Radio Performance
Bands2 (LTE)4 (LTE)12 (LTE)14 (LTE)700 (LMR)800 (LMR)
Frequency Range, Downlink (MHz)1930–19902110–2155728–746758–768768–775851–861
Frequency Range, Uplink (MHz)1850–19101710–1755699–716788–798798–805806–816
TechnologyLTE–20 MHzLTE–20 MHzLTE–10 MHzLTE–10 MHzP25/AnalogP25/Analog
DL (Downlink) Output Power (dBm)242424243030
UL (Uplink) Output Power (dBm)232321232626
Minimum Input level (DL/UL) dBm-100 / -90-100 / -90-100 / -90-100 / -90-100 / -90-100 / -90
Maximum Input level (DL/UL) dBm-20 / 0-20 / 0-20 / 0-20 / -35-20 / -27-20 / -27
System maximum gain (dB)100100100100100100
Noise Figure at max gain (dB)555555
Return loss (dB)-8-8-8-8-8-8
System Group Delay @ 12.5 kHz (usec) (Class A)282828282828
System Group Delay @ 100 kHz / 150 kHz (usec) (Class B)15 / 13.615 / 13.615 / 13.615 / 13.615 / 13.615 / 13.6
Physical Specifications
Width Height Depth Weight
NU 12.36 in 14.61 in 4.29 in 15.43 lb
CU 11.18 in 13.50 in 3.50 in 12.13 lb
MU 10.63 in 12.20 in 4.80 in  8.82 lb
Connections (NU)Connections (CU)
2x Donor antenna ports — Type-N female connectors1x Server antenna port — Type-N female connectors
2x Donor antenna ports — Type-N female connectors2x RJ45 Proprietary Gigabit link, 300 ft range from NU to CU
1x RJ45 LAN management output port (10/100 Fast Ethernet) 
1x SFP+ Optical port, 5 Gbps, up to 6500 ft range from NU1 to NU2 

Optional Components

SHIELD Remote Annunciator

The Remote Annunciator Panel (RA) provides automatic supervisory signals for malfunctions of SHIELD EXTEND solutions. In addition to being NEMA 4 rated and complying with NFPA and IFC fire codes, the RA features PoE architecture for quick installation and alarm configuration. The RA also offers real-time component monitoring through the WAVE Portal.

Model Number: F42-10R-100


SHIELD Emergency Power-Off Switch

The Emergency Power-Off Switch (EPO) instantaneously shuts down a SHIELD EXTEND system from a single point, eliminating the risk of combustion caused by electricity or static. The EPO is designed to prevent inadvertent operation and can be installed in any location designated by the local AHJ. In addition to being NEMA 4 rated and complying with NFPA and IFC fire codes, the EPO features PoE architecture for quick installation and configuration.

Model Number: F42-10E-100


SHIELD Active Server Antenna

The Active Server Antenna is an active multi-frequency, omnidirectional antenna for emergency communication solutions that require monitoring capabilities at the component level. In addition to being designed for hard cap and false ceilings, the Active Server Antenna features an N-type female connector and rugged IP20 grade electronics. The component is ideal for SHIELD EXTEND installations, providing real-time antenna monitoring capabilities through the Nextivity WAVE Portal.

Model Number: A33-10A-100

CEL-FI Active Server Antenna

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