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Atlas 4900: 4.9 GHz Wireless Ethernet Bridge (For Licensed Public Safety)

Atlas 4900™

4.9 GHz Ethernet Link for Licensed Public Safety

  • 4.9 GHz Public Safety Band
  • 45 Mbps of sustained throughput
  • OFDM: Orthogonal Frequency Division Multiplexing
  • Up to 30-mile range
  • Adaptable Rate Modulation
  • ARQ and FEC for interference mitigation

The Atlas P4900M is a rugged, outdoor, point-to-point wireless backhaul link that delivers sustained throughput up to 45 Mbps in the 4.9 GHz licensed public safety band (4940-4990 MHz). This high-performance OFDM radio system is an ideal backhaul solution for long-range data connectivity and IP-video applications for public safety agencies and other 4.9 GHz license holders to build secure, interference-free wireless communications infrastructure with best-in-class features and performance.

Product Highlights

Performance & Flexibility

The Atlas P4900M is a carrier grade, PtP network backhaul solution that delivers up to 45 Mbps using the 4.9 GHz licensed band. The P4900M uses a contention-free point-to-point protocol and user-selectable data rates of 6, 12, 18, 24, 36, 48 and 54 Mbps. Outstanding features include electronically switchable dual-polarized antennas, adaptable rate modulation, and automatic retransmit request (ARQ). Packet aggregation allows superior FTP performance over long transmission ranges.

Antenna Options

The P4900M is available in three versions including two with integrated dual polarized antennas (18 or 22 dBi) as well as a connectorized version for external antennas.

Compact/Rugged Design

The P4900M is designed to withstand the harshest environments, encased in a heavy-duty aluminum housing. These durable fully weatherized outdoor units offer a small footprint and operate from -40° to 140° F. Radios are powered using Power-over-Ethernet (PoE adapter) ensuring ease of installation and quick deployment.

Security and Authentication

The Atlas Series features MAC level address authentication, 128-bit proprietary encryption, over-the-air data scrambling, and two-level password control via SSL for secure operation.

Management Features

The Atlas Series enables remote and local management via Telnet, SNMP and HTTP via browser. Powerful tools such as site survey, asymmetrical bandwidth control, and remote temperature and input voltage measurements allow operators total control/flexibility to monitor and manage their network. The radios also feature a built-in LED alignment tool and a universal mounting bracket to minimize deployment costs.

Compatibility / Range Chart
Part Number Model Type Antenna Range / Fade Margin
5 Mbps 45 Mbps
Atlas P4900M-INT-18 Radio w/ integrated antenna
(Layer-2 Bridge)		 Integrated, 18 dBi 10 miles
12 dB		 1 miles
11 dB
Atlas P4900M-INT-22 Radio w/ integrated antenna
(Layer-2 Bridge)		 Integrated, 22 dBi 20 miles
14 dB		 3 miles
10 dB
Atlas P4900M-EXT Connectorized radio
(Layer-2 Bridge)		 External, 27 dBi 30 miles
19 dB		 7 miles
10 dB


4.9 GHz License Guidelines

State and local government entities that provide public safety services are eligible to apply for a 4.9-GHz license. Private entities that provide support services for public safety (such as private service providers), may be eligible for sharing agreements with license holders. The 4.9 GHz band is shared by all licensees, who must coordinate usage of the band with other licensees within their areas of authority.

4.9 GHZ BAND FOR SUPPORT OF PUBLIC SAFETY SERVICES

In 2003, the U.S. Federal Communications Commission (FCC) allocated 50 MHz of spectrum in the 4.9 GHz band to public safety services. Public safety agencies can use this 4.9 GHz band to implement wireless networks with advanced services for the transmission of mission-critical information such as streaming video, data access, maps, and missing person images. The FCC intended to accommodate a variety of new broadband applications such as high-speed digital technologies and wireless LANs for incident scene management, dispatch operations, and vehicular operations.

All state and local government entities that provide public safety services (defined as being focused on the protection of the safety of life, health, or property) are eligible to apply for a 4.9 GHz license. Entities that do not meet these eligibility requirements, but that provide services in support of public safety (for example, private infrastructure companies), can negotiate sharing agreements with license holders.

For the complete text of the FCC MEMORANDUM OPINION AND ORDER AND THIRD REPORT AND ORDER, click here [Adobe PDF].

4.9 GHz LICENSING

A 4.9 GHz band license gives the licensee authority to operate on any authorized channel in this band within the applicant's legal jurisdiction (city, county, state, etc.) The 4.9 GHz band is shared by all licensees, who must coordinate usage of the band with other licensees within their areas of authority. Licenses are granted for a term of 10 years.

The license gives authority to construct and operate:

  • Any number of wireless links or base stations anywhere within the area authorized by the license
  • Base and mobile units, including portable and handheld units