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Products Unlicensed Radio Point-to-Point IP/SDH/SONET Radios M900S 900 MHz NLOS Wireless Ethernet System
M900S_0606 M900S 900 MHz NLOS Wireless Ethernet System

  • Up to 20-mile range, 18 dB fade margin     
  • 3 Mbps usable subscriber throughput     
  • 4 non-overlapping channels, 6 MHz apart     
  • Dual polarized antenna, external antenna connector    
  • Robust interference rejection (ARQ) 

The M900S Series point-to-multipoint wireless broadband platform utilizes the advantages of the 900 MHz license-exempt spectrum and delivers up to 3 Mbps to the subscriber. Ideal for non-line-of-sight (NLOS) deployment, this fully integrated outdoor system includes internal dual polarized antennas as well as connectors for optional external antennas.

Download the M900S 900 MHz NLOS data sheet - PDF Version 

What's Included

  • AP or SU radio 
  • Standard Power Supply 
  • Power-over-Ethernet (PoE) Junction box 
  • Mounting bracket for wall/pole 

** EXT model includes only a connector for an external antenna and does not include an integrated antenna


The M900S Series was designed for deployment in areas where foliage and other obstructions obscure line-of-sight between the access point (AP) and subscriber unit (SU). The system offers excellent receiver sensitivity and best-in-class overall system gain for outstanding non-line-of-sight (NLOS) range. The subscriber can expect typical NLOS performance of up to 6 miles or beyond*. Use of external antennas increases range and fade margin even farther. In addition, Spread Spectrum modulation promotes resistance to multipath fading. Combining SMARTPolling with Spread Spectrum modulation results in maximum cell performance.


Antenna Flexibility

The M900S AP and SU each include an integrated 10 dBi dual polarized patch antenna as well as a connector for optional external antennas. The lower cost M915S-SU-EXT features only a connector for an external antenna. External antenna options include omni antennas for the AP and yagi-style antennas for both the AP and SU. The auto-sensing feature on the M900S SU allows the firmware to choose the antenna with the strongest signal, or the user can manually select either the internal or external antenna.


The system delivers up to 3 Mbps and utilizes patent pending SMARTPolling™ algorithm to dynamically and adaptively poll subscriber units, ensuring the lowest latency for active subscribers.

Channel Flexibility

The system is configured with four channels, each 6 MHz apart. The user can redefine channels by selecting frequencies in single MHz increments. The SU scans all channels until it associates with a properly configured AP. This allows redundancy of APs as well as a simple and quick method to switch channels on an entire sector.

Interference Mitigation

The M900S Series offers powerful resistance to interference with the Automatic Repeat Request (ARQ) feature which automatically retransmits packets to mask RF errors to higher layer protocols. In addition, the system includes interference mitigation tools such as software selectable dual polarity antennas, automatic SU power leveling, and threshold control.

Integrated Design

The M900S radios are fully weatherized outdoor units featuring Power-over-Ethernet (PoE) designed for quick deployment and easy installation.

Management Features

The system offers remote and local management via Telnet, SNMP and HTTP via browser. Powerful tools such as site survey and upstream/downstream CIR/MIR controls allow operators total control and flexibility in managing their network.


Frequency of Operation902 MHz to 928 MHz
User Data Throughput3 Mbps
Receiver Sensitivity
(BER 10-6)
-90 dBm typical
RF Power OutputM900S AP & SU: +26 dBm Max Setting, -4 dBm Min Setting
M915S-SU-EXT: +26 dBm Max Setting, 0 dBm Min Setting
LED Indicators7 LEDs including 4 RSSI
Modulation FormatDirect Sequence Spread Spectrum (DSSS) with RAKE
Access MethodTDD with SMARTPolling
Maximum SUs per AP126
Configuration/ManagementTelnet, SNMP (via AP), TFTP, HTTP
Internal AntennaM900S AP & SU: Integrated 10 dBi 60° X 60° patch dual polarized (HPOL/VPOL)
Internal Antenna PolarizationHorizontal / Vertical (Software Switchable)
External Antenna ConnectionReverse Polarity SMA (RP-SMA)
Omni Antenna** (Optional)8.5 dBi 360° X 10° (VPOL) - Comtelco Part # BS915XL7** (Requires N-SMA RP adapter)
Yagi Antenna** (Optional)8 dBi 70 ° X 90 ° (VPOL or HPOL) - Trango part # AD900-8Y-RP** (comes with N-SMA RP adapter)
Yagi Antenna** (Optional)15 dBi 30° X 30° (VPOL or HPOL) - Cushcraft part # PC9013N** (Requires N-SMA RP adapter)
Physical Interfaces10/100 Ethernet Autosensing, Serial Port (RJ11)
Power MethodPower-over-Ethernet (PoE Injector JBox included)
Voltage Limits10.5 VDC – 24 VDC
Enclosure TypeM900S AP & SU: All-weather, powder coated, cast aluminum with polycarbonate radome
M915S-SU-EXT: All-weather ABS
Temp Range-40° to 60° C (-40° to 140° F)
Radio DimensionsM900S AP & SU: 12.5" x 8" x 2.75"
M915S-SU-EXT: 15" x 7.4" x 6.1" 
Radio WeightM900S AP & SU: 4 lbs.
M915S-SU-EXT: 1.5 lbs.

* Non-line-of-sight range and throughput may vary due to antenna height, leaf density, moisture content, and other environmental factors.

** NOTE: These external antennas require a Reverse Polarity SMA MALE to Standard N MALE-50 OHM RG142B/U Coax Adapter