NB3701 Compact Rail+ Series

NB3701 Compact Rail+ Series

High-Performance EN 50155 Router with LTE, WiFi 802.11ac and GPS


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The NB3701 is the preferred communication module for railway and public transport applications. Typical applications are remote management, condition monitoring, data acquisition as well as passenger information systems and digital signage. Thanks to its unique port-based subnetting feature, the NB3701 is able to separate different application networks, thus avoiding interferences and guaranteeing dedicated communication paths. Quality of Service support allows to prioritizing the traffic to avoid that less important tasks are blocking high priority data. The NB3701, operating as communication gateway of the vehicle, enables access to remote stations for any kinds of applications in the Internet, but also to Intranet sites which can be connected via its powerful VPN protocol suite. Multiple devices can directly be attached to the NB3701 by using the integrated 5 port Ethernet switch.

Equipped with multiple UMTS/LTE modules the total bandwidth can be extended to the needs of the applications. Especially in passenger Wi-Fi applications the increased total throughput gives a better user experience.

The router software is based on well proven components including an embedded Linux operating system and standard communication protocols. The device is administrated via web browser or command line. Selfprovisioning for new software or new configuration is possible. The device can be configured remotely by customer programs via a powerful application interface.

The router is qualified for operating under harsh environmental conditions defined by EN 50155, supporting the temperature range TX (-40°C to +70°C, +85°C for 15 minutes). The dual SIM feature and the sophisticated WAN link manager are offering high availability of network connections between multiple network providers.
The device is now also available with extended input voltage (72, 96, 110V).


  • Mobile / Cellular;- 1-2 Multimode LTE, UMTS and GSM module with seamless hand-over
    – 4G – LTE/FDD Bands: B1(2100), B3(1800), B5(850), B7(2600), B8(900), B20(800)
    – 3G – DC-HSPA+/UMTS: B5(850), B8(900), B2(1900), B1(2100)
    – 2G – EDGE/GPRS/GSM: B5(850), B8(900), B3(1800), B2(1900)
    – Data rates: LTE max. 100 Mbps downlink / 50 Mbps uplink (DC-HSPA+ 42/5.76), MIMO
    – TNC female antenna connectors supporting MIMO or standard antennas
    – SIM slots: 2 Mini-SIM ISO/IEC 7810:2003, ID-000
  • WLAN / WiFi
    – IEEE 802.11 a/b/g/n/ac up to 867 Mbps 2.4/5GHz 2×2 MIMO, access point or client
    – TNC connectors female supporting MIMO or standard antennas
    – Ethernet 5 port Ethernet switch 10/100 Mbps, auto MDX; M12 connectors 4 poles D-coded female
    – GPS / GNSS GPS/GLONASS data server with JSON or NMEA data stream, tracking sensitivity -154dBm (typical); TNC connector, support for active and passive antennas
  • Optional: GPS/GLONASS/BeiDu/Galileo, –160 dBm, 72-channel, 2m accuracy
  • USB USB 2.0 Host; USB A connector type
  • Digital I/O 2 digital inputs, level 0 (not set): 0-4.0 VDC level 1 (set): 7.2-40 VDC
  • 2 digital outputs, 0-60 VDC/1A, maximum switching capacity: 60 W
  • M12 8 poles A-coded female

Ordering Information

Part NumberDescription
NB3701-2WacDual-WLAN-ac Router
NB3701-L-GLTE Router + GPS
NB3701-LWac-GLTE, WLAN-ac Router + GPS