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  • Remote access
  • Data acquisition
  • Passenger information systems
  • Passenger WiFi
  • Passenger counting systems

Key Features

  • EN 50155 TX / EN 45545
  • WiFi-ac AP/client
  • 5 Ethernet M12
  • 2 digital I/O
  • OpenVPN, IPsec
  • Isolated power
  • Option: extended input voltage range 72, 96, 110V


  • Dual-Core, 1.3GHz ARM CPU
  • 100Mbps LTE to WiFi/LAN

NB3701 CompactRail+

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


The NB3701 CompactRail+ with enhanced performance provides wireless Internet access on board. The compact device integrates a WiFi access point and further interfaces for various application like remote access, data acquisition and passenger information.

  • Description
  • Specifications
  • Accessories
  • Downloads


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 / Cellular1-2 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 / WiFiIEEE 802.11 a/b/g/n/ac up to 867 Mbps 2.4/5GHz 2x2 MIMO, access point or client
TNC connectors female supporting MIMO or standard antennas
Ethernet5 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
USBUSB 2.0 Host; USB A connector type
Digital I/O2 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
Dimensions, weightWidth 165mm (190mm width with mounting ears) x height 85mm x depth 104mm, approx. 1'400g
PowerStandard - Nominal voltages: 24VDC, 36VDC, 48VDC according to EN50155; Voltage range 24VDC-48DC -30% / +30%
Option - Nominal voltages: 72VDC, 96VDC and 110VDC according to EN50155; Voltage range 72VDC-110VDC -30% / +30%

Power Interruption Class S2: interruptions up to 10ms are tolerated, no batteries;
M12 Connector, 4 poles, A-coded male, Pin1 +, Pin3
Max. power consumption depending on model: 15W
Environment24-48VDC: Temperature range EN50155 TX (-40 °C to +70 °C) with max. 2 radio modules
72-110VDC: Temperature range EN50155 TX (-40 °C to +70 °C) with max. 2 radio modules

Conformal coating, IP40 with SIM / USB cover mounted, IP52 option
MTBF200'000h-300'000h depending on model
ComplianceCE according to 2014/53/EU (RED), 2011/65/EU (RoHS), 2012/19/EU (WEEE), 1907/2006/EC (REACH); FCC according to 47 CFR, Part 15B; Railway according to EN 50155
StandardsEN 300 328, EN 300 440-2, EN 301 489-1, EN 301 489-17, EN 301 489-24, EN 301 489-7, EN 301 511, EN 301 893, EN 55032, EN 61000-6-2, EN 50121-3-2, EN 60950-1, EN 62311, EN45545-2
Order numbers
(contact sales for more models, options or project specific adaptations)
Dual-WLAN-ac Router
LTE Router + GPS
LTE, WLAN-ac Router + GPS


Railway Accessory Starter Kit International

DescriptionThe kit consists of:

  • 110V/230V-24V (1.25A, 30W) PSU International

  • 2 Digital I/O connectors

  • 2 Antenna-Port-W

  • 2 Antenna-Port-L

  • Antenna-Roof-2LG

  • 7 antenna adapter TNC-SMA

  • Ethernet adapter M12-RJ45

  • Ethernet adapter M12-RJ45 Gigabit

Order numberAccessory-Starter-Kit-Int-Railway

Extension Modules

Extension Modules
DescriptionAll available extension modules for NetModule Routers
Data sheet

M12 Power Connector (4pol female)

M12 Power Connector (4pol female)
DescriptionM12 Power Connector
Female, 4 contacts
Order numberCon-M12-4Pol-f
Data sheet

Railway Antenna MIMO LTE + GNSS

Railway Antenna GSM/UMTS/LTE + WLAN + GPS
DescriptionEN 50155 certified antenna for railway with 3x 3m cables
Supports MIMO LTE, UMTS, GSM, GSM-R and also GNSS
Order numberAntenna-Railway-2LG
Data sheet

Railway Antenna 4x4 MIMO LTE + GNSS

Railway Antenna 4x4 MIMO LTE + GNSS
DescriptionEN 50155 certified antenna for railway with 5x 3m cables.
Supports 4x4 MIMO LTE, UMTS, GSM and also GNSS.
Order numberAntenna-Railway-4LG
Data sheet

Railway Antenna MIMO LTE + MIMO WIFI + GNSS

Railway Antenna MIMO LTE + MIMO WLAN + GPS
DescriptionEN 50155 certified antenna for railway with 5x 3m cables
Supports MIMO LTE, UMTS, GSM, MIMO WiFi 2.4/5 GHz and also GNSS
Order numberAntenna-Railway-2L2WG
Data sheet

Indoor WiFi Antenna

Indoor WiFi Antenna
DescriptionEN 50155 certified indoor antenna for railway with 3m cable
Supports WiFi 2.4/5 GHz
Order numberAntenna-Railway-Indoor-W
Data sheet

Indoor MIMO WiFi Antenna

Indoor MIMO WLAN antenna
DescriptionEN 50155 certified indoor antenna for railway with 2x 3m cables
Supports MIMO WiFi 2.4/5 GHz
Order numberAntenna-Railway-Indoor-2W
Data sheet

Railway Indoor 4x4 MIMO WiFi Antenna

EN 50155 certified indoor antenna for railway with 4x 3m cables
Supports 4x4 MIMO or dual 2x2 MIMO 2.4/5 GHz WiFi
Order numberAntenna-Railway-Indoor-4W


DescriptionConsulting, configuration services
Order numberService-Consulting-1 (1 hour)

Server License for NB3000 Line

Order NumberDescription
NB3000-Lic-SLicense for OpenVPN, DynDNS and MobileIP

Voice License for NB3000 Line

Order NumberDescription
NB3000-Lic-VLicense for voice gateway

Virtualization License for NB3000 Line

Order NumberDescription
NB3000-Lic-ViLicense for LXC (Linux Containers)


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