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Industrial Dual SIM Cellular VPN Router The R1520 router from Robustel is a versatile 4G router with 5 x Ethernet ports, GPS and E-mark certification for in-vehicle use.

Product Feature

  • Cost-effective & high performance 3G/4G router
  • Rugged design with 9 to 36Vdc power
  • “Global” 4G version available
  • E-mark certification for in vehicle use
  • Optically isolated digital IO
  • 10-bit Analogue interface for direct sensor connections
  • Supports Dual SIMs & Wifi/Ethernet as WAN
  • Cellular keep-alive and fast failover
  • Extensive range of software “apps” for enhanced functionality
  • RobustVPN – hosted service providing a “fixed IP” router
  • IPsec/OpenVPN/GRE/L2TP/PPTP/DMVPN supported
  • Extensive global certifications


The R1520 router from Robustel is a versatile 4G router with 5 x Ethernet ports,
GPS and E-mark certification for in-vehicle use.
Other hardware features include optically isolated digital inputs and outputs as
well as a 10-bit analogue input capable of interfacing directly with sensors in the
range of 0 to 24Vdc or 0 to 20mA.
R1520 also has a 2-wire RS485 interface for connection to legacy instruments with
full support for Modbus. The RS232 port features RTS/CTS lines so the product can
accommodate applications that require hardware handshaking.

Despite being cost-effective, the R1520 is a powerful router with high packet-forwarding capability – way beyond the typical requirements of LTE CAT4 networks. The Linux based Operating System, RobustOS, has been developed entirely in-house which leads to a very high standard of technical support and infrequent firmware updates due to modular nature of the OS. Many unique software innovations are built on top of RobustOS, these include:

RobustVPN – highly flexible hosted VPN service so customers can easily enjoy a “fixed IP router”

Data-Guard – invaluable failsafe in case of a system failure and runaway data usage

Smart Reboot – SMS tool to push roaming SIMs from a non-working to working state

Sniffer – run a Wireshark trace directly on the router for invaluable diagnostic information. Customers can also easily write their own applications using the extensive SDK supplied free of charge.

RCMS is Robustel’s free router monitoring service that is fully compatible with the R1520.It allows customers to see a location overview of their routers quickly and simply on a map.Features such as data usage, signal strength, current network and much more can then be viewed on a per router. Over-the-air updates are supported for Firmware, router configuration and Apps serving as essential ‘insurance’ if anything was not quite right during deployment.

For a free trial of RCMS, visit:

Cellular Interface

Number of antennas2
SIM2, Standard SIM or eSIM

Ethernet Interface

Number of ports

5 x 10/100 Mbps,

5 LAN by default, can be configured as 1 WAN + 4 LAN

WAN portSupport 802.3af & 802.3at PD feature on ETH0
Magnet isolation protection1.5 KV

Wi-Fi Interface (Optional)

Number of antennas2
Standards802.11b/g/n, supports AP and Client modes
Frequency bands2.4 GHz
SecurityWEP, WPA, WPA2
Encryption64/128 AES, TKIP
Data speed2*2 MIMO, 300 Mbps
RF output power (+/-1 dBm)802.11b                 19 dBm
802.11g                 19 dBm
802.11n (20 MHz)     18 dBm
802.11n (40 MHz)     17 dBm
Receiving sensitivity (+/-1 dBm)802.11b                 -93 dBm
802.11g                 -90 dBm
802.11n (20 MHz)     -88 dBm
802.11n (40 MHz)     -85 dBm


Type1 x DI + 1 x DO, wet contact
Isolation3 KV
Socket form2 * 3-pin 3.5 mm female socket
Level3 to 30Vdc = HIGH, 0 to 1 Vdc = LOW
Absolute maximum VDC30 Vdc(DI/DO)
Absolute maximum ADC100 mA(DI/DO)

Analogue Input

Type1 X AI (can be configured as voltage type or current type)
Voltage input range0 to 24 Vdc
Current input range4-20 mA (current-type input requires external resistance, and finally measured by voltage)
Socket form2 * 3-pin 3.5 mm female socket
Signal definitionAI,AGND

Serial Port

Type1 x RS-232 + 1 x RS-485 serial port
Socket form2 * 4-pin 3.5 mm female socket
Signal definitionRXD TXD SGND RTS CTS(RS-232)
Data+ (A),Data- (B),ground(GND);(RS-485)

Device Interface

1 x GPS interface (Optional, depending on the cellular module)
1 x 480Mbps high-speed USB2.0 interface


Reset button1 x reset button (RST button)
RTCExternal RTC clock , Backup energy storage capacitor can be maintained for 2 days
LED indicators1 x RUN, 1 x MDM, 1 x USR, 1 x RSSI, 1 x WiFi
Built-inWatchdog, Timer

Software(Basic features of RobustOS)

Network protocolsPPP, PPPoE, TCP, UDP, DHCP, ICMP, NAT, HTTP, HTTPs, DNS, ARP, NTP, SMTP, Telnet, 
VLAN, SSH2, DDNS, etc.
VPN tunnelIPsec, OpenVPN, GRE
FirewallDMZ, anti-DoS, Filtering (IP/Domain name/MAC address), Port Mapping, Access Control
ManagementWeb, CLI, SMS

App Center (Available Apps for RobustOS)

Apps*L2TP, PPTP, DMVPN, VRRP, QoS, Captive Protal, WLAN Multi AP, SNMP, Language, RCMS
*Request on demand. For more Apps please visit

Power Supply and Consumption

Connector2 pin 3.5 mm socket with lock
Input voltage9 to 36V DC
Power consumptionIdle: 100 mA@12 V
Data link:1.0 A (peak) @12 V

Physical Characteristics

Ingress protectionIP30
Housing & WeightPlastic, 250 g
Dimension105 x 90 x 46 mm
InstallationDesktop, wall mounting and 35 mm DIN rail mounting
RegulatoryCE*, FCC*, RCM*, CCC* , Telec*, JATE*, IC*, SDDPI *
CarrierPTCRB*, AT&T* , Verizon*, Rogers*, Telus*
EnvironmentalRoHS 2.0, WEEE
EMIEN 55032: 2012/AC: 2013 (CE & RE) Class B

IEC 61000-4-2 (ESD) Contact Level 2;

IEC 61000-4-3 (RS) Level 2

IEC 61000-4-4 (EFT) Level 2

IEC 61000-4-5 (Surge) Level 2

IEC 61000-4-6 (CS) Level 2

IEC 61000-4-11 (DIP) Level 2

(* :In progress)

Name Type Version Release Date
R1520 Datasheet Datasheet V1.0.1 24 July 2020


Router Type LTE Router
Frequency Bands
4G* Global: B1/ B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28;B38/B39/B40/B41 AU: B1/B2①/B3/B4/B5/B7/B8/B28; B40 EMEA: B1/B3/B7/B8/B20/B28A CN: B1/B3, B38/B39/B40/B41
3G Global: WCDMA B1/B2/B4/B5/B6/B8/B19 AU: WCDMA B1/B8 EMEA: WCDMA B1/B8 CN: WCDMA B1, TD-SCDMA B34/B39, CDMA2000 1x/EVDO BC0
2G Global: B2/B3/B5/B8 AU: B2/B3/B5/B8 EMEA: B3/B8 CN: B3/B8
Operating Temperature -25 to +70 °C
Storage Temperature -40 to +85 °C
Relative Humidity 5 to 95% RH

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