Dual RS232

Connect multiple industrial devices with dual RS232 connectivity

Dual SIM Link

Dual SIM link backup and ICMP detection for the ultimate in industrial redundancy.

3G Shutdown Ready

The perfect ‘instant connectivity’ solution for legacy 3G industrial devices, data loggers or utility meters.

4G/LTE Cat-4 Speeds

Future proof your industrial deployments with LTE Cat-4 speeds up to 150Mbps.

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The R1500 is the latest industrial IoT gateway from Robustel. Providing high-speed 4G/LTE cellular connectivity for remote industrial devices. The R1500 houses a powerful LTE Cat-4 module inside a compact, rugged, flame retardant casing with 2x RS232 Serial Ports and Dual SIM Card slots for redundancy.


  • RobustOS + SDK + App
  • IPsec/OpenVPN/GRE/L2TP/PPTP/DMVPN and various VPNs
  • Supporting double cards link backup and ICMP detection
  • Supporting SMS, Email, SNMP Trap and RobustLink
  • Event alarms
  • Supporting Modbus RTU to TCP、Modbus Master
  • Supporting TCP client/server, UDP and virtual serial ports
  • Supporting IP Pass-through
  • DHCP server
  • Supporting RobustVPN cloud platform, providing easy and safe remote access for PLC and other industrial devices
  • Supporting RobustLink M2M centralized management platform, real time monitoring device network status and counting device flow
  • Supporting Web、CLI、USB、SMS and RobustLink to upgrade firmware
  • Powerful industrial design (9~36V DC input voltage, supporting desktop placement, wall mount or rail mount)
Cellular Interface
Number of antennas 2 (MAIN + AUX)
Connector SMA-K
SIM 2 (3 V & 1.8 V)
Ethernet Interface
Number of ports 1 x 10/100 Mbps



Serial Interface
Number of ports 2 x RS-232
Connector DB9
Signal TxD, RxD, GND, CTS, RTS, DSR, DTR
Baud rate 300bps to 115200bps
LED indicators

1 x RUN,1 x MDM,1 x USR,3 x RSSI

Network indicator (link + rate)

Built-in RTC, Watchdog, Timer
App Center (Available Apps for RobustOS)
Apps* Language, RobustLink
*Request on demand. For more Apps please visit www.robustel.com.


Software (Basic features of RobustOS)
Network protocols PPP, PPPoE, TCP, UDP, DHCP, ICMP, NAT, HTTP, HTTPs, DNS, ARP, NTP, SMTP, Telnet, SSH2, DDNS, etc.
VPN tunnel IPsec, OpenVPN, GRE
Management Web, CLI, SMS
Serial port

Transparent, TCP Client/Server, UDP,

Modbus RTU Gateway

Power Supply and Consumption
Connector 2-pin 3.5 mm
Input voltage 9 to 36V DC
Power consumption

Idle: 80 mA@12 V

Data link: 450 mA (peak) @12 V


Physical Characteristics
Ingress protection IP30
Housing & Weight Plastic, 300 g
Dimensions 118 x 97.5 x 28.5 mm
Installations Desktop, wall mounting and DIN rail mounting


Regulatory CE, Telec, RCM
Environmental RoHS 2.0, WEEE




LTE Gateway

Air Interface



Frequency Bands

EMEA: B1/B3/B5/B7/B8/B20/B28A; B38/B40/B41

AU: B1/B2/B3/B4/B5/B7/B8/B28; B40



EMEA: B1/B5/B8

AU: B1/B2/B5/B8



AU: B2/B3/B5/B8

Operating Temperature

-40 to +75 °C

Storage Temperature

-40 to +85 °C

Relative Humidity

5 to 95% RH

*For more information about 4G frequency bands in different countries, please contact your Robustel sales representative.

All Robustel Firmware and RobustOS Apps are now available to download from the App Centre section of RCMS Cloud.

If you don’t already have access to RCMS you can create a free account at https://rcms-cloud.robustel.net/rcms/index