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    Kwun Tong, Hong Kong


MLis MLB G4203 2/4 WLAN+LTE Industrial Wireless IIoT Field Router

The IoT router MLB-G4203-2 series brings serial and wireless LAN data to the cellular network. It supports LTE/NBIoT to wireless LAN redundancy and LTE/WLAN auto offload to optimize network performance. The RS232/422/485 port connects to meters, sensors, or Modbus RTU devices to send data to the remote cloud center over the cellular or WLAN network by Modbus TCP or Secured MQTT (MQTTS).


Your ability to hear, be heard and be understood in any situation is essential. IC-EDGE™ systems are used in the world’s most demanding and challenging environments, due to The MLB-G4203-2 series is a smart wireless LAN router for serial devices. To safeguard cybersecurity, security features such as Firewall, OpenVPN, GRE tunnel are supported. The embedded MQTTS and RESTful API enables instant public cloud integration such as AWS or Azure. The private cloud platform ThingsMaster and ThingsMaster OTA can also be set up for an instant and secured access to receive data or manage devices remotely.



Dual Radio 4G/LTE/NBIoT + Wi-Fi Wireless Networkz

  • LTE Cat.4, 2T2R MIMO provides 150M downlink and 50M uplink
  • 4G/3G/2G full cellular network compatibility
    – LTE-E: Europe Band
    FDD B1/3/7/8/20/28A
    – LTE-G: Global Band
    LTE: FDD B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28
    LTE: TDD B38/B39/B40/B41
    WCDMA: FDD B1/B2/B4/B5/B6/B8/B19
    GSM: B2/B3/B5/B8
  • IEEE 802.11b/g/n for 2.4G 2T2R MIMO delivers up to
  • 300Mbps throughput

Support NBIoT + M1

  • LTE FDD: B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B26/B28
  • LTE TDD: B39 (For Cat M1 Only)

Serial Communication & High Throughput Data Switching

  • RS232/422/485 full functions for serial over LTE/NBIoT/WiFi/Ethernet data switching
  • 2 port Ethernet supports routing and bridging mode
  • Modbus RTU to Modbus TCP Conversion
  • Modbus Log to collect sensor data
  • Modbus Write Single Coil, Register to configure sensor parameters
  • Connect up to 25 sensors in one RS485 chain
  • DLMS/COSEM protocol to connect power meters


Enhanced Cyber Security & Redundancy

  • Firewall for inbound/outbound traffic
  • OpenVPN (server/client)
  • L2TP with PPP, PAP, CHAP(LCP, IPCP), GRE tunnel
  • HTTPs/SSH secure login
  • MQTTS with TLS encryption and X.509 authenticationTACACS+ multi-user authentication for privileged user management

Industrial IoT LAN & Cloud Management

  • Various configuration paths, including CGI WebGUI, CLI, SNMP and RMON*
  • 1:1 NAT, port forwarding and NAPT for local traffic protection
  • ARP response over 802.2 LLC SNAP
  • Support SNMPv3 and entity-MIB (RFC4133), MIB II(RFC1213)
  • NTP v3 time managementWoMaster Software Utilities
    – NetMaster: Network Management System with VLAN visualization* and ERPS* Ring
    -ViewMaster: Configuration Management
    -ThingMaster: Interactive monitoring dashboard by Modbus Tag to collect data from Modbus devices
    -ThingMaster OTA: Realtime map showing the status, signal strength, location of the remote devices, over-the-air batch device registration, configuration and firmware upgrade*, alerts on critical events to prevent downtime
  • Support MQTTS protocol, ready to use AWS/Azure and Private Cloud Agent for cloud management
  • LLDP* for topology control, auto-topology drawing
  • USB for easy field configuration and firmware update
  • Diagnostic tool includes Ping, TFTP, SNMP Trap, E-mail Alert and System Log

Rugged Design for Wayside Surveillance, ITS Application

  • Effective heat dissipation design for operating in -40~70oC environments
  • CE Marking
  • IEC61000-6-2/IEC61000-6-4 heavy industrial EMC compliance


Model     MLB-G4203-2 series
Standard     3GPP Release 11 Long Term Evolution (LTE), fallback 3GPP Release     7,8,9 for HSPA/UMTS

IEEE 802.11b/g/n for Wireless LAN

IEEE 802.11i for Wireless Security

IEEE 802.3 10Base-T Ethernet

IEEE 802.3u 100Base-TX Fast Ethernet

Ethernet Port     2 x 10/100Base-TX RJ45, Auto Negotiation, Auto MDI/MDI-X

Router Mode: 1 WAN + 1 LAN, Bridge Mode: 2 LAN

System LED     1 x Power: Green ON

1 x SYS: Ready: Green On, Firmware Updating: Green Blinking

1 x Ra: 4G connection: Green On, 2/3G connection: Green Blinking,     disconnected: Off

1 x Rb: AP mode: Green On, Station mode connected: Green Blinking,     Station mode/radio disable: Off

1 x Serial Port: Activity: Green Blinking

Reset     System Reset(2~6 Seconds) / Default Settings Reset(over 7 Seconds)
SMA Socket     Up to 4 x RP-SMA Female (without Nylok)

ANT1/3 for Wi-Fi 2T2R, ANT2/4 for LTE 2T2R (Main/Div)

SIM Socket     1x Nano SIM
Micro SD     1x for field diagnostic data logging
Power Input      6-Pin Removable Terminal Block Connector

  • 2 Pin for Power (V+,V-)
  • 2 Pins for DI with isolation
    • High: DC 2~30V
    • Low: DC 0~1V
  • 2 Pins for 1x DO: 0.1A/30V with isolation
Serial     1x RS232/422/485, DB9 Female
Cellular Properties (LTE CAT.4)
Standard     GSM/GPRS/EDGE 3GPP Release 6

UMTS/HSPA 3GPP Release 8

LTE 3GPP Release 11

Data Rate     LTE Cat.4:

GPRS: DL: Max. 85.6 kbps, UL: Max. 85.6 kbps

EDGE: DL: Max. 236.8 kbps, UL: Max. 236.8 kbps

HSPA: DL: Max. 42 Mbps, UL: Max. 5.76 Mbps

LTE-FDD: DL: Max. 150 Mbps, UL: Max. 50 Mbps, 2×2 DL MIMO

LTE-TDD: DL: Max. 130 Mbps, UL: Max. 35 Mbps, 2×2 DL MIMO

Band Information: LTE-E     LTE: FDD B1/3/7/8/20/28A

WCDMA: FDD B1/B5/B8 (2100/850/900MHz)

GSM: B3/B8 (1800/900MHz)

Band Information: LTE-G     LTE:FDD B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28

LTE: TDD B38/B39/B40/B41

WCDMA: FDD B1/B2/B4/B5/B6/B8/B19

GSM: B2/B3/B5/B8

LTE Default Antenna     Frequency: 704~960/1710~2690 MHz

Gain: 2 dBi

Dimension: 161xΦ13 mm

Cellular Properties (NBIoT+CAT M1)
Standard     EGPRS 3GPP Release 6

LTE 3GPP Release 13

Data Rate     Cat M1: Max. 375Kbps (DL), Max. 375Kbps (UL)

Cat NB1: Max. 32Kbps (DL), Max. 70Kbps (UL)

EDGE: Max. 296Kbps (DL), Max. 236.8Kbps (UL)

GPRS: Max. 107Kbps (DL), Max. 85.6Kbps (UL)

Band Information     Cat M1/Cat NB1:

LTE FDD: B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B26/B28

LTE TDD: B39 (For Cat M1 Only)


WiFi Properties
Standard     IEEE 802.11b/g/n,  Up to 2T2R MIMO
Data Rate     802.11b: 11Mbps / 802.11g: 54Mbps / 802.11n: MCS0 ~ 15, max.     300Mbps
Frequency     ISM Band, 2.412GHz ~ 2.462GHz (CH1~11), programmable by     regional regulation
RSSI     ≦20db, compliant with CE request
Wi-Fi Default Antenna     Frequency: 2400~2500/ 4900~5900 MHz

Gain: 2.4GHz: 2.5 dBi, 5GHz: 3dBi

Dimension: 196xΦ13 mm

Management Interface     CGI WebGUI, Command Line Interface (CLI), IPv4/IPv6*, Telnet, SNMP     v1/v2c/v3, DDNS, DHCP server/client, DHCP Relay, TFTP,     FTP(active/passive), System Log, SMTP, ARP response over 802.2 LLC     SNAP, Proxy ARP, DNS (client/proxy), PPPOE*
Traffic Management     Flow Control*, Traffic shaping
User Management     Radius client, TACACS+, local database
Time Management     NTPv3, SNTP, Cellular Time
IoT Industrial Protocol     Serial to MQTT Conversion, Modbus RTU to MQTT Conversion,     Modbus RTU to TCP Conversion, MQTTS, CoAP, RESTful API
Meter Protocol     DLMS/COSEM*
Network Management     IPv4, SNMP v1/v2c/v3/Trap, MIB II, Entity MIB, DHCP server/client,     DHCP relay, TFTP, ARP response over 802.2 LLC SNAP, Proxy ARP, DNS     (client/proxy), private MIB
Traffic Management     1:1 NAT, NAPT(SNAT/DNAT), Port Forwarding
Redundancy Protocol     WAN/LTE Redundancy
WAN/Routing/NAT/Firewall/VPN     Routing: Static Route

NAT: 1-1 NAT, NAPT(SNAT/DNAT) ), Port Forwarding, DMZ

Firewall: Stateful Inspection firewall, IP/Port Filter, MAC ACL


Security     IEEE 802.1X/RADIUS, TLS v1.2, HTTPs/SSH, First login password                 management

WLAN AP Security: Share Key, WPA/WPA2-PSK(Pre-Shared Key),     WPA/WPA2 Enterprise

Encryption: 64/128-bit WEP(Wired Equivalent Privacy),     TKIP(WPA- PSK), AES(WPA2-PSK), ), MAC Filter

Serial Communication     TCP Server/TCP Client/UDP mode, TCP Alive check, Force TX     Delimiter/Timeout/interval/length, Long Distance Termination
VPN     OpenVPN (server/client), L2TP, GRE
Private Cloud     ThingsMaster, ThingMaster OTA
Public Cloud     AWS Agent, Azure Agent
Location     Google map, Baidu map
Cellular Configuration     Radio on/off, 2G, 3G and 4G modes configurable, SIM Security,     Connection Status, Cellular to Eth-WAN Redundancy, Backup SIM     Retry (1-10 times)
WLAN Configuration     WLAN Basic Settings: Radio on/off, AP/client mode, 2.4G 11n Band     and Frequency selection, SSID/Multi-SSID configuration, SSID          broadcast, Cellular to WLAN Auto Offload and advanced WLAN     settings, 802.1X
Utility     ViewMaster, NetMaster, Ping, Traceroute
MIB     MIB-II, Entity MIB, WoMaster Private MIB
Wi-Fi Max. Client     Up to 20
Power Requirement
Input Voltage     24V (9~30VDC)
Reverse Polarity Protect     Yes
Input Current     WR224-WLAN+LTE: 0.18A@24V
Power Consumption     WR224-WLAN+LTE: Max 4.32W@24VDC full traffic, suggest to     reserve 15% tolerance
Installation     Wall Mount/DIN Rail (DIN bracket not included)
Enclosure Material     Steel Metal
Dimension     86 x 105 x 29mm(W x D x H) / without mounting Clip
Ingress Protection     IP30
Weight     Around 350g without package/antenna
Operating Temperature & Humidity     -40°C~70°C, 5%~95% Non-Condensing
Storage Temperature     -40°C~85°C
MTBF     >200,000 hours
Warranty  5 years
Safety     EN60950-1 Compliance
EMC     EN61000-6-2/EN61000-6-4
EMI     CISPR 22, FCC part 15B Class A
EMS     EN61000-4-2 ESD, EN61000-4-3 RS, EN61000-4-4 EFT, EN61000-4-5,      EN61000-4-6 CS,EN61000-4-8 Magnetic Field
Radio     RED Compliance

Safety: EN 62368-1

EN 50385/EN62311 MPE assessment

EN 301 489-1/17/19, EN 55032/55024

EN 300 328

EN 301 908-1

FCC Part 15B