The TRB256 is an industrial 4G LTE NB-IoT gateway designed to be applied to a broad range of IoT solutions. The device is equipped with multiple WAN interfaces, such as I/Os, RS232, RS485, and an Ethernet port, additionally boasting dual SIM functionality for continuous connectivity. This industrial-grade gateway also supports the 450 MHz frequency band, offering superior LTE signal penetration compared to standard frequencies, making it an optimal choice for a diverse range of M2M applications.

Ports & interfaces
RS-232 ports	1
SIM card slot	Yes
SIM card type	MiniSIM
Number of simultaneous SIM cards	2
Ethernet LAN (RJ-45) ports	1
WAN connection	Ethernet (RJ-45)
Serial interface type	RS-232, RS-485
Weight & dimensions
Width	83 mm
Depth	74.2 mm
Height	25 mm
Weight	165 g
Power
DC input voltage	9 - 30 V
Operational conditions
Operating temperature (T-T)	-40 - 75 °C
Operating relative humidity (H-H)	10 - 90%
Protocols
Management protocols	WEB UI, FOTA, SSH, SMS, Call, TR-069, MQTT, SNMP, JSON-RPC, RMS
Supported network protocols	TCP, UDP, IPv4, IPv6, ICMP, NTP, DNS, HTTP, HTTPS, SFTP, FTP, SMTP, SSL/TLS, ARP, VRRP, PPP, PPPoE, UPNP, SSH, DHCP, Telnet, SMPP, SNMP, MQTT, Wake On Lan (WOL)
DMZ support	Yes
Network
Ethernet LAN data rates	10,100 Mbit/s
Networking standards	IEEE 802.3, IEEE 802.3az, IEEE 802.3u
Dynamic DNS (DDNS)	Yes
Security
Firewall security	Yes
Authentication method	Pre-shared key, digital certificates, X.509 certificates, TACACS+, Radius, IP & Login attempts block
DoS attack prevention	Yes
Network address translation (NAT)	Yes
Management features
Web-based management	Yes
Quality of Service (QoS) support	Yes
Universal Plug and Play (UPnP)	Yes
Reset button	Yes
Design
Product colour	Black
Enclosure material	Aluminium
International Protection (IP) code	IP30
Safety	CE: EN IEC 62368-1:2020 + A11:2020, EN IEC 62311:2020 RCM: AS/NZS 62368.1:2022 CB: IEC 62368-1:2018
Performance
Control display unit	No
Features
Antenna type	External
Antenna connector type	R-SMA