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The Teltonika TRB255 is a compact industrial LTE Cat M1/NB-IoT/EGPRS gateway equipped with an Ethernet port, a connector block which includes pins for I/O, RS232, RS485, GPS and RutOS software for advanced networking solutions.

This Gateway board packs all essential features in one package: secure power connector, I/O ports, serial communication, fast and reliable internet connection for industry applications where long lifecycle option is a must. TRB255 can be used to integrate modern and legacy industrial equipment in one solution and with a wide range of hardware and software features such as LTE Cat M1, NB-IoT, SMS control, Firewall, open VPN, IPSec.

TRB255 can be used to integrate modern and legacy industrial equipment into one solution via RS232, RS485 & Ethernet interfaces.

This industrial LTE Cat M1 & NB-IoT gateway is backward compatible to EGPRS (2G) networks. It can still be used with 2G network, however in case it gets shut down, there is a possibility to switch to LPWAN connectivity options.

Teltonika's RB255 has a wide range of industrial and networking features such as Modbus, SMS control, Firewall, OpenVPN and more.

This product is compatible with the Teltonika Networks Remote Management System (RMS).

• CONNECTIVITY: 4G/LTE (Cat M1), NB-IoT, 2G
• DUAL SIM: With auto failover, backup WAN and other switching scenarios
• SERIAL PORTS: RS232/RS485 serial communication interfaces
• 9-30V: Wide range of supported power supply voltages
• I/O: Multiple Inputs and Outputs for remote monitoring and control
• GNSS: Global Navigation Satellite System for location services with geofencing functionality

Mobile

• Mobile module: LTE (Cat M1) / NB-IoT / EGPRS
• SIM switch: 2 SIM cards, auto-switch cases: weak signal, data limit, SMS limit, on roaming, no network, network denied, data connection fail
• Status: Signal strength (RSSI), SINR, RSRP, RSRQ, EC/IO, RSCP Bytes sent/received, connected band, IMSI, ICCID.
• SMS/Call: SMS status, SMS configuration, send/read SMS via HTTP POST/GET, EMAIL to SMS, SMS to EMAIL, SMS to HTTP, SMS to SMS, scheduled SMS, SMS autoreply, Call utilities
• USSD: Supports sending and reading Unstructured Supplementary Service Data messages
• Black/White list: Operator black/white list
• Band management: Used band status display, Band lock
• APN: Auto APN
• Bridge: Direct connection (bridge) between mobile ISP and device on LAN
• Multiple PDN: Possibility to use different PDNs for multiple network access and services

Ethernet

• LAN 1 x LAN port 10/100 Mbps, comply IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX crossover (Configurable to work as WAN port)

Network

• Routing: Static routing, Dynamic routing (BGP, OSPF v2, RIP v1/v2) (planned)
• Network protocols: TCP, UDP, IPv4, IPv6, ICMP, NTP, DNS, HTTP, HTTPS, FTP, SMTP, SSL v3, TLS, ARP, PPP, SSH, DHCP, Telnet, MQTT, Wake On Lan (WOL)
• VoIP passthrough support (planned): H.323 and SIP-alg protocol NAT helpers, allowing proper routing of VoIP packets
• Connection monitoring: Ping Reboot, Periodic Reboot, LCP and ICMP for link inspection
• Firewall: Port forward, traffic rules, custom rules
• DHCP: Static and dynamic IP allocation, DHCP Relay
• QoS / Smart Queue Management (SQM) (planned): Traffic priority queuing by source/destination, service, protocol or port, WMM, 802.11e
• DDNS: Supported >25 service providers, others can be configured manually
• SSHFS: Possibility to mount remote file system via SSH protocol

Security

• Authentication Pre-shared key, digital certificates, X.509 certificates
• Firewall Pre-configured firewall rules can be enabled via WebUI, unlimited firewall configuration via CLI; DMZ; NAT; NAT-T
• Attack prevention DDOS prevention (SYN flood protection, SSH attack prevention, HTTP/HTTPS attack prevention), port scan prevention (SYN-FIN, SYN-RST, X-mas, NULL flags, FIN scan attacks)
• VLAN (planned) Tag based VLAN separation
• Mobile quota control Custom data limits for both SIM cards
• WEB filter (planned) Blacklist for blocking out unwanted websites, Whitelist for specifying allowed sites only
• Access control Flexible access control of TCP, UDP, ICMP packets, MAC address filter

VPN

• penVPN: Multiple clients and server can be running simultaneously, 12 encryption methods
• OpenVPN Encryption: DES-CBC, RC2-CBC, DES-EDE-CBC, DES-EDE3-CBC, DESX-CBC, BF-CBC, RC2-40-CBC, CAST5-CBC, RC2-64-CBC, AES-128-CBC, AES-192-CBC, AES-256-CBC
• IPSec: IKEv1, IKEv2, with 5 encryption methods (DES, 3DES, AES128, AES192, AES256)
• GRE: GRE tunnel
• Stunnel (planned): Proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the program’s code
• PPTP, L2TP: Client/Server services can run simultaneously, L2TPv3 support
• DMVPN (planned): Method of building scalable IPsec VPNs
• SSTP (planned): SSTP client instance support
• ZeroTier: ZeroTier VPN client support
• WireGuard: WireGuard VPN client and server support