Description
TRB255 – Teltonika Industrial Cellular LTE CAT M1 / NB-IOT / EGPRS Gateway
The Teltonika TRB255 is an industrial CAT-M1 4G gateway, featuring an LPWAN modem, a GNSS receiver, a Fast Ethernet port (10/100), a durable 16-pin connector block and 2 digital input/outputs. This gateway supports a wide array of advanced IoT features including a secure and reliable power connector, serial communication and RS232/RS485 interfaces. The TRB255’s robust design and future-proofed functionality make it a great choice for any industrial IoT scenarios in which long-term reliability is paramount, and its CAT-M1 functionality allows it to offer strong IoT network speeds with low latency.
The flexibility of the TRB255 allows it to integrate modern and legacy industrial equipment together while operating with a wide range of utilities such as CAT-M1, NB-IoT, SMS control, Firewall services, OpenVPN, IPSec and Remote Management Services. It can even sustain backwards compatibility with EGPRS (2G) networks, allowing pre-existing 2G network systems to continue running should 2G services become unavailable and ensuring long-term viability.
The TRB255 is extremely energy efficient and its frame is robust as well as being small and lightweight, making it highly adaptable and reliable for many scenarios, whether domestic or industrial. This adaptability is enhanced by its ability to be powered via passive PoE, eliminating the requirement that it needs to be installed near a power supply and allowing it to be installed with equipment that’s quite out-of-the-way and difficult to reach. It also works well in vehicles, particularly with its GNSS support, and other high-performance industrial scenarios in which reliable long-term continuity is necessary.
TRB255 Key Features
- LTE Cat M1 / NB-IoT / EGPRS Communication
- Configurable Inputs/Outputs for remote monitoring and control
- GNSS positioning with geofencing functionality
- RS232/RS485 serial communication interfaces
- Teltonika Remote Management System compatible
- Dual SIM ensures internet connectivity if single operator network stops working
- 18-month warranty
Teltonika TRB255 Specification
Mobile module
LTE (Cat M1) / NB-IoT / EGPRS
SIM switch
2 SIM cards, auto-switch cases: weak signal, data limit, SMS limit, roaming, no network, network denied, data connection fail, SIM idle protection
Status
Signal strength (RSSI), SINR, RSRP, RSRQ, EC/IO, RSCP, Bytes sent/received, connected band, IMSI, ICCID
SMS
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, SMPP
USSD
Supports sending and reading Unstructured Supplementary Service Data messages
Black/White list
Operator black/white list
Multiple PDN
Possibility to use different PDNs for multiple network access and services
Band management
Band lock, Used band status display
APN
Auto APN
Bridge
Direct connection (bridge) between mobile ISP and device on LAN
Passthrough
Router assigns its mobile WAN IP address to another device on LAN
LAN
1 x LAN port, 10/100 Mbps, compliance with IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX
Routing
Static routing, Dynamic routing (BGP, OSPF v2, RIP v1/v2, NHRP)
Network protocols
TCP, UDP, IPv4, IPv6, ICMP, NTP, DNS, HTTP, HTTPS, FTP, SMTP, SSL v3, TLS, ARP, VRRP, PPP, PPPoE, UPNP, SSH, DHCP, Telnet, SMPP, SMNP, MQTT, Wake On Lan (WOL)
VoIP passthrough support
H.323 and SIP-alg protocol NAT helpers, allowing proper routing of VoIP packets
Connection monitoring
Ping Reboot, Wget Reboot, Periodic Reboot, LCP and ICMP for link inspection
Firewall
Port forward, traffic rules, custom rules
DHCP
Static and dynamic IP allocation, DHCP Relay, Relayd
QoS / Smart Queue Management (SQM)
Traffic priority queuing by source/destination, service, protocol or port, WMM, 802.11e
DDNS
Supported >25 service providers, others can be configured manually
Network backup
Mobile, VRRP, Wired options, each of which can be used as an automatic Failover
Load balancing
Balance Internet traffic over multiple WAN connections
SSHFS
Possibility to mount remote file system via SSH protocol
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
Port and tag based VLAN separation
Mobile quota control
Custom data limits for both SIM cards
WEB filter
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
OpenVPN
Multiple clients and a server can run 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 for IPsec (DES, 3DES, AES128, AES192, AES256)
GRE
GRE tunnel
PPTP, L2TP
Client/Server instances can run simultaneously, L2TPv3 support
Stunnel
Proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the program’s code
DMVPN
Method of building scalable IPsec VPNs
SSTP
SSTP client instance support
ZeroTier
ZeroTier VPN client support
WireGuard
WireGuard VPN client and server support
ID range
Respond to one ID in range [1;255] or any
Allow Remote Access
Allow access through WAN
Custom registers
MODBUS TCP custom register block requests, which read/write to a file inside the router, and can be used to extend MODBUS TCP Slave functionality
Supported functions
01, 02, 03, 04, 05, 06, 15, 16
Supported data formats
8 bit: INT, UINT; 16 bit: INT, UINT (MSB or LSB first); 32 bit: float, INT, UINT (ABCD (big-endian), DCBA (little-endian), CDAB, BADC)
Supported baud rates:
From 300 – 3000000
Supported functions
01, 02, 03, 04, 05, 06, 15, 16
Supported data formats
8 bit: INT, UINT; 16 bit: INT, UINT (MSB or LSB first); 32 bit: float, INT, UINT (ABCD (big-endian), DCBA (little-endian), CDAB, BADC), HEX, ASCII
Number of data bits
From 7 to 8
Number of stop bits
1 or 2
Parity
None, Even, Odd
Flow
None, RTS/CTS, Xon/Xoff
Duplex
Full duplex
Supported baud rates
From 300 to 3000000
Supported functions
01, 02, 03, 04, 05, 06, 15, 16
Supported data formats
8 bit: INT, UINT; 16 bit: INT, UINT (MSB or LSB first); 32 bit: float, INT, UINT (ABCD (big-endian), DCBA (little-endian), CDAB, BADC), HEX, ASCII
Number of data bits
7 or 8
Number of stop bits
1 or 2
Parity
None, Even, Odd
Flow
None, Xon/Xoff
Duplex
Half duplex
Protocol
HTTP(S), MQTT, Azure MQTT
MQTT Gateway
Allows sending commands and receiving data from MODBUS Master through MQTT broker
Supported modes
TCP Master, DNP3 Outstation, RTU Master
WEB UI
HTTP/HTTPS, status, configuration, FW update, CLI, troubleshoot, event log, system log, kernel log
FOTA
Firmware update from server, automatic notification
SSH
SSH (v1, v2)
SMS
SMS status, SMS configuration, send/read SMS via HTTP POST/GET
Call
Reboot, Status, Mobile data on/off, Output on/off, answer/hang-up with a timer
TR-069
OpenACS, EasyCwmp, ACSLite, tGem, LibreACS, GenieACS, FreeACS, LibCWMP, Friendly tech, AVSystem
MQTT
MQTT Broker, MQTT publisher
SNMP
SNMP (v1, v2, v3), SNMP Trap
JSON-RPC
Management API over HTTP/HTTPS
MODBUS
MODBUS TCP status/control
RMS
Teltonika Remote Management System (RMS)
Cloud of Things
Allows monitoring of: Device data, Mobile data, Network info, Availability
ThingWorx
Allows monitoring of: WAN Type, WAN IP, Mobile Operator Name, Mobile Signal Strength, Mobile Network Type
Cumulocity
Allows monitoring of: Device Model, Revision and Serial Number, WAN Type and IP, Mobile Cell ID, ICCID, IMEI, Connection Type, Operator, Signal Strength
Azure IoT Hub
Can send device IP, Number of bytes send/received, Temperature, PIN count to Azure IoT Hub server, Mobile connection state, Network link state, IMEI, ICCID, Model, Manufacturer, Serial, Revision, IMSI, SIM State, PIN state, GSM signal, WCDMA RSCP, WCDMA EC/IO, LTE RSRP, LTE SINR, LTE RSRQ, CELL ID, Operator, Operator number, Connection type
CPU
Atheros Wasp, MIPS 74Kc, 550 MHz
RAM
64 MB, DDR2
FLASH storage
16 MB, SPI Flash
WEB UI
Update FW from file, check FW on server, configuration profiles, configuration backup, restore point
FOTA
Update FW
RMS
Update FW/configuration for multiple devices at once
Keep settings
Update FW without losing current configuration
Operating system
RutOS (OpenWrt based Linux OS)
Supported languages
Busybox shell, Lua, C, C++
Development tools
SDK package with build environment provided
GNSS
GPS, GLONASS, BeiDou, Galileo and QZSS
Coordinates
GNSS coordinates via WebUI, SMS, TAVL, RMS
NMEA
NMEA 0183
NTRIP
NTRIP protocol (Networked Transport of RTCM via Internet Protocol)
Server software
Supported server software TAVL, RMS
Geofencing
Configurable multiple geofence zones
RS232
Terminal block connector: TX, RX, RTS, CTS
RS485
Terminal block connector: D+, D-, R+, R- (2 or 4 wire interface)
Serial functions
Console, Serial over IP, Modem, MODBUS gateway, NTRIP Client
Input
3 x Digital Input, 0 – 6 V detected as logic low, 8 – 30 V detected as logic high. 1 x Analog input (0 – 30 V)
Output
3 x Digital Output, Open collector output, max output 30 V, 300 mA
Events
Email, RMS, SMS
I/O juggler
Allows to set certain I/O conditions to initiate event
Connector
2 pins in 16-pin industrial terminal block
Input voltage range
9 – 30 VDC, reverse polarity protection, surge protection +/-1 kV 50 µs max
Power consumption
Idle: < 1.2 W, Max: < 5 W
Ethernet
1 x RJ45 port, 10/100 Mbps
I/O’s
3 x Configurable I/O, 1 x Analog input in 16 pin terminal block
Status LEDs
3 x connection status LEDs, 3 x connection strength LEDs, 1 x power LED, 1 x Eth port status LED
SIM
2 x SIM slots (Mini SIM – 2FF), 1.8 V/3 V, external SIM holders, eSIM (Optional)
Power
1 x 16-pin terminal block
Antennas
1 x SMA connector for LTE, 1 x SMA connector for GNSS
RS232
4 pins in 16 pin terminal block (TX, RX, RTS, CTS)
RS485
1 x 6-pin terminal block for 2-wire or 4-wire interface
Reset
Reboot/User default reset/Factory reset button
Casing material
Aluminum housing
Dimensions (W x H x D)
110 x 50 x 100 mm
Weight
165 g
Mounting options
DIN rail (can be mounted on two sides), flat surface placement
Operating temperature
-40 °C to 75 °C
Operating humidity
10% to 90% non-condensing
Ingress Protection Rating
IP30
