# Gateway TELTONIKA TRB255 — industrial cellular gateway with 1x Ethernet RJ-45, RS-232/485 serial, NAT, firewall, QoS, DDNS

**URL:** https://aio.lv/en/product--teltonika-networks-w125727570--3467202
**Data updated:** 2026-01-21 10:53 (EET)
**Category:** VoIP Gateways
**Manufacturer:** Teltonika Networks
**Manufacturer code:** W125727570
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 32.49 €
**Prices and availability valid until:** 2026-08-06 23:59
**Price without VAT (21%):** 26.85 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--teltonika-networks-w125727570--3467202

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 05.08.2026 | free |
| Pickup points | 10.08.2026 | 1.89 EUR |
| Courier delivery to door | 10.08.2026 | 4.99 EUR |

## Summary description

TELTONIKA TRB255 is an industrial cellular gateway designed for secure network connectivity and device integration. It features one Ethernet RJ-45 port, one RS-232 port with RS-232/485 serial support, NAT, firewall, DoS protection, QoS and DDNS. Authentication supports pre-shared keys and X.509/digital certificates. Compact metal housing (83×74×25 mm), operating range −40 to 75 °C and includes LED indicators, reset button, quick guide and manual.

## Long description

TRB255 is an industrial gateway designed to connect legacy and modern equipment in one system. It provides multiple I/O, serial and Ethernet ports and an integrated LPWAN modem that supports LTE Cat M1, NB‑IoT and backward compatibility with EGPRS (2G). The gateway supports IPv4/IPv6, TCP/UDP and common management protocols such as SNMP, and offers authentication options including pre‑shared keys and digital certificates for secure communication.
Advantages
The Teltonika TRB255000000 combines serial (RS‑232/RS‑485) and Ethernet interfaces with cellular LPWAN connectivity to extend the lifetime of legacy industrial devices while enabling modern IoT deployments. Its support for both LTE Cat M1 and NB‑IoT alongside 2G fallback ensures wide network availability. Standard networking features and secure authentication methods simplify integration and remote management.
Suitable for
Upgrading legacy industrial equipment to IP-based networks
Remote monitoring and control of industrial sites
IoT deployments requiring low-power wide-area cellular connectivity (LTE Cat M1, NB‑IoT)
Integration of serial devices (RS‑232/RS‑485) into Ethernet or cellular networks
Key specifications
Model: Gateway Teltonika TRB255000000 (MPN: W125727570)
Cellular: LTE Cat M1, NB‑IoT, EGPRS (2G) fallback
Ethernet: 10/100 Mbit/s
Serial interfaces: RS‑232, RS‑485
Networking: IPv4, IPv6, TCP, UDP; SNMP for management
Authentication: pre‑shared keys, digital certificates
How to use
Install the TRB255 in a suitable industrial enclosure or DIN‑rail mount location with access to required serial and Ethernet connections. Configure network parameters (IP, APN for cellular) via the device management interface, set authentication credentials or certificates, and map serial ports to the desired networking protocols. Use SNMP or the built‑in management tools for remote monitoring and firmware updates.
Usage recommendations
For reliable operation, ensure appropriate cellular coverage for LTE Cat M1 or NB‑IoT in your area and keep device firmware up to date. When integrating legacy serial devices, verify serial settings (baud rate, parity, stop bits) match the connected equipment and secure network access with certificates or pre‑shared keys.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.165 kg |
| Certification | CE/RED, EAC, RoHS, WEEE
Draft ETSI EN 301 489-1 V2.2.0, Draft EN 301 489-19 V2.1.0, Draft ETSI EN 301 489-52 V1.1.0
EN 61000-4-2:2009
EN 300 511 V12.5.1, ETSI EN 301 908-1 V11.1.1, ETSI EN 301 908-2 V11.1.2, ETSI EN 301 908-13 V11.1.2
EN 61000-4-3:2006 + A1:2008 + A2:2010
EN 61000-4-4:2012
EN 61000-4-5:2014
EN 61000-4-6:2014
EN 61000-4-11:2004 |
| Management protocols | SNMP |
| Supported network protocols | TCP, UDP, IPv4, IPv6, ICMP, NTP, DNS, HTTP, HTTPS, FTP, SMTP, SSL v3, TLS, ARP, PPP (planned), UPNP (planned), SSH, DHCP, Telnet, MQTT (planned), Wake On Lan (WOL) (planned) |
| Safety | IEC 62368-1:2014, EN 50385:2017, EN 62232:2017 |
| Storage temperature (T-T) | 10 - 90 |
| Operating temperature (T-T) | -40 - 75 |
| Serial interface type | RS-232/485 |
| Height | 74 mm |
| LED indicators | Power |
| Authentication method | Pre-shared key, digital certificates, X.509 certificates |
| Firewall security | Yes |
| Width | 83 mm |
| Depth | 25 mm |
| Product colour | Grey |
| Networking standards | IEEE 802.3u, IEEE 802.3 |
| Ethernet LAN (RJ-45) ports | 1 |
| Quality of Service (QoS) support | Yes |
| RS-232 ports | 1 |
| Ethernet LAN data rates | 100, 10 |
| Reset button | Yes |
| Manual | Yes |
| Quick installation guide | Yes |
| DMZ support | Yes |
| DoS attack prevention | Yes |
| Network address translation (NAT) | Yes |
| Universal Plug and Play (UPnP) | Yes |
| Dynamic DNS (DDNS) | Yes |
| Harmonized System (HS) code | 85176990 |

## FAQ

### How much does the TELTONIKA TRB255 industrial cellular gateway cost, and is it available for purchase?

The price is 32.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 62 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 05.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Teltonika Networks products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Teltonika Networks service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/3467202/65783966_large.webp