Teltonika Support

Teltonika Router Support

This page covers the most common Teltonika router configuration questions, including APN setup, Wi-Fi, port forwarding, WAN failover, Power over Ethernet, and firmware management. It applies to all current RutOS-based devices including the RUT, RUTX, RUTM, RUTC, and TRB series.

routerstore.com is a UK Teltonika Diamond Partner. If you need hands-on help with a device purchased from us, our UK-based technical support team is available by phone on 0300 124 6181 or via our support page. For the official Teltonika wiki, visit wiki.teltonika-networks.com.

Five Most Common Support Issues

1. APN Not Configured or Incorrect

APN (Access Point Name) tells the router which mobile network gateway to connect through. All Teltonika routers running RutOS have Auto APN enabled by default, which works with the majority of UK and EU operators. However, some SIM cards, particularly fixed IP SIM cards and private M2M SIMs, require a manually specified APN.

To set a custom APN, go to Network → Interfaces, click Edit on the mobile interface, then toggle off Auto APN and enter the APN name provided by your SIM supplier. On older firmware (RUT9XX/RUT2XX legacy WebUI), navigate to Network → Mobile instead. After saving and applying, restart the modem if the connection does not establish. See the Auto APN wiki page for full details.

If you are using a routerstore.com IoT SIM card and are unsure of the correct APN, visit our SIM connectivity page or call us.

2. No Cellular Connection or Signal

If the router powers on but shows no mobile connection, work through the following checks in order.

• Confirm the SIM is activated and has data enabled. Test it in a phone first.
• Check the signal status at Status → Mobile. RSSI below -100 dBm or RSRP below -115 dBm indicates poor signal at the installation location.
• Verify the APN is correct for your SIM. A wrong APN will cause the modem to register to the network but fail to establish a data session.
• Check the network operator lock setting. If the SIM is locked to a specific operator, make sure the router is not configured to force a different operator or band.
• Try a modem restart via Status → Mobile → Mobile Information → Restart Modem.
• If signal is weak, consider an external antenna. See our 4G antenna range or 5G antenna range for compatible options.

3. Wi-Fi Not Working or Clients Cannot Connect

Wi-Fi issues on Teltonika routers typically fall into three categories: the wireless radio is disabled, the client is connecting to the wrong band, or a firewall rule is blocking traffic.

• Confirm Wi-Fi is enabled at Network → Wireless. Both 2.4 GHz and 5 GHz radios have separate on/off toggles.
• If clients associate but have no internet, check that the wireless interface is in the correct firewall zone (LAN, not WAN).
• Channel congestion on 2.4 GHz is common in dense environments. Switch to a fixed channel (1, 6, or 11) rather than auto, or move clients to 5 GHz.
• If the SSID does not appear, make sure SSID broadcast (ESSID visibility) is enabled.
• The default SSID and Wi-Fi password are printed on the label on the underside of the router.

4. Port Forwarding Not Working

Port forwarding on Teltonika routers is configured under Network → Firewall → Port Forwards. Create a rule specifying the external port, the internal LAN IP address of the target device, and the internal port. The rule must be saved and applied.

Port forwarding will not work if the SIM card has a dynamic (shared/NATed) IP address. The router’s WAN IP in that case is a private address assigned by the mobile network, not a publicly reachable address. Port forwarding requires a public IP. Most standard consumer and data SIM cards use dynamic IPs. A fixed IP SIM card provides a static, publicly routable address and is required for any inbound connection including CCTV remote access, remote desktop, and VPN server operation.

5. Cannot Access the Router WebUI

The default WebUI address is 192.168.1.1. The default username is admin. The default password is printed on the label on the underside of the device. You must set a new password on first login.

• If you cannot reach 192.168.1.1, confirm your device is connected to a LAN port (not the WAN port) and has received an IP address in the 192.168.1.x range via DHCP.
• If you have changed the LAN IP and forgotten it, you can factory reset the router by holding the reset button for 5-10 seconds (varies by model). Check your model’s wiki page for the exact reset procedure.
• If you have locked yourself out remotely, Teltonika RMS allows WebUI access over the cellular connection without needing the LAN IP. See our Teltonika RMS guide for details.

Common Router Models: Modems, LTE Categories, and Bands

The cellular category and modem used in a router determines maximum throughput and which frequency bands it supports. The table below covers the routers most commonly sold through routerstore.com.

Band 20 (800 MHz) is critical for rural UK coverage. Band 28 (700 MHz) is increasingly used by UK operators for extended coverage and building penetration. Check your SIM operator’s band map if you are deploying in a low-signal area. For 5G, n78 (3.5 GHz) is the primary UK 5G band. n28 (700 MHz) is used by some operators for 5G coverage extension.

Always verify the exact band list for your specific model and variant on the Teltonika wiki, as band support can differ between hardware revisions and regional variants.

Power over Ethernet: Passive PoE and Active PoE

Several Teltonika routers support being powered over Ethernet via their LAN1 port. This is Passive PoE, not active IEEE 802.3af or 802.3at PoE. The difference is critical and getting it wrong can destroy the device.

What is Passive PoE?

Passive PoE delivers a fixed voltage over spare Ethernet pairs without any power negotiation between the injector and the device. Teltonika passive PoE devices typically accept 9 V to 30 V DC (check your specific model’s powering page on the wiki). The voltage from the injector must match the device’s input range. There is no automatic negotiation to prevent damage if the voltage is wrong.

Active PoE (802.3af / 802.3at) and the damage risk

Active PoE (IEEE 802.3af and 802.3at) is the standard found in most managed switches, Ubiquiti UniFi gear, and enterprise PoE injectors. These standards deliver 48 V DC after a handshake process. Teltonika passive PoE devices are not rated for 48 V input.

Which models support Passive PoE?

Passive PoE support varies by model. Examples include the RUT950, RUT955, RUT956, and RUTX50. Always check the Powering Options page for your specific model on the Teltonika wiki before connecting any PoE source. The powering page will state the accepted voltage range and the correct pinout.

Models with active PoE input support

Some newer Teltonika models, such as the RUT951 (PoE+ variant), include proper IEEE 802.3at PoE+ input support. These can be safely powered from a standard PoE switch port. Again, always verify against the specific model’s datasheet and wiki page, as PoE support and standard compliance differ between variants of the same model family.

Best practice for PoE deployment

• Check the Powering Options wiki page for your exact model before selecting a PoE injector.
• Use a dedicated passive PoE injector at the correct voltage. Ubiquiti 24 V passive injectors are commonly used with compatible Teltonika devices.
• Do not assume that any PoE switch port is safe. Managed switches with auto-sensing PoE will attempt to deliver 48 V.
• If in doubt, power the router from its supplied 12 V DC adapter via the power socket.

Firmware Management

Stable vs Latest firmware

Teltonika publishes two firmware tracks for each model. Stable firmware has passed internal QA and large-scale user deployment testing. It is the recommended version for production deployments. Latest firmware is the most recent release with new features and fixes, but it has not yet undergone widespread field validation and may contain undiscovered issues. For critical or remote deployments, use Stable firmware and test any update on a small number of devices before rolling out widely.

Firmware downloads are available on the Teltonika wiki under each model’s firmware downloads page.

How to upgrade firmware

Firmware can be upgraded through the WebUI at System → Firmware. You can upgrade directly from the internet (FOTA) or upload a downloaded firmware file. Always take a configuration backup first via System → Administration → Backup before any firmware upgrade.

The downgrade warning

Downgrading firmware on a Teltonika router (reverting to an older version) will erase the current configuration. The device resets to factory defaults after a downgrade. This means VPN settings, APN configuration, firewall rules, and all custom settings are lost.

When upgrading across major versions, for example from legacy firmware (RUT2XX or RUT9XX series older firmware) to modern RutOS 7.x, the same applies: configuration is not migrated. Some features available in older firmware versions were also removed in RutOS 7.x. Check the firmware changelog and feature removal list on the wiki before upgrading older deployments.

Upgrading via Teltonika RMS

Teltonika RMS (Remote Management System) allows bulk firmware upgrades across multiple devices without physical access or VPN. This is the recommended approach for managing firmware across a fleet of deployed routers. See our Teltonika RMS guide for more on setting this up.

WAN Failover

WAN failover switches the router’s active internet connection from a primary WAN interface to a backup when the primary fails. All RutOS-based Teltonika routers support this natively. It is configured at Network → Failover.

How failover works in RutOS

RutOS uses interface metrics to determine WAN priority. The interface with the highest metric value is used first. If it goes offline, the router switches to the next highest metric interface. The router detects a connection failure by periodically pinging a defined host (typically 8.8.8.8 or another reliable IP). If pings fail after a set number of retries, the interface is marked as down and failover activates.

Common failover setups

Failover vs Load Balancing

RutOS supports both failover and load balancing, but not simultaneously on the same set of interfaces. Failover keeps one interface active and switches only when the primary fails. Load balancing distributes traffic across multiple interfaces simultaneously, assigning a percentage weight to each. Choose failover for redundancy and load balancing for throughput distribution. Both are configured under Network → Failover. See the Teltonika failover wiki for configuration details.

Fixed IP SIM and failover

If your primary connection uses a fixed IP SIM for VPN or remote access, note that the fixed IP is tied to that SIM. When failover switches to a backup SIM with a different IP, any VPN tunnels or remote sessions will drop and need to re-establish. Plan your VPN setup accordingly. Our VPN on cellular routers guide covers this in more detail.

Frequently Asked Questions

What is the default IP address and login for a Teltonika router?

The default WebUI address is 192.168.1.1. The default username is admin. The default password is printed on the label on the underside of the device. You are prompted to change it on first login. If you have forgotten a changed password, factory reset the device by holding the reset button for 5-10 seconds.

How do I check the signal strength on a Teltonika router?

Go to Status → Overview or Status → Mobile. Key values to check are RSRP (Reference Signal Received Power) and SINR (Signal to Noise and Interference Ratio). For LTE, an RSRP of -85 dBm or better indicates a strong signal. Below -105 dBm is poor and below -115 dBm will cause connectivity issues. If signal is marginal, an external antenna will typically make a significant difference. See our 4G antenna and 5G antenna categories for compatible options.

Why does my Teltonika router keep disconnecting from the cellular network?

Frequent disconnections are usually caused by weak signal, an incorrect APN, SIM inactivity timeout, or a data limit being reached. Check signal strength at Status → Mobile. Confirm the APN is correct for your SIM. Some M2M SIM cards deactivate after a period of no data activity. RutOS has a SIM Idle Protection feature (available as a package install) that prevents this by periodically switching to the secondary SIM and back to maintain activity. A data limit can be checked and configured at Network → Interfaces → Mobile → Data Limit.

What SIM card do I need for a Teltonika router?

Any standard nano SIM with a data plan will work for outbound internet access. If you need inbound connections (remote desktop, CCTV, VPN server, SCADA), you need a fixed IP SIM card that provides a static, publicly routable IP address. Standard consumer and business SIM cards use dynamic shared IPs that cannot accept inbound connections. Visit our SIM connectivity page for compatible fixed IP and roaming SIM options, or read our guide to fixed IP SIM cards.

Does my Teltonika router support eSIM?

eSIM support is available on several models including the RUTC40, RUTC41, RUTC50, RUTM55, RUTM56, and some variants of the RUT901, RUT956, and RUT241. Not all variants of a model include eSIM. Check the specific part number on the Teltonika wiki or product datasheet. Our eSIM router guide explains how eSIM works on cellular routers and what to consider when activating a profile.

Can I manage multiple Teltonika routers remotely?

Yes. Teltonika RMS (Remote Management System) is the official cloud platform for remote monitoring, configuration, and firmware management of RutOS devices. It provides WebUI access over the cellular connection, event alerts, VPN tunnels to individual devices, and bulk firmware deployment. RMS requires a licence per device. See our Teltonika RMS explainer for details, or call our UK-based team to discuss RMS licencing options.

Further Resources

For full technical documentation, firmware downloads, and configuration guides for every Teltonika model, the Teltonika Networks Wiki is the authoritative source. The Teltonika Community Forum covers more complex integration questions and edge cases.

For products, SIM cards, and UK-based support, see our full Teltonika router range, our IoT SIM connectivity page, and our other guides including Docker on Teltonika routers and VPN on cellular routers.