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10 Device Recovery
The following section describes available option for recovery of malfunctioning device. Usually device can become
unreachable due to power failure during firmware upgrade or if core files were wrongly modified in the file system.
Teltonika’s router does offer several ways to recover from these situations
10.1 Reset button
Reset button is located on the back panel of the device. Reset button has several functions:
Reboot the device. After the device has started if the reset button is pressed for up to 4 seconds
the device will reboot. Start of the reboot will be indicated by flashing of all 5 signal strength LEDs
together with green connection status LED.
Reset to defaults. After the device has started if the reset button is pressed for at least 5 seconds
the device will reset all user changes to factory defaults and reboot. To help the user to determine how
long should reset button be pressed signal strength LEDs count elapsed time. All 5 lit LEDs mean that 5
seconds have elapsed and reset button can be released. Start of the reset to defaults will be indicated
by flashing of all 5 signal strength LEDs together with red connection status LED.
SIM PIN on the main SIM card (SIM1) is the only parameter that is kept after reset to defaults.
10.2 Safemode
Router contains two firmware images in its internal flash memory. One is master firmware which is the default
firmware on is constantly used by the user. Another is safemode firmware which plays the role of the backup to the
master firmware.
Safemode firmware has most function of master firmware but to reduce its size some function were removed.
Removed functions are:
Wireless Hotspot
VRRPD
SNMP
Web Filter
Safemode firmware can be recognized from different logo and reduced menu in the WebUI. The sole purpose of
safemode firmware is to allow the user to update master firmware so all configuration options are removed. To make
safemode useful it is strongly recommended to back up configuration of master firmware when the user is satisfied with
the setup (described in Safemode section). After configuration backup is created it can be tested by requesting
safemode.
10.3 Bootloader’s WebUI
Bootloader also provides a way to recover the router from damaged firmware. To make it easy for the user
bootloader has its own webserver that can be accessed with any web browser.
Bootloader’s webserver can be started:
Automatically. It happens when bootloader does not detect neither master nor safemode
firmware. Flashing all 4 Ethernet LEDs indicate that bootloader’s webserver has started.
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