Changes

==What is band lock==

==What is band lock==

Mobile connectivity solutions are rapidly spreading in many different areas and industries. It provides attractive advantages, such as high availability, widespread coverage, relatively cheap implementation and mobility. In many cases, fiber optic or broadband solutions are simply unavailable or impractical. Usually, deploying a mobile connectivity is a fast and simple process, but, occasionally, the default and automated set up does not result in the highest possible bandwidth or the application itself requires faster data rates, than the initial setup provides. Here comes the term band lock. There are many different factors that affect the quality and speed of mobile connection, but one of the ways to achieve a better performance is to use certain frequencies. When the user equipment is picking the frequency band to use, the selected option is not necessarily the fastest one. It often is just the most available with the best signal quality indicators at the current moment. Depending on the changing connectivity conditions, the selected band can change as well. Different frequency band will provide different speed as speed is highly dependent on the bandwidth of that band and the congestion of the cell tower at that frequency. Even though higher frequencies provide higher data rates, in certain conditions quite the opposite is true, faster connectivity might be acquired on the lower end of the spectrum. Teltonika devices have a feature, which allows to manually select a specific band or several bands from all the available ones, and force the connection through those specified frequency bands. Selecting one band will force the device to use that specific band, selecting several will allow switching between them. The ability to fix bands through which mobile connection is caried out is called band lock.   

Mobile connectivity solutions are rapidly spreading in many different areas and industries. It provides attractive advantages, such as high availability, widespread coverage, relatively cheap implementation and mobility. In many cases, fiber optic or broadband solutions are simply unavailable or impractical. Usually, deploying mobile connectivity is a fast and simple process, but, occasionally, the default and automated set up does not result in the highest possible bandwidth or the application itself requires faster data rates, than the initial setup provides. There are many different factors that affect the quality and speed of mobile connection, but one of the ways to achieve a better performance is to use certain frequencies. When the user equipment is picking the frequency band to use, the selected option is not necessarily the fastest one. It often is just the most available with the best signal quality indicators at the current moment. Depending on the changing connectivity conditions, the selected band can change as well. Different frequency band will provide different speed as speed is highly dependent on the bandwidth of that band and the congestion of the cell tower at that frequency. Even though higher frequencies provide higher data rates, in certain conditions quite the opposite is true, faster connectivity might be acquired on the lower end of the spectrum. Modems used in Teltonika devices support a feature, which allows to manually select a specific band or several bands from all the available ones, and force the connection through those specified frequency bands. Selecting one band will force the device to use that specific band, selecting several will allow switching between them. The ability to fix bands through which mobile connection is carried out is called band lock.   

==Band lock configuration==

==Band lock setting==

===RUTOS WebUI===

===RUTOS WebUI===

*The steps to select and lock LTE bands on Teltonika devices are as follows:

*The steps to select and lock LTE bands on Teltonika devices are as follows:

#Open device‘s WebUI and go to Network -> Mobile -> General.

#Open device‘s WebUI and go to '''Network''' -> '''Mobile''' -> '''General'''.

#If necessary, select the SIM card you want to apply band locking.

#If necessary, select the SIM card you want to apply band locking.

#Under the SIM card settings section, select Service mode 4G (LTE) only, otherwise, in case of no signal, the router will switch to 3G or 2G bands.

#Under the SIM card settings section, select Service mode '''4G (LTE) only''', otherwise, in case no LTE signal and depending on availability, the router will switch to 3G or 2G bands.

#Set the Band selection to Manual.

#Set the Band selection to '''Manual'''.

#A list of available bands will appear, select your desired band or bands. The list may differ, depending on the module and region the device is made for.

#A list of available bands will appear, select your desired band or bands. The list may differ, depending on the module and region the device is made for.

#Press Save & apply at the bottom of the page.

#Press '''Save & apply''' at the bottom of the page.

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You can check if the router established connectivity through your selected band by going to Status -> Network -> Mobile. In the mobile information table provided, there is a line called Connected band. It shows the band the device is currently connected to which should also be the band that was chosen manually.   

You can check if the router established connectivity through your selected band by going to Status -> Network -> Mobile. In the mobile information table provided, there is a line called Connected band. It shows the band the device is currently connected to which should also be the band that was chosen manually.   

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===AT commands===

===AT commands===

Speciffic band can be set by simply typing an AT command in the command line. The command is written in the following structure:

Specific band can be set by simply typing an AT command in the command line. The command is written in the following structure:

Gsmctl – A AT+QCFG=“band“, [<bandval>,<ltebandval>,<tdsbandval>[,<effect>]], where

Gsmctl – A AT+QCFG=“band“, [<bandval>,<ltebandval>,<tdsbandval>[,<effect>]], where

*bandval is a hexadecimal value that specifies WCDMA frequency band. If set to 0, it means not to change the WCDMA frequency band.

*bandval is a hexadecimal value that specifies WCDMA frequency band. If set to 0, it means not to change the WCDMA frequency band.