TRB255 Mobile
The information in this page is updated in accordance with firmware version TRB2_R_00.07.04.3.
Summary
The Mobile page is used to configure mobile connection settings.
This manual page provides an overview of the Mobile page in TRB255 devices.
If you're having trouble finding this page or some of the parameters described here on your device's WebUI, you should turn on "Advanced WebUI" mode. You can do that by clicking the "Basic" button under "Mode", which is located at the top-right corner of the WebUI.
General
The General section is used to configure SIM card parameters that define how the device will establish a mobile connection.
SIM card settings
The SIM Card Settings section is used to configure main SIM card parameters. Refer to the figure and table below for information on the fields contained in that section.
| Field | Value | Description |
|---|---|---|
| Default SIM | off | on; default: on | Sets this SIM slot as the default one. |
| Deny data roaming | off | on; default: off | Denies data connection on roaming conditions. |
| VoLTE | Auto | On | Off; default: Auto | Enables Voice over LTE, a digital packet technology that uses 4G LTE networks to route voice traffic and transmit data. |
| Network type | Auto | 4G (LTE) only | 2G only | 4G + 2G; default: Auto | Network connection type preference. |
| Network Category | M1 only | NB only | Auto; default: M1 only | Selects LTE category preference. Note: this field only becomes visible when Network type is set to 4G (LTE) only. |
| PIN | integer [0000..99999999]; default: none | SIM card's PIN (Personal Identification Number) is a secret numeric password used to authenticate the device to the SIM card. PIN codes are comprised of numbers only and the length can range from 4 to 8 symbols. PIN number is saved in flash memory therefore it does not reset when default settings are restored. |
Low signal reconnect
The Low signal reconnect section is used to configure modem operator connection resetting based on signal strength for specified SIM card.
| Field | Value | Description |
|---|---|---|
| Enable | off | on; default: off | Enables Low signal reconnect. |
| Reset threshold | integer [-120..-50]; default: none | Signal threshold in dB for the connection. When signal is under this value modem resets connection. |
| Reset timeout | integer [15..65535]; default: 600 | Time for the device to wait in seconds before trying to reset the connection again. |
Operator settings
The Operator Settings section is used to configure which operators can be allowed (Whitelist) or blocked (Blacklist) for specified SIM card.
| Field | Value | Description |
|---|---|---|
| Enable | off | on; default: off | Enables Whitelist or Blacklist for specified operator list. |
| Mode | Whitelist | Blacklist; default: Whitelist | Mode to be applied for operator list.
|
| Operator list | operator list; default: none | A list of operators which can be configured in Operators List page. |
SMS limit settings
The SMS Limit Settings section provides you with the possibility to set up a maximum sent SMS message cap for your SIM card.
| Field | Value | Description |
|---|---|---|
| Enable SMS Limit | off | on; default: off | Turns SMS limiting on or off. |
| SMS limit count | integer; default: none | Sets the SMS sending cap, i.e., how many SMS messages can be sent from this SIM card during the specified period. |
| Period | Day | Week | Month; default: Day | Period for which SMS limiting should apply. After the period expires, the SMS limit counter will be reset. |
| Start hour/day | 0-23 / Monday - Sunday / 0-31; default: 0 | Starting hour of the day / day of the week / day of the month for SMS limiting period. |
| Clear SMS Limit | - (interactive button) | Clears the SMS limit counter for the selected period. |
SIM Switch
The SIM Switch section provides you with the possibility to configure SIM switching rules, i.e., set up circumstances under which the device will perform a switch from using one SIM card to another. Refer to the figure and table below for information.
| Field | Value | Description |
|---|---|---|
| Enable automatic switching | off | on; default: off | Turns automatic SIM switching on or off. |
| Check interval | integer [3..3600]; default: 10 | The frequency (in seconds) at which the device will check for SIM switch conditions. If such a condition exists, the router will perform a SIM switch, if not - it will check for the same conditions again after the amount of time specified in this field passes. |
| Attempts before SIM switch | integer [1..10]; default: 3 | How many times a condition will be checked before executing a SIM switch. For example, if the device is a state that meets at least one SIM switch condition, the device will perform a number of additional checks specified in this field and will perform a SIM switch only if the condition is met on every check. |
| On weak signal | off | on; default: off | Performs a SIM switch when the signal strength drops below a certain threshold. |
| On data limit | off | on; default: off | Performs a SIM switch when the mobile data limit for this SIM card is reached. You can set up a mobile data limit in the Network → WAN (Basic WebUI mode) or Network → Interfaces (Advanced WebUI mode) pages by clicking 'Edit' next to the interface you wish limit the data for. |
| On SMS limit | off | on; default: off | Performs a SIM switch when the SMS limit for this SIM card is reached. You can set up SMS limit in the Network → Mobile → General page. |
| On roaming | off | on; default: off | Performs a SIM switch when roaming conditions are detected. |
| No network | off | on; default: off | Performs a SIM switch when a network connection is not available. |
| On network denied | off | on; default: off | Performs a SIM switch when access to a network is denied by an operator. |
| On data connection fail | off | on; default: off | Performs a SIM switch when mobile data connection fails. Possible failure determination methods are:
|
When configuring SIM switching from the Secondary card, an additional field called "Switch back to primary SIM card after timeout" becomes available:
| Field | Value | Description |
|---|---|---|
| Switch back to primary SIM card after timeout | yes | no; default: no | Attempts to switch back to the primary SIM card once the specified period of time passed. |
| Initial timeout (min) | integer; default: 1 | Indicates a time value (in minutes) after which the device will attempt to switch back to the primary SIM card. |
Network operators
Operators list
This section is used to create lists of operators codes, which can then be used in Operator settings section to Whitelist of Blacklist them. Operator code consists of two parts - Mobile Country Code (MCC) and Mobile Network Code (MNC).
By clicking Edit 
on a list you will be redirected to editing page in which you can enter operator codes for that list.
