10
system-view
2.
Enter cellular interface view.
controller cellular
interface-number
3.
Set the RSSI thresholds.
rssi
{
gsm
|
1xrtt
|
evdo
|
lte
}
{
low lowthreshold
|
medium
mediumthreshold
}
By default, the lower and upper RSSI thresholds for a 3G/4G modem are –150 dBm and 0 dBm,
respectively.
The value of
lowthreshold
cannot be smaller than the value of
mediumthreshold
because the system automatically adds a negative sign to the RSSI thresholds.
Issuing a configuration directive to a 3G/4G
modem
Restrictions and guidelines
Configuration directives might cause malfunction of a 3G/4G modem. When you issue a
configuration directive to the modem, make sure you understand the impact on the 3G/4G modem.
Procedure
1.
Enter system view.
system-view
2.
Enter cellular interface view.
controller cellular
interface-number
3.
Issue a configuration directive to the 3G/4G modem.
sendat at-string
Configuring 3G/4G modem reboot
Configuring automatic reboot
About automatic reboot
The 3G modem might malfunction in an unstable 3G network or when the application environment
changes. During a malfunction, the modem cannot respond to the device's requests or configuration
commands. If the device does not receive any responses from the 3G modem within the timeout
interval, a response failure occurs. When the number of consecutive response failures reaches the
threshold, the device restarts the 3G modem automatically.
The device does not restart the 3G modem when the 3G modem has not made a successful dialup
since the last restart. This restriction avoids repeated restarts of the 3G modem when there are
configuration errors.
Procedure
1.
Enter system view.
system-view
2.
Enter cellular interface view.
controller cellular
interface-number
3.
Configure the response timeout and the threshold for the number of consecutive timeouts to
enable automatic reboot of the 3G/4G modem.
