Mobile interface
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set gprs umts
The radio module tries to connect to the 3G Network; if it does not succeed, it tries to connect to
the 2G Network. Differently from the previous command, once the network type has been selected
it does not change until the radio module disconnection.
set gprs no-umts
Only the 2G network will be selected for radio module connection.
set gprs umts-only
Only the 3G network will be selected for radio module connection.
On the routers that have the LTE interface (like Imola 5xxx) you can use the command:
set gprs lte
that enables the modem to work on the LTE network, if available; otherwise the connectivity
available in the network cell (like 3G or 2G).
If you use
set gprs lte
you can specify other options to select the work frequencies or the radio
technology. In particular the command:
set gprs lte-band <value>
allows to select the working frequency on LTE network (admitted values are
b1
,
b3
,
b7
,
b8
,
b20
,
b8-900
,
b1-2100
).
The command:
set gprs selrat <value>
where <value> can be:
2G-Only 3G-Only 2G-3G-Only LTE-Only LTE-Preferred 3G-LTE 2G-3G-LTE auto
allows to specify the radio access technology.
Usually, the value
auto
is used when you want to empower the modem to auto-select the best radio
technology to use.
If you specify the
LTE-Preferred
value, the router tries to register on a LTE cell and if the attempt
fails, it will do the
Fall-Back
over other technologies. In this case, you can use:
set gprs fallback-rat <value>
where
<value>
can be:
2G-Only
3G-Only
2G-3G-Only
auto
In this way you determine which technology the router must use during the
Fall-Back
operation.
You can use the parameter
lte-camping-timer
in association to the value
LTE-Preferred
. Using
this parameter, you can specify an interval in seconds within which it is verified if the modem radio
is connected to a LTE cell. For example, you can use the syntax:
set gprs selrat LTE-Preferred
set gprs selrat lte-camping-timer 3600
Every 3600 seconds the router controls if the modem is connected to a LTE cell and if not, it tries to
make a new registration. You must remember that if the router is located in a 3G cell, the
connection is temporarily disabled.
