AT+CFUN provides coarse-grained host control of the modem, allowing
the LTE radio and stack to be deactivated without fully powering down the module.
| <fun> | Behavior |
|---|---|
| 0 | Minimum functionality. RF TX off, LTE stack deactivated. The AT command interface and all non-radio runctionality remain available. |
| 1 | Full functionality. RF on, LTE stack active. |
| 4 | Flight mode. RF TX off. All non-radio functionality remains available. |
The <rst> parameter controls whether the command triggers a reset:
0 no reset (default), 1 reset and restart with
normal-mode +CFUN=1.
Initial state at power-on
The device boots at +CFUN=0 and does not attach automatically, giving the
host full control of the attach sequence. The boot level is configurable through
%MODEMCFG="CfunInit",<fun>,<max_delay>:.
<fun>= 0, 1, or 4 — initial functionality level.<max_delay>= 0–65 535 s — delay between modem boot and protocol stack power-on.
By default, the device uses minimum functionality (<fun>=0) with a
<max_delay> of 0 s.