Specifications

Chapter 2 – Configuration Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 25
7 CYCLIC SLEEP mode:
In this mode, the serial interface is shortly enabled during paging. If
characters are recognized on the serial interface, the ME stays active for 2
seconds after the last character was sent or received. ME exits SLEEP
mode only, if AT+CFUN=1 is entered.
9 CYCLIC SLEEP mode:
In this mode, the serial interface is shortly enabled while CTS is active. If
characters are recognized on the serial interface, the ME stays active after
the last character was sent or received for at least the time, which can be
configured by AT^SCFG=”PowerSaver/Mode9/Timeout”,<psm9to>
(temporary wakeup).
In contrast to SLEEP mode 7 assertion of RTS can also be used to
temporarily wake up the ME. In this case too, activity time is at least the time
set with AT^SCFG=”PowerSaver/Mode9/Timeout”,<psm9to>.
ME exits SLEEP mode only if AT+CFUN=1 is entered.
<rst> The parameter can only be used if the serial interface is enabled.
Due to the command syntax, you need to enter parameter <fun>, followed
by <rst>, where <fun> is only a placeholder and has no effect. See examples
below.
Default value if the parameter is omitted (0 will be assumed).
0 Placeholder for <fun> as stated above. Default.
1 ME resets and restarts to full functionality. After reset and restart, PIN 1
authentication is necessary (AT+CPIN). If autobauding is enabled, it is
recommended to wait 3 to 5 seconds before entering the first AT
command. For details on autobauding refer to Section 4.9.1,
Autobauding.
Notes:
• When a circuit-switched call is in progress, <fun>=7 or 9 can be activated without terminating the call.
However, setting <fun>=0, during a circuit-switched call immediately disconnects this call.
• To check whether power saving is on, you can query the status with the read command AT+CFUN? only if
the module is in full functionality mode or in CYCLIC SLEEP mode. If available, you can also take advantage
of the status LED controlled by the SYNC pin (see AT^SSYNC). With AT^SSYNC you can select different
modes of LED signalization during SLEEP modes (See Section 18.4.1., ME Status Indicated by Status LED
for details. However, the module can wake up temporarily from power saving without leaving its CYCLIC
SLEEP mode (without changing +CFUN “<fun>”); e.g., for a network scan after a loss of radio coverage, or
after receipt of serial data during CYCLIC SLEEP mode. During this “temporary wakeup state” the LED will
operate as if the ME was in full functionality mode.
• Recommendation: In NON-CYCLIC SLEEP mode, you can set an RTC alarm to wake up the ME and return
to full functionality. This is a useful approach because, in this mode, the AT interface is not accessible.
• This command is not PIN protected.
• This command is supported in airplane mode.
2.9.1 Wake up the ME (Mobile Equipment) from SLEEP Mode
A wake-up event is any event that causes the mobile equipment (ME) to draw more current. Depending on the
selected mode, the wake-up event either switches the SLEEP mode off and takes the ME back to full
functionality AT+CFUN=1, or activates the ME temporarily without terminating the selected SLEEP mode.
Definitions of the state transitions described in the table below:
• Quit: ME exits SLEEP mode.
• Temporary: ME becomes active temporarily for the duration of the event and the mode-specific follow-up
time after the last character was sent or received on the serial interface.
• No effect: Event is not relevant in the selected SLEEP mode. The ME does not wake up.