Sleep Mode
4-22 AT Commands Reference Manual December 31, 2007
Sleep Mode
Note: The notation of TXD and RXD are from the perspective of the terminal unless otherwise
specified.
The terminal should activate Sleep mode by sending ATS24=n (n - number of seconds). To
disable Sleep mode, send ATS24=0.
Example of G24 Entering Sleep Mode
Terminal-TX: ATS24=n
Terminal-TX: ATxxx
Terminal-Wakeup-In=Inactive//n seconds passed since last command (and other conditions met)
G24-CTS=Inactive//G24 enters Sleep mode
Example of Terminal Wake G24 Sleep Mode
Terminal-Wakeup-In=Active
G24-CTS=Active//G24 exits Sleep mode
Terminal-TX: ATxxx//30 mseconds passed since Terminal-Wakeup-In became active
Example of G24 Wake Terminal Up
G24-CTS=Active//G24 internal event occurred. Incoming call is pending
//G24 exits Sleep mode
G24-Wakeup-Out=Active
G24-TX: RING//T mseconds passed since Terminal-Wakeup-Out became active
(T is defined by ATS102.)
The figure below shows a Sleep mode example when S24 > 0.
Figure 4-11: Sleep Mode when S24 > 0
G24CTS
(When at+mscts=0
The default)
G24
sleep
mode
(clock)
DTE TXD
awake
sleep
S24
Less then S24
30 ms
WAKEUP_IN
30 ms
S24
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