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Chapter 3 – Electrical Characteristics

Wireless ModemModule GSM/GPRS Developer’s Guide 21

Power OFF Procedure

In order to power OFF the ModemModule, switch it OFF both via software (AT+CPOF; see AT Command

Manual for more details) and via hardware line. See the diagrams below.

ON/~OFF

AT +C P OF

Serial Link

to ModemModule

OK r e s po n se

Serial Link

from

Mo de m Mod ul e

About

500 ms

Modem Modul e

Stat u s

___

OFF___

Figure 3-4: Power-Off Procedure 1

ON /~O FF

AT+ CP OF

Serial Li nk

to ModemModule

OK response

Serial Li nk

from

ModemModule

___

OF F__ _

About

500 ms

ModemModule

Stat us

About

500 ms

Figure 3-5: Power-Off Procedure 2

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