What is the difference in the following two modes?
1> GSM in sleep mode
2>GSM is on but not doing anything
Ofcourse, there is a differnce of power consumption but do they differ functionally also?
Please comment
Thanks
Welcome to ETO
GSM phones have a whole load of different mode, which use different amounts of power.
You can get the data sheet for a GSM module from here:-
https://www.telit.com/products/prod...uct-service-selector/show/product/ge865-quad/
and on page 26 there is this information:-
SWITCHED OFF Module supplied but Switched Off <62uA
IDLE mode:-
AT+CFUN=1 16.0 mA Normal mode: full functionality of the module
AT+CFUN=4 16.0 mA Disabled TX and RX; module is not registered on the network
AT+CFUN=0 or =5
3.9 mA Paging Multiframe 2
2.5 mA Paging Multiframe 3
2.4 mA Paging Multiframe 4
1.5 mA Paging Multiframe 9
CSD TX and RX mode GSM Voice call
GSM900 CSD PL5 240 mA
DCS1800 CSD PL0 175 mA
GPRS (class 1) 1TX + 1RX GPRS Sending data mode
GSM900 PL5 225 mA
DCS1800 PL0 160 mA
GPRS (class 10) 2TX + 3RX GPRS
Sending data mode
GSM900 PL5 420 mA
DCS1800 PL0 290 mA
In the "off" mode the phone does nothing. The standby modes are when the module isn't communicating. The different Paging Multiframe modes are where the phone is registered on a network, and the network says that the phone can turn off for a few seconds without de-registering. The phone turns on for a brief time to check for calls to the phone, and then turns off again.
During a call the phone transmits 1/8th of the time. In GPRS class 1 mode, it transmits for the same amount of time. In GPRS class 10, the phone transmits for 2 slots not one, so transmits 1/4 of the time, and takes more power.
It gets a bit more complicated when you get onto 3G or 4G phones.