electro_fran
Newbie level 5
Hello everybody,
I'm designing a mobile phone detector. My approach is to work with the GSM uplink frequency range. For this purpose, my questions are:
1- When a mobile phone is not in communication (call or SMS), what are the signals that it sends to the tower?
2- The most important for me, what is the period between these signals?
I'm designing a mobile phone detector. My approach is to work with the GSM uplink frequency range. For this purpose, my questions are:
1- When a mobile phone is not in communication (call or SMS), what are the signals that it sends to the tower?
2- The most important for me, what is the period between these signals?