Category
SMS
Certifications and Compliance
EMC Compliance
Radio Compliance
Safety Compliance
Network Compliance
Carrier
Powering Down Your Device
CAUTION:
Failing to properly power down the device before removing power may corrupt your device's file
system.
To properly power down your device, use the following sequence :
1.
Issue the AT#SHDN command.
2.
Wait 30 seconds.
3.
Power off or disconnect power.
Note:
If you send AT#SHDN and do not remove power, the radio restarts after 60 seconds.
UART DC Electrical Characteristics
Units: Volts
Applies to the following pins:
Pin
Signal Name
J33
-RTS
J34
-RXD
J35
-TXD
J36
-RI
Parameter
3.3 Volt Powered
Input Low Level
Input High Level
®
SocketModem
Cell MTSMC-LAT3 Device Guide
Description
Point-to-Point messaging
Mobile-Terminated SMS
Mobile-Originated SMS
FCC Part 15 Class B
FCC Part 22, 24, 27
UL 60950-1 2nd ED
cUL 60950-1 2nd ED
IEC 60950-1 2nd ED
PTCRB
AT&T/T-Mobile
Pin
Signal Name
J37
-DSR
J38
-CTS
J39
-DCD
J40
-DTR
Minimum
0
1.5
Maximum
0.55
3.3
SPECIFICATIONS
11