Powering Down Your Device; Uart Dc Electrical Characteristics - Multitech SocketModem Series Device Manual

Category
Certifications and Compliance
EMC and Radio
Compliance
Safety 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 or pull 3G_ONOFF signal low:
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 AND the 3G_ONOFF line is high, 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
Output Low Level
Output High Level
®
SocketModem Cell MTSMC-LSP3 Device Guide
Description
FCC Part 15 Class B
FCC Part 22
FCC Part 24
FCC Part 27
UL 60950-1 2nd ED
Sprint
Pin Signal Name
J37 -DSR
J38 -CTS
J39 -DCD
J40 -DTR
Minimum
0
1.5
0
2.35
Maximum
0.55
3.3
0.55
3.3
SPECIFICATIONS
11