Mounting Hardware; Device Reset; Powering Down Your Device; Serial Signal Dc Electrical Characteristics - Multitech SocketModem Cell Device Manual

CHAPTER 3 –SPECIFICATIONS

Mounting Hardware

The board has three mounting holes at corners. Use #4 or M3 hardware for mounting the SocketModem to the
board. Refer to the Mechanical Drawings for more information.
Recommended Parts
Manufacturer
PEM PennEngineering
RAF Electronic Hardware
RAF Electronic Hardware

Device Reset

The SocketModem is ready to accept commands after a fixed amount of time ("X" Time) after power-on or reset.
Model
MTSMC-C2
1 The SocketModem may respond to a shorter reset pulse.

Powering Down Your Device

CAUTION: Failing to properly shutdown 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 the device. Disconnect power from the device.

Serial Signal DC Electrical Characteristics

Volts
Units:
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
9
Part
Surface Mount Standoff
3/16" Hex Female Standoff
4.5mm Hex Female Standoff
Time Constant
250 ms
Pin Signal Name
J37 -DSR
J38 -CTS
J39 -DCD
J40 -DTR
Minimum
0
1.5
0
2.35
"X" Time Minimum Reset Pulse
10 seconds 200 µs
Maximum
0.55
3.3
0.55
3.3
Part Number
SMTSO-M3-4ET
2051T-440-S-12 Zinc
1251-3005-S-12 Zinc
Maximum Reset Pulse
1
Less than 1 second
SocketModem CDMA MTSMC-C2 Device Guide