Index Signal; Index Signal Pins; Usb Interface; Definition Of Usb Interface - Fibocom L-831-EA User Manual

5.3 Index Signal

5.3.1 Index Signal Pins

L831-EA module used for providing drain output signal and indicate RF condition:
Pin # Name
10 LED1#
The condition description of LED1# signal as listed below :
No.
Condition
1
RF open
2
RF closed
The recommended design as follows:

5.4 USB Interface

5.4.1 Definition of USB Interface

Pin No Pin Name
7 USB_DP
8 USB_DM
L831-EA wireless module supports USB 2.0. It should be installed USB driver before using on PC.
While L831-EA wireless module plugged into the PC, the USB interface with the drive can map 3 COM
ports and 4 NCM ports at PC end of Windows system, and for details as listed below:
 Two COM ports for sending AT Commands.
 One COM port for tracing LOG information.
 Four NCM ports are VLAN ports, mainly used for initiating data services .
Note: The COM port can used as Modem COM port and initiate data services. But cause of the speed of
L831-EA Module Hardware User Manual
Description
Close or open the condition indication of RF network, CMOS 3.3V
LED1#
Low level
High level
Figure5- 5 Recommended design of LED condition index
I/O
I/O
I/O
Description
USB signal+
USB signal-
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