Figure 18 Enabler Ii-G Serial Interface - Enfora Enabler II-G Integration Manual

Integration Guide
Version 1.01
6.8.7 Serial Interface (9 Pin I/F) (See table in section 6.5.1 I/O Connector Pin Assignments)
The modem provides a standard 16550 UART serial interface to the host. The data interface operates at
CMOS level. The Enabler II-G is designed to be used like a DCE device. RxData is the serial data from the
modem to the host. TxData is the serial data from the host to the modem.
Enabler II-G
UART
Figure 17 Enabler II-G Serial Interface
This data may contain 7 or 8 data bits, 1 or 2 stop bits, even/odd/no parity bits. The baud rate may be
adjusted to 75, 150, 300, 1200, 2400, 4800, 9600,19200, 38400, 57600, or 115200 bits per second.
Default settings are 8 data, 1 stop, no parity, and 115200 baud. DTR may be used to force the modem into
AT command mode from online data mode (See AT Command Document, command AT&D). RTS and CTS
may be used for hardware handshaking. DSR is always active (connected to ground) while the modem is
on. RING may be used to alert the host to a variety of incoming calls.
For a minimal implementation, connect RxData and TxData to the COM port serial data lines, connect DTR
and RTS to GND.
The electrical characteristics for the I/O lines are the same as the General Purposes Input/Output (GPIO)
lines.
GSM0108PB001
Host
Tx
Rx
DCD
RTS
DSR
DTR
CTS
RING
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