Perle Systems GNS-30CR Manual de usuario descargar pdf (Pagina 15)

7.4 RS232 interface

The RS232 interface is the interface for the application software and the

connection to the PC. The customer application communicates with the Modem

by AT cellular commands. The RS232 interface is implemented as a 9-pin D-Sub

socket with two screws fitting.

Pin assignments:

Signal Pin Input/Output Description

DCD

Output

RXD 2

Input

TXD 3

Output

DTR 4

Output

GND 5

DSR 6

RTS 7

Output

CTS

Input

RI 9

Input

Serial port V.24 protocol(for reference)

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Perle Systems GNS-30CR Manual de usuario Pagina 15