Sony ECM-3711 Benutzerhandbuch

32 ECM-3711 Series User’s Manual 
 

 

TxD 

Serial output. This signal sends serial data to the communication link. The signal is 

set to a marking state on hardware reset when the transmitter is empty or when 

loop mode operation is initiated. 

RxD 

Serial input. This signal receives serial data from the communication link. 

DTR 

Data Terminal Ready. This signal indicates to the modem or data set that the 

on-board UART is ready to establish a communication link. 

DSR 

Data Set Ready. This signal indicates that the modem or data set is ready to 

establish a communication link. 

RTS 

Request To Send. This signal indicates to the modem or data set that the on-board 

UART is ready to exchange data. 

CTS 

Clear To Send. This signal indicates that the modem or data set is ready to 

exchange data. 

DCD 

Data Carrier Detect. This signal indicates that the modem or data set has detected 

the data carrier. 

RI 

Ring Indicator. This signal indicates that the modem has received a telephone 

ringing signal. 

 

 

 

GND 

10

9 

RI 

CTS 8 

7 

RTS 

DSR 

6 

5 

GND 

DRT 4 

3 TxD 

RxD 

2 

1 

DCD