Multi-Tech Systems MTCBA-G-F4 Benutzerhandbuch

Chapter 1 – Product Description and Specifications  

Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide   

9  

 

10

11

6

1

5

1 5

 

1 

DCD 

109 

Data Carrier Direct 

6 

RX 

104 

Receive Data (out) 

2 TX 

103  Transmit 

Data 

8 

DTR 

108.2 

Data Terminal Ready 

9 GND 

 

Signal 

Ground 

7 

DSR 

107 

Data Set Ready 

12 

RTS 

105 

Request to Send 

11 

CTS 

106 

Clear to Send 

RS-232 

13 RI 

125 

Ring 

Indicator 

4 MICROPHONE 

(+) 

 

 

5 MICROPHONE 

(-) 

 

 

10 SPEAKER 

(+) 

 

 

Audio 

15 SPEAKER 

(-) 

 

 

Boot 

3 

BOOT 

 

For factory use only. 

Reset 

14 

RESET 

 

To reset, connect to GND momentarily (typical: 
2mSec).  Open for normal operation. 

 

AT commands for the GPRS wireless modem are published in a separate Reference Guide included on the 
MultiModem CD and posted on the Multi-Tech web site. 
IP commands for GPRS modems are also published in a separate Reference Guide included on the MultiModem 
CD and posted on the Multi-Tech web site.