Chapter 1 - Description and Specifications

RS232 15-Pin Connector Pinout

 

 

5

 

1

 

 

 

 

10

6

 

 

 

 

15

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN

EIA

 

CCIT

Designation

 

1

DCD

 

109

Data Carrier Direct

 

6

RX

 

104

Receive Data (out)

 

2

TX

 

103

Transmit Data

 

8

DTR

 

108.2

Data Terminal Ready

RS 232

9

GND

 

 

Signal Ground

7

DSR

 

107

Data Set Ready

 

 

 

12

RTS

 

105

Request to Send

 

11

CTS

 

106

Clear to Send

 

13

RI

 

125

Ring Indicator

 

4

MICROPHONE

 

 

Audio

 

(+)

 

 

 

5

MICROPHONE (-)

 

 

 

 

 

 

10

SPEAKER (+)

 

 

 

15

SPEAKER (-)

 

 

Reset

14

RESET

 

 

To reset, connect to GND

 

 

 

 

 

 

momentarily. Open for

 

 

 

 

 

 

normal operation.

Multi-Tech Systems, Inc. MultiModem CDMA User Guide

10