Pin Assignments

EIA-232-D Pin Assignments

Table E-3 lists the EIA-232-D pin assignments for the modem.

Table E-3

EIA-232-D Pin Assignments

RS-232

Name

EIA

ITU-T

Signal

Circuit Function

Pin

Circuit

Source

 

 

 

 

 

 

 

 

 

1

AA

101

Shield

 

 

 

 

 

 

2

TXD

BA

103

DTE

Transmit Data

 

 

 

 

 

 

3

RXD

BB

104

DCE

Receive Data

 

 

 

 

 

 

4

RTS

CA

105

DTE

Request-to-Send

 

 

 

 

 

 

5

CTS

CB

106

DCE

Clear-to-Send

 

 

 

 

 

 

6

DSR

CC

107

DCE

Data Set Ready

 

 

 

 

 

 

7

SG

AB

102

Signal Ground

 

 

 

 

 

 

8

LSD

CF

109

DCE

Line Signal Detect

 

 

 

 

 

 

9

+10V

Reserved for test purposes (may be used to drive one RS-232

 

 

 

 

 

load)

 

 

 

 

 

 

10

–10V

Reserved for test purposes (may be used to drive one RS-232

 

 

 

 

 

load)

 

 

 

 

 

 

11

Unassigned

 

 

 

 

 

 

12

CT112

CI

112

DCE

Data Signal Rate Select

 

 

 

 

 

 

13

Reserved for future function

 

 

 

 

 

 

14

Reserved for future function

 

 

 

 

 

 

15

TXC

DB

114

DCE

Transmit Clock

 

 

 

 

 

 

16

Reserved for future function

 

 

 

 

 

 

17

RXC

DD

115

DCE

Receive Clock

 

 

 

 

 

 

18

CT141

LL

141

DTE

Local Loopback

 

 

 

 

 

 

20

DTR

CD

108

DTE

Data Terminal Ready

 

 

 

 

 

 

21

CT140

RL

140

DTE

Remote Loopback

 

 

 

 

 

 

22

RI

CE

125

DCE

Ring Indicator

 

 

 

 

 

 

23

CT111

CH

111

DTE

Data Rate Selector

 

 

 

 

 

 

24

XTXC

DA

113

DTE

External Clock

 

 

 

 

 

 

25

TEST

TM

142

DCE

Test Mode

 

 

 

 

 

 

3810-A2-GB30-30

September 1998

E-3

Page 184
Image 184
Paradyne 3800 manual Table E-3 EIA-232-D Pin Assignments RS-232 Name, Signal Circuit Function Pin Source

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