ADCP-50-304 • Issue 19 • June 1999 • Section 2: Functional Description

Table 2-3. RS-232 Modem Terminal Interface

PIN

NAME

SOURCE

FUNCTION

CIRCUIT CCITT/EIA

1

FG

—

Frame Ground

101

(AA)

 

 

 

 

 

 

2*

TD

DTE

Transmitted Data

103

(BA)

 

 

 

 

 

 

3*

RD

DCE

Received Data

104

(BB)

 

 

 

 

 

 

4*

RTS

DTE

Request To Send

105

(CA)

 

 

 

 

 

 

5*

CTS

DCE

Clear To Send

106

(CB)

 

 

 

 

 

 

6*

DSR

DCE

Data Set Ready

107

(CC)

 

 

 

 

 

 

7

SG

—

Signal Ground

102

(AB)

 

 

 

 

 

 

8*

DCD

DCE

Data Carrier Detect

109

(BA)

 

 

 

 

 

 

9

 

DCE

Positive DC Test Voltage

 

 

 

 

 

 

 

 

10

 

DCE

Negative DC Test Voltage

 

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

12

SRLSD

DCE

Sec Data Carrier Detect

122

(SCF)

 

 

 

 

 

 

13

(S)CTS

DCE

Sec Clear To Send

121

(SCB)

 

 

 

 

 

 

14

STD

DTE

Sec Transmittal Data

128

(SBA)

 

 

 

 

 

 

15

TC

DCE

Transmitter Clock

114

(DB)

 

 

 

 

 

 

16

SRD

DCE

Sec Received Data

119

(SBB)

 

 

 

 

 

 

17

RC

DCE

Receiver Clock

115

(DD)

 

 

 

 

 

 

18

 

 

 

 

 

 

 

 

 

 

 

 

LL

DTE

Local Loopback

141

(LL)

 

 

 

 

 

 

19

SRTS

DTE

See Request To Send

120

(SCA)

 

 

 

 

 

 

20*

DTR

DTE

Data Terminal Ready

108/2

(CD)

 

 

 

 

 

 

21*

SQ

DCE

Signal Quality Detect

110

(CG)

 

 

 

 

 

 

22

RI

DCE

Ring Indicator

125

(CE)

 

 

 

 

 

 

23

 

DTE

Data Rate Selector

111

(CH)

 

 

 

 

 

 

 

 

 

Data Rate Selector

112

(CI)

 

 

 

 

 

 

24

ETC

DTE

Ext Transmitter Clock

113

(DA)

 

 

 

 

 

 

25

TM

DCE

Test Mode

142

(TM)

 

 

 

 

 

 

Page 2-10

© 1999, ADC Telecommunications, Inc.