D. Pin Assignments

Table D-8. RS-449 Cable Interface

 

Circuit

ITU-T

 

 

 

Signal

Mnemonic

Number

 

Direction

Pin

 

 

 

 

 

 

Shield

 

1

 

 

 

 

 

 

Signal Ground

SG

102A

 

19

 

 

 

 

 

 

Receive Ground

RC

102B

 

20

 

 

 

 

 

 

Send Common

SC

 

37

 

 

 

 

 

 

Send Data

SD

103

 

To DSU/CSU

4 (A)

 

 

 

 

 

22 (B)

 

 

 

 

 

 

Receive Data

RD

104

 

From

6 (A)

 

 

 

 

DSU/CSU

24 (B)

 

 

 

 

 

 

Request-to-Send

RS

105

 

To DSU/CSU

7 (A)

 

 

 

 

 

25 (B)

 

 

 

 

 

 

Clear-to-Send

CS

106

 

From

9 (A)

 

 

 

 

DSU/CSU

27 (B)

 

 

 

 

 

 

Receiver Ready

RR

109

 

From

13 (A)

 

 

 

 

DSU/CSU

31 (B)

 

 

 

 

 

 

Data Mode

DM

107

 

From

11 (A)

 

 

 

 

DSU/CSU

29 (B)

 

 

 

 

 

 

Terminal Ready

TR

108/1, /2

 

To DSU/CSU

12 (A)

 

 

 

 

 

30 (B)

 

 

 

 

 

 

Terminal Timing

TT

113

 

To DSU/CSU

17 (A)

 

 

 

 

 

35 (B)

 

 

 

 

 

 

Send Timing

ST

114

 

From

5 (A)

 

 

 

 

DSU/CSU

23 (B)

 

 

 

 

 

 

Receive Timing

RT

115

 

From

8 (A)

 

 

 

 

DSU/CSU

26 (B)

 

 

 

 

 

 

Local Loopback

LL

141

 

To DSU/CSU

10

 

 

 

 

 

 

Remote Loopback

RL

140

 

To DSU/CSU

14

 

 

 

 

 

 

Test Mode

TM

142

 

From

18

 

 

 

 

DSU/CSU

 

 

 

 

 

 

 

D-10

February 2001

3160-A2-GB21-90

Page 208
Image 208
Paradyne 3165-A2, 3164-A2, 3160-A3, 3161-B3 Table D-8. RS-449 Cable Interface Circuit, Signal Mnemonic Number Direction Pin