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Paradyne 3162 DSU/CSU User Manual

Page 141

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Pin Assignments

D-9

3162-A2-GB20-30

March 1999

Table D-6.

RS449 Cable Interface

Signal

Circuit
Mnemonic

CCITT
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 DSU/CSU

6 (A)
24 (B)

Request-to-Send

RS

105

To DSU/CSU

7 (A)
25 (B)

Clear-to-Send

CS

106

From DSU/CSU

9 (A)
27 (B)

Receiver Ready

RR

109

From DSU/CSU

13 (A)
31 (B)

Data Mode

DM

107

From DSU/CSU

11 (A)
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 DSU/CSU

5 (A)
23 (B)

Receive Timing

RT

115

From DSU/CSU

8 (A)
26 (B)

Local Loopback

LL

141

To DSU/CSU

10

Remote Loopback

RL

140

To DSU/CSU

14

Test Mode

TM

142

From DSU/CSU

18