Paradyne Hotwire 7975 User Manual page 111

Table C-4. RS449 Cable Interface
Signal
Shield
Signal Ground
Receive Ground
Send Common
Send Data
Receive Data
Request-to-Send
Clear-to-Send
Receiver Ready
Data Mode
Terminal Ready
Terminal Timing
Send Timing
Receive Timing
Local Loopback
Remote Loopback
Test Mode
7975-A2-GB20-40
Circuit CCITT
Mnemonic Number
— —
SG 102A
RC 102B
SC —
SD 103
RD 104
RS 105
CS 106
RR 109
DM 107
TR 108/1, /2
TT 113
ST 114
RT 115
LL 141
RL 140
TM 142
December 1998
Cables and Pin Assignments
Direction Pin
— 1
— 19
— 20
— 37
To DSU/CSU 4 (A)
22 (B)
From DSU/CSU 6 (A)
24 (B)
To DSU/CSU 7 (A)
25 (B)
From DSU/CSU 9 (A)
27 (B)
From DSU/CSU 13 (A)
31 (B)
From DSU/CSU 11 (A)
29 (B)
To DSU/CSU 12 (A)
30 (B)
To DSU/CSU 17 (A)
35 (B)
From DSU/CSU 5 (A)
23 (B)
From DSU/CSU 8 (A)
26 (B)
To DSU/CSU 10
To DSU/CSU 14
From DSU/CSU 18
C-9