Paradyne 3172 Operator's Manual page 130

Signal Common
Transmitted Data
Received Data
Request-to-Send
Data Channel Received Line Signal Detector
Transmit Signal Element Timing (DTE Source)
Receiver Signal Element Timing (DCE Source)
3170-A2-GB20-10
Table D-8
X.21 Cable Interface
Signal
March 1996
CCITT
Direction
Number
102 —
103 To DSU/CSU
104 From DSU/CSU
105 To DSU/CSU
109 From DSU/CSU
113 To DSU/CSU
115 From DSU/CSU
Pin Assignments
Pin
8
2 (A)
9 (B)
4 (A)
11 (B)
3 (A)
10 (B)
5 (A)
12 (B)
7 (A)
14 (B)
6 (A)
13 (B)
D-13