Paradyne 7974 User Manual page 149

7900-A2-GB21-00
Table C-5. X.21 Cable Interface
Signal
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)
August 2000
Cables and Pin Assignments
ITU-T
Number Direction
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
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)
C-9