Paradyne 3162 User Manual page 153

EIA-530-A-to-X.21 Adapter
The EIA-530-A-to-X.21 adapter (Figure D-9) provides the X.21 interface shown in
Table
SIG. COMMON
Figure D-9.
3162-A2-GB20-40
D-7.
530 DB25
SIGNAL PLUG
TD-A 2
TD-B 14
RD-A 3
RD-B 16
RXC-A 17
RXC-B 9
RTS-A 4
RTS-B 19
RLSD-A 8
RLSD-B 10
7
TT-A 24
TT-B 11
EIA-530-A-to-X.21 Adapter
Table D-7. 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
Pin Assignments
X.21
DB15
SIGNAL
SOCKET
2 TD-A
9 TD-B
4 RD-A
11 RD-B
6 RXC-A
13 RXC-B
3 RTS-A
10 RTS-B
5 RLSD-A
12 RLSD-B
8 SIG. COMMON
7 TT-A
14 TT-B
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
495-14787
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