Paradyne 3172 Operator's Manual page 134

ACCULINK 3172 and 3174 E1 DSU/CSU
EIA-530-A-to-X.21
Cable Interface
The EIA-530-A-to-X.21 adapter (Figure D-7) provides
the X.21 interface shown in
530
SIGNAL
TD-A
TD-B
RD-A
RD-B
RXC-A
RXC-B
RTS-A
RTS-B
RLSD-A
RLSD-B
SIG. COMMON
TT-A
TT-B
D-12
Table D-8.
DB25
PLUG
2
14
3
16
17
9
4
19
8
10
7
24
11
Figure D-7. EIA-530-A-to-X.21 Adapter
SOCKET
March 1999
X.21
DB15
SIGNAL
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
495-14787
3170-A2-GB20-30