Paradyne 7974 User Manual page 148

Cables and Pin Assignments
EIA-530-A-to-X.21 Interface
SIG. COMMON
C-8
The EIA-530-A-to-X.21 adapter cable (Figure C-4) provides the X.21 interface
shown in Table C-5.
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
Figure C-4. EIA-530-A-to-X.21 (Cable Feature Number 7900-F1-505)
August 2000
98-15883
DB15 X.21
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
7900-A2-GB21-00
495-14787