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C-6
7975-A2-GB20-40December 1998
EIA-530A-to-X.21 Interface Cable
The EIA-530A-to-X.21 adapter cable (Figure C-3) provides the X.21 interface
shown in Table C-3.
98-15883
2
14
3
16
17
9
4
19
8
10
7
24
11
2
9
4
11
6
13
3
10
5
12
8
7
14
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
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
530
SIGNAL
DB25
PLUG
DB15
SOCKET
X.21
SIGNAL
495-14787
Figure C-3. EIA-530A-to-X.21 (Cable Feature Number 7900-F1-505)