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A. Connectors, Cables, and Pin Assignments
EIA-530-A to X.21 Interface
The EIA-530-A to X.21 adapter (4800-F1-502) or adapter cable (4800-F1-503)
are DB25-to-DB15 connectors that, connected to the V.35/X.21 port of the
4804 Management Module, provide the X.21 interface shown in
Cable
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
Figure A-3.
A-6
Interface.
Pin 25
Pin 1
DB25
SOCKET
2
14
3
16
17
9
4
19
8
10
7
24
11
EIA-530-A to X.21 Adapter and Adapter Cable Pinouts
April 2002
Pin 1
02-17090
Pin 15
X.21
DB15
PLUG
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
Table A-5, X.21
02-17091
4821-A2-GN20-00
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