Pin Assignments
D-113163-A2-GB20-10 March 1999
EIA-530-A-to-X.21 Adapter

The EIA-530-A-to-X.21 adapter (Figure D-8) provides

the X.21 interface shown in Table D-7.

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 D-8. EIA-530-A-to-X.21 Adapter