A.3 x.21 dce connector – RAD Data comm ASMI-450 User Manual
Page 102
Connector Wiring
A-4
ASMi-450 Installation and Operation Manual
A.3 X.21 DCE Connector
When the ASMi-450 is ordered with an X.21 interface, the physical interface is
a 15-pin female D-type connector wired in accordance with Table A-4.
Table A-4. DCE Connector, X.21 Interface
Pin Designation
Direction
Function
1
FG
↔
Frame Ground
2
TA
To ASMi-450
Transmit Data - wire A
3
CA
To ASMi-450
Control - wire A
4
RA
From ASMi-450
Receive Data - wire A
5
IA
From ASMi-450
Indication Data - wire A
6
SA
From ASMi-450
Signal Timing - wire A
7
BA
To ASMi-450
External Timing - wire A
8
G
↔
Signal Ground
9
TB
To ASMi-450
Transmit Data - wire B
10
CB
To ASMi-450
Control - wire B
11
RB
From ASMi-450
Receive Data - wire B
12
IB
From ASMi-450
Indication Data - wire B
13
SB
From ASMi-450
Signal Timing - wire B
14
BB
To ASMi-450
External Timing - wire B
15
–
N/A
Not Connected