RAD Data comm ASMi-52 Manuel D’Utilisation
ASMi-52 Ver. 2.5
DTE Interface Connectors
A-1
Appendix A
Interface Connector
Specifications
Interface Connector
Specifications
A.1 DTE Interface Connectors
V.35, X.21 and RS-530 Interface Connectors
The V.35 interface of the ASMi-52 modem terminates in a 34-pin female
connector. The X.21 interface terminates in a 15-pin, D-type female connector.
The RS-530 interface terminates in a 25-pin, D-type female connector.
connector. The X.21 interface terminates in a 15-pin, D-type female connector.
The RS-530 interface terminates in a 25-pin, D-type female connector.
Table A-1
lists the pin assignment of the V.35, X.21 and RS-530 interface connectors.
Table A-1. V.35, X.21 and RS-530 Connector Pinouts
V.35
RS-530
X.21
Description
34-Pin
DB-25
DB-15
Signal
Function
Pin
Circuit
Pin
Circuit
Pin
Circuit
(Function)
(Function)
Protective
Ground
Ground
A Frame
101
1
1
----
(Shield)
(Shield)
Chassis Ground. It may be
isolated from Signal Ground.
isolated from Signal Ground.
Signal
Ground
Ground
B Signal
102
GND
7 AB
8 ----
(GND)
Common signal and DC power
supply ground.
supply ground.
Transmitted
Data
Data
P
S
TD(A) 103
TD(B) 103
2
14
BA(A)
BA(B)
2
9
T(A)
T(B)
(Transmit)
(Transmit)
Serial digital data from DTE. In
sync applications, the data
translations must occur on the
sync applications, the data
translations must occur on the
rising edge of the transmit clock.
Received
Data
Data
R
T
RD(A) 104
RD(B) 104
3
16
BB(A)
BB(B)
4
11
R(A)
R(B)
(Receive)
R(B)
(Receive)
Serial output from the modem
receiver. In sync applications,
the data translations occur on
receiver. In sync applications,
the data translations occur on
the rising edge of the clock.
Request to
Send
Send
C RTS
105 4
19
CA(A)
CA(B)
3
10
C(A)
C(B)
(Control)
A positive level to ASMi-52
when data transmission is
when data transmission is
required.
Clear to Send D
CTS 106
5
13
13
CB(A)
CB(B)
CB(B)
A positive level from
ASMi-52 with delay, after
receipt of Request to Send, and
when ASMi-52 is ready to
transmit.
receipt of Request to Send, and
when ASMi-52 is ready to
transmit.