RAD Data comm ASMi-52 Manuale Utente
Appendix A Interface Connector Specifications
Installation and Operation Manual
A-2
DTE Interface Connectors
ASMi-52 Ver. 2.5
Table A-1. V.35, X.21 and RS-530 Connector Pinouts (Cont.)
V.35
RS-530
X.21
Description
34-Pin
DB-25
DB-15
Signal
Function
Pin
Circuit
Pin
Circuit
Pin
Circuit
(Function)
Data Set
Ready
Ready
E DSR
107
6
22
CC(A)
CC(B)
A positive level from ASMi-52
when power is on, and ASMi-52
is (a) not in DIGITAL LOOP
when power is on, and ASMi-52
is (a) not in DIGITAL LOOP
mode, or (b) has not received a
REMOTE LOOPBACK signal
from the remote unit.
REMOTE LOOPBACK signal
from the remote unit.
Data
Terminal
Ready
Terminal
Ready
H DTR
108
20
23
CD(A)
CD(B)
Not
used
Carrier
Detect
Detect
F DCD
109
8
10
CF(A)
CF(B)
5
12
I(A)
I(B)
(Indication)
A positive level from ASMi-52,
except when a loss of the
except when a loss of the
received signal is detected or
when Data Set Ready is
negative.
when Data Set Ready is
negative.
External
Transmit
Clock
Clock
U
W
SCTE(A) 113
SCTE(B) 113
24
11
DA(A)
DA(B)
7
14
(A)
(B)
A serial data rate clock input
from the data source. Positive
clock translations must
correspond to data
clock translations must
correspond to data
transmissions.
Transmit
Clock
Y
a
SCT(A) 114
SCT(B) 114
15
12
DB(A)
DB(B)
6
13
S(A)
S(B)
(Signal
Timing)
(Signal
Timing)
A transmit data rate clock for
use by an external data source.
Positive clock translations
correspond to data translations.
Positive clock translations
correspond to data translations.
Receive
Clock
Clock
V
X
SCR(A)
115
115
SCR(B)
115
115
17
9
DD(A)
DD(B)
DD(B)
A receive data rate clock output
used by an external data sink.
used by an external data sink.
Positive clock translations
correspond to data translations.
correspond to data translations.
Local Analog
Loop
Loop
L and j
18
LL
A control signal input, which,
when on, sets ASMi-52 into
when on, sets ASMi-52 into
Local Analog Loopback (V.54
Loop 3).
Loop 3).
Remote
Digital Loop
Digital Loop
N and h
21
RL
A control signal input which,
when on, commands
when on, commands
ASMi-52 to send a remote
Loopback command (V.54 Loop
2) to the remote ASMi-52.
Loopback command (V.54 Loop
2) to the remote ASMi-52.
Test
Indicator
Indicator
n and k
25
TM
A Control Signal output from
ASMi-52; positive during any
ASMi-52; positive during any
test mode.