RAD Data comm ASM-20 - Manual (Page 65)

ASM-20
Installation and Oper
ation Manual
Appendix D D
TE Interface Co
nnectors
D
-3
Table D-
1.
Interface Signal List (Fe
m
ale Connect
ors) Pinout a
nd
Standard Signal
Name
s (C
ont.)
RS-232
V.35
EIA-530
X.21
Signal Func
tio
n
DB-25 Stand
alone
and F
rame
DB-25 Frame
34-pin Stand
alone
Pin Circ
uit
DB-25 Standalone and F
rame
Pin Circ
uit
DB-25 Frame
DB-15 Standalone Pin Circ
uit
[Func
tion]
Desc
ription
Carrier
Detect
8
8
F
DCD
109
8
CF(A)
10
CF(B)
8 10
5 I(A) 12
I(B)
[INDICATION]
A positive level
from the ASM-20,
except when a loss of the
received
signal is dete
cte
d, or when Data Set
Ready is negativ
e.
External Transm
it
Clock
24 19
16
U
S
C
TE(A)
113
W S
C
TE(B)
113
24
DA(A)
11
DA(B)
24 11
7 (A) 14
(B)
A serial data rate clock input
from the
data sou
rce. Po
sitiv
e clock
tran
sitions
must
correspon
d to data
transi
tions
.
Transmit Clock
15
14 10
Y SCT(A) 11
4
A S
C
T(B) 11
4
15
DB(A)
12
DB(B
)
15 12
6 S
(A)
13
S
(B)
[SIGNAL TIMING]
A transmi
t data
rate clock
for u
se by an
external data so
urce. Po
sitive clock
transi
tions
corre
spond to data
transi
tions.
Receive Clock
17
22 23
X S
C
R(B)
115
V
SCR(A) 115
17
DD(A)
9 DD(B)
A receive data clock output
for
use by
external data sink. Positive clock transi
tions
corre
spond to data
transi
tions.
Local Analog
Loop
18
18
L and j
141
18
LL
A control sig
nal
input; when on,
commands the
AS
M
-20 into Local
Analog Loopback (V.54 Loop 3).
See
Table
2-
2.
Remote Loopback
21
21
N and h 140
21
RL
A control sig
nal
input; when on,
commands the
AS
M
-20 to send a
remote Loopback command (V
.54
Loop 2) to the remote ASM-20. See Table
2-
2.
Test Indica
tor
25
25
n and k
142
25
TM
A control sig
nal
output f
rom the
ASM-2
0; pos
iti
ve du
ring any t
est
mode.