RAD Data comm ASM-20 - Manual (Page 27)

ASM-20 Installation and Operation Manual Chapter 2 Installation and Setup
Setting Internal Jumpers and Switches 2-3
B
A
UD
RA
T
E
kb
ps
IN
T
EXT RC
V
ASY
XM
T
C
L
K
CH
A
S
S
DI
S
CO
N
RT
S
-C
T
S
DL
Y
(
m
s)
0 9 70
0 -
256
1 -
192
2 -
144
3 -
128
4 -
1
15.
2
5 -
1
12
6 -
96
7 -
72
8 -
64
9 -
57.
6
A -
5
6
B -
4
8
C
-
38.
4
D -
3
2
E -
2
8.
8
F
- 19.
2
V5
4
D
IS
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S
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R
RI
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R
ON CN
T
R
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F
SW
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N
.
LO
W
HI
G
H
EN DI
S
ON OF
F
0 d
bm
-6
d
bm
15
0
LO
W
EN DI
S
RC
V
IM
P
RC
V
L
V
L
RL
B
DT
E
RP
F.
X
M
T
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V
L
X
M
T
IM
P
AL
B D
T
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15
0
HI
G
H
1
2
3 4 5
6
7
8
0
9
A
B C D
E
F
ONON
3
2
1
OF
F
ON ON
ON
OF
F
OF
F
8 9 10
12 25
11
ON
ON
ON
STO P B IT
%
LN
1
B
IT
LN
0
J14
J12
J10
J9
SW2
J1 J2 J3
J6
J4
J7 J8
J11
J13
*
SW3
* J11 - Only for standalone option
Figure 2-1. PCB Layout Diagram
In certain locations where permanent excessive high voltages are present on
the lines, disconnecting the signal ground from the chassis ground may render
the unit unsafe for connection to unprotected telecommunication networks.
For applications using an X.21 interface external clock (DTE timing source), connect
the input clock to Pins 7(a) and 14(b) of the 15-pin connector. In X.21, one of the
modems should be set to RCV clock.
Table 2-1 specifies the strap selection settings. The jumper and switch identity
numbers correspond to PCB Layout Diagram (see Figure 2-1 ).
Warning
Note