Comtech EF Data SMS-758, Installation And Operation Manual

Page: 24 / 172

Introduction SMS-758 Modem Protection Switch
1–8 MN/SMS758 Rev. 3
PRIM
E
MO
D INP
U
T
S
IF
O
U
T
P
UT
S
J1
7
J
2
7
OFF-
L
INE
IF
O
U
T
P
U
T
S
75
75
UPLI
NK
1
UPLI
NK
2
75
IF
1 2 3 4 5 6
J2
8
J2
9
J3
0
J3
1
J3
2
J3
3
SMS
-758
MO
DULATO
R
SW
IT
C
H
1 2 3 4 5 6
J1
8
J1
9
J2
0
J2
1
J2
2
J2
3
75
T
X
IF
R
X
IF
PR
IM
E MO
D
E
M
S
1
DATA
A1 A2 A3 A4
J2 J2 J2 J2
PR
IM
E MO
D
E
M
INPU
T
S
SMS
-758
TE
R
M
IN
A
L
EQUI
PM
E
N
T
A1 A2 A3 A4
J1 J1 J1 J1
T
E
RR D
A
TA SW
IT
C
H
A5 A6 A7 A8
J1 J1 J1 J1
A5 A6 A7 A8 A9 A1
0
J2 J2 J2 J2
T
X
IF
R
X
IF
T
X
IF
R
X
IF
2 3
7 8
12
J2
6
J
3
6
J2
4
J2
5
75
75
75
7 8
BACKUP
M
O
D
INPU
T
S
J3
4
J3
5
75
75
75
DOW
N
LI
N
K
1
DOW
N
LI
N
K
2
SPLI
T
T
E
R
1:
6
T
X
IF
R
X
IF
4
T
X
IF
R
X
IF
BACKUP
M
O
D
E
M
S
1
SMS
-758
DE
M
O
D
BACKUP DE
M
O
D
S
1 2
J1
1
J1
6
DL1 DL2
J7 J8
DL3
J9
INPU
T
S
DO
W
N
LIN
K
SPLI
T
T
E
R
1:
6
75
75
75
75
IF
DL1 DL2
J1
2
J1
3
DL3 DL4 DL4
J1
4
J1
0
J1
5
SW
IT
C
H
T
X
IF
R
X
IF
2 NO
TE
: ALL UNU
S
E
D IF S
W
IT
CHING
CO
NN
E
C
TIO
N
S
MUS
T
BE
TE
RM
INATE
D
INTO
7
5
O
H
MS
.
Figure 1-6. Example System Configuration