SMS-758 Modem Protection Switch
Introduction
MN/SMS758 Rev. 3
1–3
Redundant power supplies maintain switch operation even if one power supply fails. The
switch and modem configurations are stored in battery-backed memory devices, for
protection against power loss.
A block diagram of the switch is shown in Figure 1-5.
F 1
8
S M S -7 5 8 M O D E M P R O T E C T IO N
S W IT C H S W 1 .0 0 P R E S S N E X T
F 2
NXT
PR V
ENT
.
2
7
0
1
4
5
9
3
6
BATTERY
MOD
DEMOD
M:N
FA U LT S
S TAT U S
P OW ER
A UTO
LOCAL
REMOTE
B YPASS
S M S -7 58
M :N S W I T C H
Figure 1-1. SMS-758 Modem Protection Switch
