Comtech EF Data SMS-758 - Manual (Page 19)

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