Comtech EF Data SMS-458B - Manual (Page 17)

1–1
Chapter 1. INTRODUCTION
This chapter describes the SMS-458B Modem Protection Switch (Figure 1-1), referred to
in this manual as “the switch,”.
1.1 Overview
The SMS-458B Modem Protection Switch is a rack-mounted unit that provides
independent backup control for modulators and demodulators, or simultaneous modulator
and demodulator (modem) switching. The switch limits the loss of communication if a
primary modem element failure occurs.
Figure 1-1. SMS-458B