Comtech EF Data SMS-758 - Manual (Page 102)

Theory of Operation SMS-758 Modem Protection Switch
4–42 MN/SMS758 Rev. 3
DATA PATH
SELECTION
TRANSMIT DATA
TRANSMIT ESC
RECEIVE DATA
RECEIVE ESC
RECEIVE EXTERNAL REFERENCE CLOCK
MOD AND DEMOD FAULTS
DECODER
INSTRUCTION
BACKUP
DATA I/O
DATA SWITCH
MOTHERBOARD
MOD RELAYS
DEMOD RELAYS
Figure 4-15. Backup 2:N IBS Interface Switch (1694)