Comtech EF Data SMS-758 - Manual (Page 96)

Theory of Operation SMS-758 Modem Protection Switch
4–36 MN/SMS758 Rev. 3
Backward Alarm 3 In BWI3 14
Backward Alarm 4 In BWI4 15
ADPCM 1 Audio In A1I-A
A1I-B 45
29
ADPCM 1 Audio Out A1O-A
A1O-B 46
30
ADPCM 2 Audio In A2I-A
A2I-B 47
31
ADPCM 2 Audio Out A2O-A
A2O-B 48
32
Demod Fault Relay DF-C
DF-NO 16
50
Modulator Fault MF 49
Demodulator Fault DF 33
Deferred Maintenance Alarm DMA 17
Note: MF and DF inputs are only on the prime and backup modem interface connectors,
not on the terrestrial data connector.