Comtech EF Data SDM-9000, Installation And Operation Manual

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Installation SDM-9000 Satellite Modem
2–10 Rev. 4
2.4.8.1 G.703 (IDR) Interface (J8) (Audio Mode)
Signal Function Name Pin #
Ground GND 1, 2
8 kbit/s TX data input (RS-422) TXD–A 37
TXD–B 38
8 kHz TX clock output (RS-422) TXC–A 21
TXC–B 22
1 kHz TX octet input (RS-422) TXO–A 4
TXO–B 5
8 kbit/s RX data output (RS-422) RXD–A
RXD–B 39
40
8 kHz RX clock output (RS-422) RXC–A 23
RXC–B 24
1 kHz RX octet output (RS-422) RXO–A 6
RXO–B 7
ADPCM 1 audio input A1I–A 45
A1I–B 29
ADPCM 1 audio output A1O–A 46
A1O–B 30
ADPCM 2 audio input A2I–A 47
A2I–B 31
ADPCM 2 audio output A2O–A 48
A2O–B 32
Backward alarm 1 output BWO1–C 8
(Note 1)
BWO1–NC 25
BWO1–NO 41
Backward alarm 2 output BWO2–C 9
(Note 1)
BWO2–NC 26
BWO2–NO 42
Backward alarm 3 output BWO3–C 10
(Note 1)
BWO3–NC 27
BWO3–NO 43
Backward alarm 4 output BWO4–C 11
(Note 1)
BWO4–NC 28
BWO4–NO 44
Backward alarm 1 input BWI1 12
(Note 2)
Backward alarm 2 input BWI2 13
(Note 2)
Backward alarm 3 input BWI3 14
(Note 2)
Backward alarm 4 input BWI4 15
(Note 2)
Modulator fault (TTL) MF 49
(Note 3)
Demodulator fault (TTL) DF 33
(Note 3)
Deferred maintenance alarm DMA 17
(Note 3)
Demodulator fault relay DF–C 16
(Note 4)
DF–NO 50
AGC output
(receive input, if level) AGC–OUT 3