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