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SDM-309B Satellite Modem
4.2.1.9.1 IBS Terrestrial Interface (J1)
The IBS terrestrial interface is provided on a 50 pin female "D" connector accessible
from the rear of the breakout panel. Screw locks are provided for mechanical security of
the mating connector.
GROUND
T1E1 SEND DATA
EXTERNAL CLOCK
T1E1 RECEIVE DATA
TERRESTRIAL TX DATA
SEND DATA
SERIAL CLOCK TX/SEND TIMING
TERRESTRIAL RX DATA
RECEIVE DATA
SERIAL CLOCK RX/RECEIVER TIMING
RS422 RX OCTET
SERIAL CLOCK TX EXT./TERMINAL
TIMING
REQUEST TO SEND
RECEIVE LINE SIGNAL
DETECT/RECEIVER READY
RS422 TX OCTET
CLEAR TO SEND
DATA SET READY/DATA MODE
TERRESTRIAL ESC DATA SET READY
PRIMARY ALARM
SECONDARY ALARM
4.2.1.9.2 RS422 Interface (J2)
The RS422 interface is provided on a 37 pin female "D" connector accessible from the
front of the break-out panel. Screw locks are provided for mechanical security of the
mating connector.
MN/U-SDM309B Rev. #
Signal Function
Signal Function
Name
GND
T1E1_SD-A
T1E1_SD-B
EXC-A
EXC-B
T1E1_RD-A
T1E1_RD-B
TXD
SD-A
SD-B
SCT/ST-A
SCT/ST-B
RXD
RD-A
RD-B
SCR/RT-A
SCR/RT-B
RS422RXO-A
RS422RXO-B
SCTE/TT-A
SCTE/TT-B
RTS-A
RTS-B
RLSD/RR-A
RR-B
RS422TXO-A
RS422TXO-B
CTS-A
CTS-B
DSR/DM-A
DM-B
TER_ESC_DSR
PRI_COM
PRI_NO
PRI_NC
SEC_COM
SEC_NO
SEC_NC
Name
Pin Number
M&C and Interfaces
Pin Number
1,2
34
18
35
19
36
20
5
37
38
21
22
7
39
40
23
24
8
9
12
13
45
29
46
30
14
15
47
31
48
32
41
10
43
27
11
44
28
4-4–19
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