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DMD50 Universal Satellite Modem
Pin No.
22
Data Mode B (+)
23
Data Terminal Ready B (+)
24
Terminal Timing A (-)
25
No Connection
5.4.11
REMOTE (J20)
The Remote Port is a RS-485 or RS-232 Connection for remote monitor and control of the
modem. It is a 9-Pin Female "D" Connector. Refer to Table 5-5 for pinouts.
Table 5-5. Remote Port (RS-485 or RS-232) 9-Pin Female "D" Connector (J20)
Pin No.
1
2
3
4
5
6
7
8
9
When operating the remote port as RS232 using a cable pinned 1 for 1 may cause
communication failures due to miss routing of standard RS232 com port signals.
When operating the remote port as RS232, the cable used should only have pins 2, 3
and 5 connected.
5.4.12
ETHERNET (J21)
The ETHERNET Port (J21) can be used for the Monitor & Control (M&C) Functions of the unit.
The physical interface is a standard female RJ-45 Connector.
5.5
G.703 IDR/IBS Interface (Optional)
The DMD50 supports two versions of the G703 IDR/IBS interface.
Interface options are G703 T1/E1/T2/E2 or G703 T1/E1/T2/E2/E3/T3 and STS1.
MN-DMD50 Revision 4
Signal Name
Signal Name
Transmit Data RS-485 (+)
Transmit Data RS-232
Receive Data RS-232
NC
Ground
Transmit Data RS-485 (–)
NC
Receive Data RS-485 (+)
Receive Data RS-485 (–)
Signal
Direction
DM-B
TR-B
TT-A
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Signal
Direction
TX-485-B
Output
TXD-232
Output
RXD-232
Input
NC
GND
TX-485-A
Output
No Connection
RX-485-B/CTS
Input
RX-485-A
Input
Rear Panel Interfaces
Output
Input
Input
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5–6
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