Specifications

DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces
MN-DMD20-20LBST Revision 14 5–12
5.5.9 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 5-9 for pinouts.
Table 5-9. Remote Port (RS-485 or RS-232) 9-Pin Female “D” Connector (J20)
Pin No. Signal Name Signal Direction
1 Transmit Data RS-485 (+) TX-485-B Output
2 Transmit Data RS-232 TXD-232 Output
3 Receive Data RS-232 RXD-232 Input
4 NC NC ---
5 Ground GND ---
6 Transmit Data RS-485 (–) TX-485-A Output
7 NC No Connection ---
8 Receive Data RS-485 (+) RX-485-B/CTS Input
9 Receive Data RS-485 (–) RX-485-A Input
5.5.10 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.
Refer to Appendix E and F for proper setup of the TCP-IP interface and Web Browser Setup.
5.6 DMD20/DMD20 LBST Optional Data Interfaces
5.7 IDR/IBS Interface (Optional)
Refer to Figures 5-1 and 5-2 for rear panel configurations.