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CDM-Qx Satellite Modem Revision 5
External Connections MN/CDMQx.IOM
4–7
Note: The European EMC Directive (EN55022, EN50082-1) requires using properly shielded cables for
DATA I/O.
4.4 Chassis Connections
4.4.1 USB Port
This port is used to reflash firmware.
IMPORTANT
For continued operator safety, always replace the fuses with the correct type and
rating.
4.4.2 M&C 10/100BaseT Connector
The M&C 10/100BaseT connector is an 8-pin RJ-45 10/100BaseT Ethernet port
providing access to the modem’s management functions.
4.4.3 485/232 Connector
The 485/232 connectors are a 9-pin 'D' type male (DB9-M). Access is provided to remote
control ports of the modem, using both RS-232 and RS-485.
Table 4-2. Remote Control Interface Connector Pin Assignments
Pin # Description Direction
1 Ground
2 RS-232 TX Data Out
3 RS-232 RX Data In
4 Reserved - do not connect to this pin
5 Ground
6 RS-485 RX Data B * In
7 RS-485 RX Data A * In
8 RS-485 TX Data B Out
9 RS-485 TX Data A Out
*Use for 2-wire RS-485 operation