Rear Panel; Figure 4-2. Rear Panel - Comtech EF Data CDM-Qx Installation And Operation Manual

CDM-Qx Satellite Modem
External Connections
4.3

Rear Panel

The rear panel can be customized to meet the customer's requirements. Figure 4-2 shows
three configurations that are available. Table 4-1 lists their connectors and Figure 4-2
shows the locations.
Prime Power & Control
Configuration #1
Configuration #2
Configuration #3
Notes:
1. One interface per Modem (i.e. Modulator and Demodulator card combination) or one interface
per Modulator card and Demodulator card are required if used independently.
2. When grouping a modulator and demodulator together to use as a modem, the modulator must be
located above the demodulator.
3. For redundant operation the backup unit does not need an interface.
4. For redundant operation the backup unit needs to be located in the lower right hand slot (#4) for
single module redundancy. For modem redundancy the backup units must be located in the right
hand slots (#3 & #4).
Slot 1
Slot 2
Modem 1 with G.703 T1/E1 Balanced (DB-15)
Modem 2 with EIA-422 (DB-25)
Modem 1 with G.703 T1/E1 Unbalanced (BNC)
Modem 2 with EIA-422 (DB-25)
Modem 1 with G.703 T1/E1 Balanced (DB-15) and
Quad E1 Interface Module, 1-4 Ports of E1, with D&I (4) RJ-45

Figure 4-2. Rear Panel

4–3
Revision 6
MN/CDMQx.IOM
Slot 3
IF I/O
Slot 4