Table 4-1. Modem Rear Panel Connectors - Comtech EF Data CDM-Qx Installation And Operation Manual

CDM-Qx Satellite Modem
External Connections
5. In the example Configuration #1 above, because all modules have interfaces, the following
configurations are possible:
a. Two independent modulators - one with a G.703 balanced and the other with an EIA-530
interface, with two independent demodulators one with a G.703 balanced and the other
with an EIA-530 interface.
b. Two independent modems - one with a G.703 balanced and the other with an EIA-530
interface (located on the demodulators).
c. A 1:1 redundant modem, with the online unit configured with a G.703 interface. The off
line modules will provide the backup even with a different interface.
6. In the example Configuration #3 above, the Quad E1 Interface Module is used in Slots 3 and 4.
The modulator in Slot 1 is grouped with the demodulator in Slot 2. This unique combination
allows the user to select the Quad E1 interface or the data interface located in the modulator or
demodulator.
Name
Configuration #1 - Modem1 with G.703 T1/E1 Balanced (DB-15) Modem2 with EIA-422 (DB-25)
M&C 10/100BaseT
485/232
Slot #1 Mod:
Alarms
G.703
Slot #2 Demod:
Alarms
G.703
Slot #3 Mod:
Alarms
EIA-530
Slot #4 Demod:
Alarms
EIA-530
70/140 Tx /Rx:
Tx
Rx
Ref
AC Plug
Ground
Configuration #2 - Modem 1 with G.703 EIA-422(DB-25) Modem2 with G.703 T1/E1 Unbalanced (BNC)
M&C 10/100BaseT
485/232
Slot #1 Mod:
Alarms
G.703

Table 4-1. Modem Rear Panel Connectors

Ref. Desig. Connector Type
RJ-45
9-Pin D Male
15-Pin Male
15-Pin Female
15-Pin Male
15-Pin Female
15-Pin Male
25-Pin Female
15-Pin Male
25-Pin Female
BNC
BNC
BNC
IEC
#10-32 Stud
RJ-45
9-Pin D Male
15-Pin Male
BNC
Function
Remote Interface
Remote Interface
Form-C Alarms
Balanced G.703 Data Input
Form-C Alarms
Balanced G.703 Data Output, or Input/Output
Form-C Alarms
Data Input
Form-C Alarms
Data Output, or Input/Output
RF Output 75 or 50Ω
RF Input 75 or 50Ω
External Reference for Modem Synthesizers
Modem Power
Grounding
Remote Interface
Remote Interface
Form-C Alarms
Unbalanced G.703 Data Output (incorrect slot for IO)
4–4
Revision 6
MN/CDMQx.IOM