Comtech EF Data CDM-Qx, Installation And Operation Manual

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CDM-Qx Satellite Modem Revision 6
External Connections MN/CDMQx.IOM
4.4.8 Quad E1 Data Interface Connectors
The Quad E1 Data interface card allows the user to
connect 1 to 4 different terrestrial E1 ports. Each port
can be independently configured for full E1, (framed
or unframed E1 data), or fractional E1, (with D&I).
All ports of the Quad E1 must be synchronized to
each other. These 4, E1 RJ-45 ports are labeled J1 through J4 respectively on the
interface card.
The DB-9F, J5 connector on the interface card provides 2 functions. The first function is
to provide an output E1 clock for the user to use as an E1 clock reference, (if needed for
the terrestrial E1 equipment). The second purpose of the connector is to allow the user to
provide a reference E1 input clock. The user can then use this E1 clock input to drive the
demodulator receive buffer. See the section on (Config/Rx/Buf) – RX BUFFER CLOCK
SOURCE.
The (4) data connectors on the Quad E1 interface card are RJ-45. Refer to Table 4-6 for
pin assignments.
Table 4-6. Quad E1 Data Interface J1-J4 Connector Pin Assignments
Pin # Signal Function Name Direction
1 DDI (+) In
2 DDI (-) Port_Tx– In
3 Ground Gnd --
4 IDO (+) Out
5 IDO (-) Port_Rx– Out
6 Ground Gnd --
7 Unused NC --
8 Unused NC --
Table 4-7. Quad E1 Clock Interface J5, DB-9F Connector Pin Assignments
Pin # Signal Function Name Direction
1 E1 Clk Ref Out (-) E1 Clk Out (-) Out
2 Unused NC --
3 Ground Gnd --
4 Unused NC --
5 E1 Clk Ref In (+) E1 Clk In (+) In
6 E1 Clk Ref Out (+) E1 Clk Out (+) Out
7 Unused NC --
8 Unused NC --
9 E1 Clk Ref In (-) E1 Clk In (-) In
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