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CDM-Qx Satellite Modem Revision 5
External Connections MN/CDMQx.IOM
4–11
4.4.8 Quad E1 Data Interface Connectors
The (2) Data connectors on the Quad E1 interface card are 9-pin ‘D’ type female (DB-
9F). Refer to Table 4-xx for pin assignments. J1 and J2 are shown below. Also available
is an adapter y-cable to adapt the DB9 to (2) RJ45 jacks, (part number PL/xxxTBD), see
Table xx and figure xx.
Table 4-xx6. Quad E1 Data Interface J1 Connector Pin Assignments
Pin # Signal Function Name Direction
5 DDI (+) Port1_Tx+ In
9 DDI (-) Port1_Tx– In
4 IDO (+) Port1_Rx+ Out
8 IDO (-) Port1_Rx– Out
3 Ground Gnd -
7 DDI (+) Port2_Tx+ In
2 DDI (-) Port2_Tx– In
6 IDO (+) Port2_Rx+ Out
1 IDO (-) Port2_Rx– Out
Table 4-xx7. Quad E1 Data Interface J2 Connector Pin Assignments
Pin # Signal Function Name Direction
5 DDI (+) Port3_Tx+ In
9 DDI (-) Port3_Tx– In
4 IDO (+) Port3_Rx+ Out
8 IDO (-) Port3_Rx– Out
3 Ground Gnd -
7 DDI (+) Port4_Tx+ In
2 DDI (-) Port4_Tx– In
6 IDO (+) Port4 Rx+ Out
1 IDO (-) Port4_Rx– Out
Table 4-xx8. Ext Ref Clock Interface J3 Connector Pin Assignments
Pin # Signal Function Name Direction
5 E1 Ref Clock In (+) Ref_Clk_In (+) In
9 E1 Ref Clock In (-) Ref_Clk_In (+) In
4 Not used -- --
8 Not used -- --
3 Ground Gnd -
7 Not used -- --
2 Not used -- --
6 E1 Ref Clock Out (+) Ref_Clk_Out (+) Out
1 E1 Ref Clock Out (-) Ref_Clk_Out (+) Out