ECI XDM-300, Installation And Maintenance Manual

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Connectors Pin Assignment XDM-300 Installation and
Maintenance Manual
A-8 ECI Telecom Ltd. Proprietary 417006-2311-0H3-A00
T3_1/T4_1 and T3_2/T4_2 Connectors
The T3_1/T4_1 and T3_2/T4_2 connectors are 9-pin D-type male connectors,
each including two groups of lines:
| Clock input (T3 2.048 MHz signal, ITU-T Rec. G.703 interface)
| Clock output (T4 2.048 MHz signal, ITU-T Rec. G.703 interface)
The MAIN connector serves the main TMU, and the PROTECT connector
serves the standby (protection) TMU. They are connected to the site timing
reference distribution subsystem.
The following figure identifies the connector pins as seen when looking into
the connector, and the table lists their pin assignment.
Figure A-3: T3_1/T4_1 and T3_2/T4_2 connectors pin identification
Table A-5: T3_1/T4_1 and T3_2/T4_2 connectors pin assignment
Pin Name Function Direction
1 SHIELD Shield -
2 CK_2M_MIL Clock input, low Input
3 SHIELD Shield -
4 CK_2M_MOL Clock output, low Output
5 — Not connected -
6 CK_2M_MIH Clock input, high Input
7 SHIELD Shield -
8 CK_2M_MOH Clock output, high Output
9 — Not connected -