No Ethernet Activity; Figure 123 - Ptp Lpu Test Points - Motorola PTP 600 Series User Manual

3. If either test fails, replace or repair the RJ45 cable.

11.1.4 No Ethernet Activity

If the Ethernet LED did flash 10 times but then went off, check that the RJ45 connection from
the LAN port of the PIDU to the PC is working. If the PC connection is working, perform the
following tests on the RJ45 cable that connects the PIDU to the LPU or ODU:
1. Check that the wiring to pins 1&2 and 4&6 is correct. For example, the wiring to pins
1 and 3 may be crossed.
2. If this test fails, replace or repair the RJ45 cable.
Figure 131 - PTP LPU Test Points
228
11 Troubleshooting (Fault Finding)