Motorola PTP 500 User Manual download pdf (Page 15)

The correct operation is as follows

1. Connect the RJ45 to the PIDU Plus and apply power to the PIDU Plus, the green

power LED should illuminate continuously.

2. 30 seconds after powering, the orange Ethernet LED should be observed starting

with 10 slow flashes.

3. If there is a local network connection plus traffic the Ethernet LED will light solidly

and flicker to show Ethernet activity.

If the system does not operate correctly, refer to the fault finding guide below.

Fault Finding Guide

The PIDU green power LED does not illuminate

Unplug the ODU connection from the PIDU and check the power LED illumination. If the

power LED still does not light then check the power source.

The PIDU green power LED flashes

A flashing power LED indicates that there is a short circuit on the output of the PIDU. Check

that pins 4&5 and 7&8 are not crossed with pins 1&2 and 3&6 on the RJ45, and check also

that there is a resistance greater than 100K ohms between pins 1&8.

The PIDU Ethernet orange LED flashes ten times but irregularly

Irregularly flashing, seen as a short gap followed by a long gap, indicates that the ODU has

booted in recovery mode. This can also indicate an installation wiring problem.

The PIDU Ethernet orange LED flashes ten times but does not show Ethernet activity

Failure of the Ethernet LED to show Ethernet activity can be due to wiring to pins 1&2 and

3&6 being incorrect, for example if the wiring to pins 1 and 3 are crossed.

Post-Power Testing and Fault Finding

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Motorola PTP 500 User Manual Page 15