Checking Your Wiring - Motorola PTP 300 series User Manual

Differentiating between 1-3 and 4 can be achieved by removing the power for 1 second. Watch
the Ethernet indicator for 1 minute while power is removed, if it never flashes then the problem is
1-3. Take the jumper (J905) out of the PIDU Plus and check the current taken by the ODU. This
should be 300mA to 1A when starting to run normally.
If the Ethernet indicator flashes to begin with but then stops flashing, the ODU is powered and
software loaded but Ethernet connectivity has been lost between the ODU and the users connected
equipment. All Ethernet connections should be rechecked.
Power Indoor Unit LED check chart:
Mode
No Power Applied
Power Applied
Valid Ethernet Link and
no traffic
Valid Ethernet Link with
traffic
Recovery Switch Pressed
and held for greater than
10 seconds from power on
(Recovery is pressed
while power is applied)

10.1.3 Checking your wiring

If the above procedures fail to diagnose the issue you may have a wiring fault. Unplug the RJ45
from the PIDU+ and check the following resistances at the RJ45:
1. Check the cable resistance between pins 1 & 2, 3 & 6, 4 & 5 and 7 & 8 at the RJ45.
2. Check against column 2 in
other.
3. Check the cable resistance between pins 1 & 3 at the RJ45. Check against column 3 in
Table 20.
Fault Finding
Green LED Yellow LED No Ethernet
Cable Connected
Off Off
On Will flash once per
second regularly
approximately 30 seconds
after power applied for
10 seconds then will go
out and stay out
On N/A
On N/A
On Off while switch pressed. Approximately 30 seconds
after releasing the switch, flashes twice per second
regularly for 10 seconds, then boots in "Recovery
Mode" While in "Recovery Mode" the unit will only
be accessible via the IP address 169.254.1.1.
Table 20. Resistances for each pair should be within 1 ohm of each
126
Yellow LED Ethernet
Cable Connected
between PIDU Plus and
NIC/Switch/Hub
Off
Will flash once per
second regularly
approximately 30 seconds
after power applied for
10 seconds then operate
as Ethernet
Link/Activity LED
Will be on solid for a
valid link.
Will be on solid, but will
blink randomly as traffic
passes through.