User guide

45 Mbps Backhaul User Guide
Issue 3, December 2004 Page 77 of 113
7.1.2 Ethernet
The Ethernet LED is driven from the ODU processor and thus is capable of informing you of many conditions
using different flash sequences. If the Ethernet indicator does not illuminate at all there are four possible
conditions.
1. There is no power reaching the ODU because of a wiring fault
2. The ODU is faulty
3. The PIDU is faulty
4. The Ethernet network side is faulty
Look at the following table to check the LED response for power up, disconnect the power and reapply and note
what happens.
Differentiating between 1--3 and 4 can be achieved by removing the power for 1 second. Watch the Ethernet
indicator for 1 minute, if it never flashes then the problem is 1—3. Take the jumper (J906) out of the PIDU and
check the current taken by the ODU. This should be 300mA to 1A when starting through to running normally.
If the Ethernet indicator flashes to begin with but then stops flashing then 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
Green LED
Yellow LED
No Ethernet Cable
Connected
Yellow LED
Ethernet Cable
Connected between
PIDU and
NIC/Switch/Hub
No Power Applied
Off
Off
Off
Power Applied
On
Will flash once per
second regularly
approximately 16
seconds after power
applied for 10
seconds then will go
out and stay out
Will flash once per
second regularly
approximately 16
seconds after power
applied for 10
seconds then
operate as Ethernet
Link/Activity LED
Valid Ethernet Link
and no traffic
On
N/A
Will be on solid for a
valid link.
Valid Ethernet Link
with traffic
On
N/A
Will be on solid, but
will blink randomly as
traffic passes through
While Reset Switch
Pressed
On
Off
Off
Reset Switch
Pressed and
released within 10
seconds during
normal operation
On
Off
Off while switch
pressed but returns
to LINK/Activity state
when released. No
reset will take place