...................................................................................................................................................................................................
3
Ensure that the source is compatible with the port and that it is on. Check that the source
is a compatible type (for example, if you are expecting a single-mode fiber signal (either
1310 or 155x nm), check that the source is not a multi-mode fiber signal (typically 850
nm).
...................................................................................................................................................................................................
4
Query the source of the signal for a reading of its output power (please refer to source
equipment manufacturer's procedures). If this is not possible, carefully remove the fiber
from the transmit port of the source card and verify the output power using an optical
power meter.
If... Then...
the output power is within acceptable limits, continue with Step 5.
the
output power is not within acceptable
limits,
the problem is with the source. Follow the
instructions on debugging from the source
equipment manufacturer.
...................................................................................................................................................................................................
5
Ensure that the administrative state of the port is Admin Up. If it is Up, then toggle the
administrative state from UP >DOWN > UP.
CLI show interface
<shelf slot port>
WEBUI From the Equipment Tree, select the card, and select the desired port.
...................................................................................................................................................................................................
6
Remove the fiber from the receive port where the LOS is raised and measure the optical
power.
If... Then...
the optical power is below the required
threshold,
using the standard optical fiber jumper
cleaning procedure, clean the fiber, and
measure the power again.
the optical power is within the required limits, clean the receive connector on the card.
If the LOS condition is still present, the problem may be with the card.
...................................................................................................................................................................................................
7
Perform a warm reset of the card exhibiting the Loss of Signal.
CLI config card card type shelf slot reset warm
Trouble-clearing procedures
LOS
LOS (Loss of signal)
....................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................
2-158
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
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