2-109
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 2 Alarm Troubleshooting
2.6.172 RS-EOC
Step 2
If the
“LOF (STMN)” condition on page 2-82
Step 3
If the alarm does not clear on the reporting node, verify the physical connections between the cards and
that the fiber-optic cables are configured to carry RS-DCC traffic. If they are not, correct them. For more
information about STM-N fiber connections and terminations, refer to the “Install Cards and Fiber-Optic
Cable” chapter in the
Cisco ONS 15600 SDH Procedure Guide
. For more information about OSCM fiber
connections and terminations, refer to the
Cisco ONS 15454 DWDM Troubleshooting Guide
.
Caution
Always use the supplied electrostatic discharge wristband when working with a powered
ONS 15600 SDH. Plug the wristband cable into the ESD jack located lower-right edge of the shelf
assembly.
If the physical connections are correct and configured to carry DCC traffic, ensure that both ends of the
fiber span have unlocked ports. Verify that the ACT/SBY LED on each card is green.
Step 4
When the LEDs on the cards are correctly illuminated, complete the
“2.8.5 Verify or Create Node DCC
Terminations” procedure on page 2-139
to verify that the DCC is provisioned for the ports at both ends
of the fiber span.
Step 5
at the adjacent nodes.
Step 6
If DCC is provisioned for the ends of the span, verify that the port is active and in service by completing
the following steps:
a.
Confirm that the card shows a green LED in CTC or on the physical card.
A green ACT/SBY LED indicates an active card. An amber ACT/SBY LED indicates a standby card.
b.
To determine whether the port is in service, double-click the card in CTC to display the card view.
c.
For an STM-N card, click the
Provisioning > Line
tabs. For the OSCM card, click the
Provisioning > STM-1 Line
tabs.
d.
Verify that the
Admin State column
lists the port as
Locked
.
e.
If the
Admin State
column lists the port as Locked,maintenance or Locked,disabled, click the
column and click
Locked
from the drop-down list. Click
Apply
.
Note
If a port in the unlocked admin state does not receive a signal, the LOS alarm is raised and
the port service state transitions to Locked-disabled, automaticInService & failed.
Step 7
For all nodes, if the card is in service, use an optical test set to determine whether signal failures are
present on fiber terminations. For specific procedures to use the test set equipment, consult the
manufacturer.
Caution
Using an optical test set disrupts service on an STM-N card. It could be necessary to manually switch
traffic carrying circuits over to a protection path. Refer to the
“2.8.2 Protection Switching, Lock
Initiation, and Clearing” section on page 2-123
for commonly used switching procedures.
Step 8
If no signal failures exist on terminations, measure power levels to verify that the budget loss is within
the parameters of the receiver. See the
“1.9.3 Optical Traffic Card Transmit and Receive Levels” section
for non-DWDM card levels and refer to the
Cisco ONS 15454 DWDM Reference Manual
for DWDM card levels.
Summary of Contents for Cisco ONS 15600 SDH
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