Cisco ONS 15454 DWDM - Managing APC

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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
August 2005
Chapter 18 Network Reference
18.4.3 Managing APC
• A HW FAIL alarm is raised by any card in any of the network nodes.
• A Mismatch Equipment Alarm (MEA) is raised by any card in any of the network nodes.
• An Improper Removal alarm is raised by any card in any of the network nodes.
• Gain Degrade, Power Degrade, and Power Fail Alarms are raised by the output port of any amplifier
card in any of the network nodes.
• A VOA degrade or fail alarm is raised by any of the cards in any of the network nodes.
The APC state (Enable/Disable) is located on every node and can be retrieved by the CTC or TL1
interfaces. If an event that disables APC occurs in one of the network nodes, APC is disabled on all the
others and the APC state changes to DISABLE - INTERNAL. The disabled state is raised only by the
node where the problem occurred to simplify troubleshooting.
APC raises the following standing conditions at the port level in CTC, TL1, and SNMP:
• APC Out of Range—APC cannot assign a new setpoint for a parameter this is allocated to a port
because the new setpoint exceeds the parameter range.
• APC Correction Skipped—APC skipped a correction to one parameter allocated to a port because
the difference between the expected and current values exceeds the +/– 3 dB security range.
After the error condition is cleared, signaling protocol enables APC on the network and the APC
DISABLE - INTERNAL condition is cleared. Because APC is required after channel provisioning to
compensate for ASE effects, all optical channel network connection (OCHNC) circuits that you
provision during the disabled APC state are kept in the Out-of-Service and Autonomous, Automatic
In-Service (OOS-AU,AINS [ANSI]) or Unlocked-disabled,automaticInService (ETSI) service state
until APC is enabled. OCHNCs automatically go into the In-Service and Normal (IS-NR [ANSI]) or
Unlocked-enabled (ETSI) service state only after APC is enabled.
18.4.3 Managing APC
The automatic power control status is indicated by four APC states shown in the node view status area:
• Enable—APC is enabled.
• Disable - Internal—APC has been automatically disabled for an internal cause.
• Disable - User—APC was disabled manually by a user.
• Not Applicable—The node is provisioned to Metro Access or Not DWDM, which do not support
APC.
You can view the automatic power control information and disable and enable APC manually on the
Maintenance > DWDM > APC subtab (Figure 18-8).
Caution When APC is disabled, aging compensation is not applied and circuits cannot be activated. Do not
disable APC unless it is required for specific maintenance or troubleshooting tasks. Always enable APC
as soon as the tasks are completed.