Cisco ONS 15454 SDH Specifications Page 210

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4-12
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 4 Maintenance
Card Replacement
again, will take about 15 to 20 minutes. Copying the database from the active TCC-I will take about
3 minutes. So, depending on the software existing in the new TCC-I, booting it up will take between
3 and about 40 minutes.
Procedure: Reset an STM-N Card
Note An STM-N reset can cause a linear 1+1 STM-N protection switch or an MS-SPRing protection
switch.
Note Traffic can be interrupted if you pull an active card from the ONS 15454 SDH. Use caution when
replacing cards and verify that only inactive or standby cards are being replaced. If an active card
needs to be replaced, follow the procedure to switch the STM-N card to standby mode before you
pull the card from the node.
Warning
Class I (21 CFR 1040.10 and 1040.11) and Class 1M (IEC 60825-1 2001-01) laser products.
Warning
Invisible laser radiation may be emitted from the end of the unterminated fiber cable or connector.
Do not stare into the beam or view directly with optical instruments. Viewing the laser output with
certain optical instruments (for example, eye loupes, magnifiers, and microscopes) within a
distance of 100 mm may pose an eye hazard. Use of controls or adjustments or performance of
procedures other than those specified may result in hazardous radiation exposure.
The STM-N card should be replaced if a red FAIL LED appears.
Take these precautions before initiating an STM-N card reset to avoid causing a linear 1+1 or
MS-SPRing protection switch:
Step 1 Ensure that the working (active) span is active on the local and remote nodes.
Step 2 Ensure that the working (active) span is carrying error-free traffic without FAIL alarms or SF alarms.
Step 3 Perform a lockout on the protection span in the CTC software before initiating an STM-N card reset. In
an MS-SPRing, place a lockout on the East and West node cards adjacent to the XC10-G switch node.
For example, if you are switching the XC10-G on Node B, place a lockout on the Node A West card and
on the Node C East card. You do not need to place lockouts on Node B. Before settingthe lockout, verify
that the MS-SPRing is not switched. Traffic can be lost if the MS-SPRing is switched when the lockout
is set.
<------East [Node A] West------East [Node B] West------East [Node C] West------>
Purpose Resetting an STM-N card
Tools/Equipment
Prerequisite procedures
Required/As Needed As needed
On Site/Remote On Site
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