Cisco Cisco ONS 15454 SDH Multiservice Provisioning Platform (MSPP) Guía De Instalación
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Installing ONS 15454 SDH E1-N-14 Cards
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Removal Procedures
Removal Procedures
Use this section if you are installing or removing the E1-N-14 card for the first time. After you become
familiar with ONS 15454 SDH card installation and boot up, use this section as a reference.
familiar with ONS 15454 SDH card installation and boot up, use this section as a reference.
Caution
Always use the supplied electrostatic discharge (ESD) wristband when working with an ONS 15454
SDH. Plug the wristband cable into the ESD jack located on the lower right outside edge of the shelf
assembly and ensure the shelf assembly is properly grounded.
SDH. Plug the wristband cable into the ESD jack located on the lower right outside edge of the shelf
assembly and ensure the shelf assembly is properly grounded.
Caution
Hazardous voltage or energy may be present on the backplane when the system is operating. Use caution
when servicing.
when servicing.
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 electrical card to standby mode before you pull the
card from the node.
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 electrical card to standby mode before you pull the
card from the node.
Reset an Electrical Card (E1-N-14, DS3iN-12, or E3-12)
Note
An electrical card reset can cause a linear 1:1 or 1:N protection switch or an MSSPRing protection
switch.
switch.
The cards should be replaced when the red FAIL LED appears.
Take these precautions before performing an electical card reset to avoid causing a linear 1:1, 1:N or
MSSPRing protection switch:
MSSPRing protection switch:
Step 1
Ensure that the working span is active on the local and remote nodes.
Step 2
Ensure that the working span is carrying error-free traffic without SF alarms.
Step 3
Place a lockout on the protection span before initiating an electrical card reset. In an MSSPRing, place
a lockout on the East and West cards of the nodes adjacent to the electrical card switch node; for
example, to switch the electrical card on Node B, place the lockout on the West card of Node A and on
the East card of Node C. No lockout is necessary on Node B. Before the lockout is set, verify that the
MSSPRing is not switched. Traffic can be lost if a lockout is set when the MSSPRing is switched, .
a lockout on the East and West cards of the nodes adjacent to the electrical card switch node; for
example, to switch the electrical card on Node B, place the lockout on the West card of Node A and on
the East card of Node C. No lockout is necessary on Node B. Before the lockout is set, verify that the
MSSPRing is not switched. Traffic can be lost if a lockout is set when the MSSPRing is switched, .
<------East [Node A] West------East [Node B] West------East [Node C] West------>
In a 1:1 protection scheme, place a lockout on the protect card and verify that traffic is traveling over
the working span before setting the lockout.
the working span before setting the lockout.