Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
Optical Card Protection
used for working and protect modules; the protection of the card is defined by the slot where it is
housed). Each slot maps to a set of 12 or 14 SMB connectors on the EIA depending on the number of
ports on the corresponding card. Any slot can be used without protection for unprotected DS-1, DS-3,
or EC-1 access.
The DS1N-14 card can be a working or protect card in 1:1 or 1:N protection schemes. When used with
1:N protection, the DS1N-14 card can protect up to five DS1-14 plug-ins using the SMB connectors with
the DS-1 electrical interface adapters (baluns).
4.3.4 AMP Champ Protection
When you use AMP Champ connectors, the ONS 15454 supports 1:1 or 1:N protection for the DS-1
cards. The DS1N-14 card can be a working or protect card in 1:1 or 1:N protection schemes. When used
with 1:N protection, the DS1N-14 card can protect up to five DS1-14 plug-ins using the AMP Champ
EIA.
4.4 Optical Card Protection
With 1+1 port-to-port protection, any number of ports on the protect card can be assigned to protect the
corresponding ports on the working card. The working and protect cards do not have to be placed side
by side in the node. A working card must be paired with a protect card of the same type, for example, an
OC-3 card should be paired with another OC-3 card. The protection takes place on the port level, any
number of ports on the protect card can be assigned to protect the corresponding ports on the working
card.
For example, on a four-port card, you can assign one port as a protection port on the protect card
(protecting the corresponding port on the working card) and leave three ports unprotected. Conversely,
you can assign three ports as protection ports and leave one port unprotected.
Note Currently, the OC-3 card is the only multiple port optical card. You cannot make protection groups
on the same multiport card.
With 1:1 or 1:N protection (electrical cards), the protect card must protect an entire slot. In other words,
all the ports on the protect card will be used in the protection scheme.
1+1 span protection can be either revertive or non-revertive. With non-revertive 1+1 protection, when a
failure occurs and the signal switches from the working card to the protect card, the signal stays switched
to the protect card until it is manually switched back. Revertive 1+1 protection automatically switches
the signal back to the working card when the working card comes back online.
You create and modify protection schemes using CTC software. For more information, see the Cisco
ONS 15454 Installation and Operations Guide.