Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Especificaciones descargar pdf (Pagina 17)

Cisco ONS 15454 Product Overview, R3.3

May 2002

Cisco ONS 15454 Product Overview

Cisco Transport Controller

Optical Protection

The ONS 15454 supports 1+1 protection to create redundancy for optical cards

and spans. With 1+1 protection, one optical port can protect another optical port;

therefore, in any two high-speed slots a single working card and a single dedicated

protect card of the same type (for example, two OC-48 cards) can be paired for

protection. If the working port fails, the protect port takes over. 1+1 span

protection can be either revertive or non-revertive.

Because the OC-3 card is a multiport card, port-to-port protection is available.

The ports on the protect card support the corresponding ports on the working card.

Protection Switching

The ONS 15454 supports revertive and non-revertive, unidirectional or

bidirectional switching for optical signals. 1:N electrical protection is always

revertive and bidirectional; 1:1 electrical protection is also bidirectional but

provides the revertive or non-revertive option.

When a failure occurs and automatic protection switching (APS) switches the

signal from the working card to the protect card, non-revertive switching does not

revert the traffic to the working card automatically when the working card reverts

to active status. When a failure is cleared, revertive switching automatically

switches the signal back to the working card after the provisionable revertive time

period has elapsed.

When a failure occurs to a signal that is provisioned as bidirectional, both the

transmit and receive signals are switched away from the point of failure (the port

or card). A unidirectional signal switches only the failure direction, either

transmit or receive.

Cisco Transport Controller

Cisco Transport Controller (CTC) is a software program that is automatically

downloaded from the TCC+ card to your workstation when you connect to the

ONS 15454. CTC gives you control of Operation, Administration, Maintenance,

and Provisioning (OAM&P) activities for the ONS 15454.

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Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Especificaciones Pagina 17