Cisco ONS 15454 SDH Especificaciones descargar pdf (Pagina 29)

Cisco ONS 15454 SDH Product Overview, R3.4

September 2002

Cisco ONS 15454 SDH Product Overview

In-Service Span Upgrades

Service States

ONS 15454 SDH cards, ports, and circuits can be placed in any of the following

service states:

• In Service (IS)—The card, port, or circuit is fully available for operation

(working or protect).

• Out of Service (OOS)—The card, port, or circuit is not available for

operation.

• Out of Service for Maintenance (OOS-MT)—The port or circuit has been

temporarily taken out of service for maintenance. Alarms are not reported

autonomously, but they can be retrieved. This state is not available for cards.

• Out of Service—Auto In Service (OOS-AINS)—The card, port, or circuit is

currently out of service, but will automatically be placed in service when a

valid card is plugged into the preprovisioned slot and fully initialized.

Use the CTC Provisioning >Line tabs or the CTC Maintenance > Line tabs to

transition ports from state to state. The user can also transition the port into

different states from the State tab in the Edit Circuit window.

In-Service Span Upgrades

A span is the optical-fiber connection between two ONS 15454 SDH nodes. In a

span upgrade, the transmission rate of a span is upgraded from a lower to a higher

STM-N signal. All other span configuration attributes remain unchanged. With

multiple nodes, a span upgrade is a coordinated series of upgrades on all nodes in

the ring or protection group. You can perform in-service span upgrades for the

following ONS 15454 SDH cards:

• STM-4 to STM-16

• STM-4 to STM-64

• STM-16 to STM-64

To perform a span upgrade, the higher-rate optical card must replace the

lower-rate card in the same slot. The protection configuration of the original

lower-rate optical card (two-fiber MS-SPRing, four-fiber MS-SPRing, SNCP, or

1+1) is retained by the higher-rate optical card. The Span Upgrade Wizard

automates the span upgrade procedure for all protection configurations.

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Cisco ONS 15454 SDH Especificaciones Pagina 29