Verilink AS2000: The Basics (880-502981-001) Product Manual Manual de usuario descargar pdf (Pagina 20)

System Information

2-4 Verilink Access System 2000: The Basics

ACP Controller

Bus Structure

The ACP can operate on either Data Bus A or C. The MLS 2200

provides up to five islands using bus segments A1-A5, or full shelf

control using bus C. Additionally, you can set up one or two self-

controlled islands on the MLS 2200 A bus, and have the remaining

segments under common control using the C bus. Refer to Figure

2-3.

The MLS 2000, QLS 2500, and DLS 2100 can use Bus A or C to

control all the ACP-based modules in the shelf. The ACP controller

bus can be expanded to other shelves with a daisy-chain cable

between the primary and expansion management ports.

Figure 2-3 MLS 2200 Controller Bus Usage

Shelf and Node

Masters

In an ACP-based node, a shelf master uses the ACP controller bus to

poll the other modules in the shelf for configuration and

performance status information. A redundant NCM in the same

shelf becomes the shelf master if the current shelf master fails. If

there is no redundant NCM in the shelf, an ACP application module

in the shelf becomes the shelf master if the NCM fails.

In a multi-shelf node, when the shelf master is polled by the node

master, it transfers the information from its shelf modules to the

node master. If the node master fails, the shelf master with the

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Verilink AS2000: The Basics (880-502981-001) Product Manual Manual de usuario Pagina 20