Verilink AS2000: The Basics (880-502981-001) Product Manual User Manual download pdf (Page 30)

System Information

2-14 Verilink Access System 2000: The Basics

NOTE:

Any ACP based AS2000 application module which uses a data

bus to pass data to another module must use shelf timing.

Table 2-7 ACP Timing Options

Timing Source

The timing source can be any port on the module, the internal

clock on the module, or an external clock source connected to the

external timing input DIN connector on the module’s rear

connector (CIM).

Shelf Sync Master

The shelf sync master is the ACP module responsible for putting

the shelf timing table onto the clock timing bus. The sync master

cannot be an NCM module. If the sync master is removed from the

shelf, any ACP modules relying on the shelf timing table will

momentarily have performance interruptions until a new sync

master is selected.

Timing Definition

Shelf

Timing

Some ACP module within the shelf provides the timing for all

modules set for shelf timing.

Card

Timing

The module uses its internal clock or synchronizes its internal

clock to the signal from the network, application equipment, or

external timing ports. Shelf settings are ignored.

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Verilink AS2000: The Basics (880-502981-001) Product Manual User Manual Page 30