Cisco 3526 Dokumentacja Pobierz pdf (Strona 43)

3-3

PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration

OL-3526-05

Chapter 3 Removing and Installing Port Adapters

Warnings and Cautions

The following is a functional description of OIR for background information only; for specific

procedures for installing and replacing a module in a supported platform, refer to the “Port Adapter

Removal and Installation” section on page 3-4.

Each module has a bus connector that connects it to the router. The connector has a set of tiered pins in

three lengths that send specific signals to the system as they make contact with the module. The system

assesses the signals it receives and the order in which it receives them to determine if a module is being

removed from or introduced to the system. From these signals, the system determines whether to

reinitialize a new interface or to shut down a disconnected interface.

Specifically, when you insert a module, the longest pins make contact with the module first, and the

shortest pins make contact last. The system recognizes the signals and the sequence in which it receives

them.

When you remove or insert a module, the pins send signals to notify the system of changes. The router

then performs the following procedure:

1. Rapidly scans the system for configuration changes.

2. Initializes newly inserted port adapters or administratively shuts down any vacant interfaces.

3. Brings all previously configured interfaces on the module back to their previously installed state.

Any newly inserted interface is put in the administratively shutdown state, as if it was present (but

not configured) at boot time. If a similar module type is reinserted into a slot, its ports are configured

and brought online up to the port count of the originally installed module of that type.

Note Before you begin installation, read Chapter 2, “Preparing for Installation,” for a list of parts and tools

required for installation.

Warnings and Cautions

Observe the following warnings and cautions when installing or removing port adapters.

Note If a port adapter lever or other retaining mechanism does not move to the locked position, the port

adapter is not completely seated in the midplane. Carefully pull the port adapter halfway out of the slot,

reinsert it, and move the port adapter lever or other mechanism to the locked position.

Caution To prevent jamming the carrier between the upper and the lower edges of the port adapter slot, and to

ensure that the edge connector at the rear of the port adapter mates with the connection at the rear of the

port adapter slot, make certain that the carrier is positioned correctly, as shown in the cutaway in the

following illustrations.

Caution When performing the following procedures, wear a grounding wrist strap to avoid ESD damage to the

card. Some platforms have an ESD connector for attaching the wrist strap.

Warning

Hazardous voltage or energy is present on the backplane when the system is operating. Use caution

when servicing.

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