Cisco 2811 Series Instalacja i aktualizacja - Strona 3

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Cisco 2811 Series Instalacja i aktualizacja

Make sure that the router is turned off and disconnected from its power source.

Step 1

Before opening the unit, disconnect the telephone-network cables to avoid contact with

Warning

telephone-network voltages. Statement 1041

If rack-mounting brackets are attached to the chassis, remove them, using a Phillips screwdriver.

Step 2

Remove the four screws at the back of the top cover, using a Phillips screwdriver.

Step 3

Perform the following steps to loosen the cover from the chassis:

Step 4

Insert the blade of the 1/4-inch screwdriver straight into the square hole on either side of the chassis

near the back, so that it fits against the chassis and does not go past the chassis and into the narrow

slot. See

Make sure that the tip of the screwdriver does not slide into the narrow vertical slot that is visible inside

Caution

the square hole. The tip of the screwdriver should rest on the metal tab just inside the chassis cover and

to the right of the vertical slot.

Figure 1

With the screwdriver positioned as required in

toward the back of the chassis to loosen one side of the cover. See

The friction fit may be fairly tight; however, if the cover does not move with moderate effort, make sure

Caution

that the screwdriver is not inserted into the narrow vertical slot.

Figure 2

Repeat

78-17850-01

Figure

Inserting the Screwdriver into the Side of the Chassis

Screwdriver must not

enter the vertical slot

Rotating the Screwdriver to Loosen the Chassis Cover

Step a.

and

Step b.

for the opposite side of the chassis.

Step a.

above, rotate the screwdriver a quarter turn

Installing and Upgrading Fans in Cisco 2811 Series Routers

Removing the Chassis Cover

Figure