Cisco WS-X4604-GWY - VoIP Gateway Spezifikationen PDF herunterladen (Seite 28)

2-2

Cisco Catalyst 4000 Access Gateway Module Installation and Configuration Note

OL-3008-01

Chapter 2 Installing the Access Gateway Module

Removing Catalyst 4000 Switching Modules (optional)

Caution Before you handle switching modules, read the “Preventing Electrostatic Discharge Damage” section

on page 2-2.

You also need an appropriate connecting cable to install and connect your interface module(s). The cable

type required for each module is described in the section for that module.

These items are optional:

• Synchronous modem, DSU/CSU, or other DCE—Used to connect the WIC-2 A/S to a digital WAN

line.

• External NT1 ISDN BRI S/T leased-line modules only—Used to connect the VIC-2BRI-S/T-TE to

an ISDN interface.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are

improperly handled, results in complete or intermittent failures. Port adapters and processor modules

comprise printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI)

shielding and connectors are integral components of the carrier. Although the metal carrier helps to

protect the board from ESD, use a preventive antistatic strap during handling.

Following are guidelines for preventing ESD damage:

• Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.

• Connect the equipment end of the strap to an unfinished chassis surface.

• When installing a component, use any available ejector levers or captive installation screws to

properly seat the bus connectors in the backplane or midplane. These devices prevent accidental

removal, provide proper grounding for the system, and help to ensure that bus connectors are

properly seated.

• When removing a component, use any available ejector levers or captive installation screws to

release the bus connectors from the backplane or midplane.

• Handle carriers by available handles or edges only; avoid touching the printed circuit boards or

connectors.

• Place a removed board component-side-up on an antistatic surface or in a static shielding container.

If you plan to return the component to the factory, immediately place it in a static shielding

container.

• Avoid contact between the printed circuit boards and clothing. The wrist strap only protects

components from ESD voltages on the body; ESD voltages on clothing can still cause damage.

Caution Never attempt to remove the printed circuit board from the metal carrier.

Removing Catalyst 4000 Switching Modules (optional)

Caution To prevent ESD damage, handle switching modules by the carrier edges only. Whenever you handle

switching modules, you should use a wrist strap or other grounding device.

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