Cisco 4000 Series Посібник із заміни - Сторінка 2

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Warning

AC units; disconnect the power at the circuit breaker on DC units.

Note

Safety Warnings" in the Cisco 4000 Series Installation Guide.

Caution

body before opening the chassis. Before performing procedures described in this document, review

the sections "Safety Recommendations," "Safety with Electricity," and "Tools and Equipment

Required."

Note

network processor modules are installed in a Cisco 4000 series router.

Warning

card when no cable is connected. Avoid exposure and do not stare into open apertures. Following is

an example of the warning label that appears on the product:

Warning

safety extra-low voltage (SELV) circuits. SELV circuits should only be connected to other SELV

circuits. Because the BRI circuits are treated like telephone-network voltage, avoid connecting the

SELV circuit to the telephone network voltage (TNV) circuits.

Warning

Do not attempt to tamper with or open any public telephone operator (PTO)-provided equipment or

connection hardware. Any hardwired connection (other than by nonremovable,

connect-one-time-only lug) must be made only by PTO staff or suitably trained engineers.

2 Replacing the Cisco 4000 Series Power Supply

Troubleshooting the Power Supply Installation

Cisco Connection Online

Before working on a chassis or working near power supplies, unplug the power cord on

Translations for all safety warnings included in this document are in the appendix "Translated

To avoid damaging ESD-sensitive components, discharge all static electricity from your

The following warnings are applicable if single-mode FDDI, single-mode OC3 ATM, or BRI

Invisible laser radiation may be emitted from the aperture ports of the single-mode FDDI

AVOID EXPOSURE–Invisible Laser rad-

iation is emitted from transmit ports.

The ports labeled "Ethernet," "10BaseT," "Token Ring," "Console," and "AUX" are

The ISDN connection is a source of voltage that should be inaccessible to user contact.

WARNING

1300NM

CLASS 1 LASER PRODUCT