Cisco ONS 15454 Troubleshooting Manual page 229

Chapter 2 Alarm Troubleshooting
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2.6 Safety Summary
This section covers safety considerations designed to ensure safe operation of the ONS 15454. Personnel
should not perform any procedures in this chapter unless they understand all safety precautions,
practices, and warnings for the system equipment. Some troubleshooting procedures require installation
or removal of cards; in these instances users should pay close attention to the following caution.
Hazardous voltage or energy could be present on the backplane when the system is operating. Use
Caution
caution when removing or installing cards.
Some troubleshooting procedures require installation or removal of OC-192 cards; in these instances
users should pay close attention to the following warnings.
On the OC-192 card, the laser is on when the card is booted and the safety key is in the on position
Warning
(labeled 1). The port does not have to be in service for the laser to be on. The laser is off when the
safety key is off (labeled 0). Statement 293
Warning Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard. Statement 1056
Use of controls, adjustments, or performing procedures other than those specified could result in
Warning
hazardous radiation exposure. Statement 1057
Class 1 laser product. Statement 1008
Warning
Do not reach into a vacant slot or chassis while you install or remove a module or a fan. Exposed
Warning
circuitry could constitute an energy hazard. Statement 206
The power supply circuitry for the equipment can constitute an energy hazard. Before you install or
Warning
replace the equipment, remove all jewelry (including rings, necklaces, and watches). Metal objects
can come into contact with exposed power supply wiring or circuitry inside the DSLAM equipment.
This could cause the metal objects to heat up and cause serious burns or weld the metal object to the
equipment. Statement 207
November 2009
A transient (T) event is one that is automatically raised and cleared in CTC during system changes
such as user login, logout, loss of connection to node view, etc. Transient events do not require user
action. These are listed in Chapter 3, "Transient Conditions."
Cisco ONS 15454 Troubleshooting Guide, R8.5
2.6 Safety Summary
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