DI-2621 Router
5)
Never assume that power is disconnected from a circiut.Always check.
6)
If an accident occurs ,proceed as folllows:
Turn OFF power to the system
Use caution
Determine if the victim needs rescue breathing or external cardiac compressions; then take appropriate action.
If possible ,send onather person to get medical aids.Otherwise ,assess the condition of the victim and then call for
help.
2.1.4 Preventing electrostatic discharge damage
Electrostatic discharge can damage equipment and impair electricall circiutry .It occurs when electronic
components are improperly handled and can result in complete or intermittent failures.
Always follow electrostatic discharge prevention procedures when removing and replacing components.Ensure
that the chassis is electrically connected to earth grouond .Wear an ESD-preventive wrist strap,ensuring that it
makes good skin contact .Conect the clip to an unpainted surface of the chassis frame to safely channel unwanted
ESD voltages to ground.To properly guard against ESD damage and shoaks,the wrist strap and cord must be used
effectively.If no wrist strap is available, ground yourself by touching the metal part of the chassis.
2.2 General site requirements
This section describes the requirements your site must meet for safe installation and operation of your
system .Ensure that your site is properly prepared before beginning installation.
2.2.1 Site environment
The router can be placed on a desktop or mounted in a rack.The location of the chassis and the layout of your
equipment rack or wiring room are extremely important for for proper system operation.Placing euipment too close
togather ,inadiquate ventilation,and inaccessible panels can make system maintinace or cause system
malfunctions and shutdown.
When planning your site layout and equipment loations, remamber the precautions described in the next
section ,"Preventive Site Configuration" .If you are experiencing shutdowns or unusually high errors with your
exsting equipment, this precautions might help you isolate the cause of failures and prevent future problemss.
2.2.2 Preventive site configuration
The following precautions will help you plan an acceptable operating environment for you router and help you
avoid environmentally-cauesd equipment failures:
(1)
Ensure that the room in which you operate your system has adequate air circulation .Electrical euqipment
generates heat .Ambient air temperature might not be able to cool equipment to acceptable opoerating
temperatures without adequate circiulation.
(2)
Always follow the EDS-prevention procedures to avoid damage to equipment .Damage from static
discharge can cause immediate or intermittent equipment failure.
(3)
The chaissis is designed to allow cooling air to flow effectively inside it .An open chassis allows allows air
leaks ,which might interrupt and redirect the flow of cooling air from internal components.
2.2.3 Configuring Equipment rack
The following information will help you plan an acceptable equipment rack configuration.
(1)
The equipment in the rack will heat when working.So enclosed racks must have adequate ventilation.The
equipment should not be put too close to each other to ensure the racks are not overheat.
(2)
When mounting a chassis in an open rack ensure that the rack frame does not lock the intake or or the
exhaust ports.So check the position of the chassis when it is seated all the way into the rack.
(3)
Ensure that you provide adequate ventilation for equipment at the bottom of rack.
(4)
Baffles can help to isolate exhaust air from intake air, which also helps to draw cooling air through the
chassis .The best placement of the chassis on the airflaw in the rack ,which and be found by experimenting
with different arrangement.
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