Cisco 2524 - Router - EN Instruction sheet

CHAPTER
Preparing to Install the Cisco 2524 and Cisco 2525 Routers 2-1
Preparing to Install the
Cisco 2524 and Cisco 2525
Routers
2
This chapter describes the tasks you must perform before you begin to install the
Cisco 2524 and Cisco 2525 routers, and includes the following sections:
•Safety Recommendations
•General Site Requirements
•Installation Checklist
•Creating a Site Log
•Preparing to Connect to a Network
•Inspecting the System
Safety Recommendations
Follow these guidelines to ensure general safety:
•Keep the chassis area clear and dust-free during and after installation.
•Put the removed chassis cover in a safe place.
•Keep tools away from walk areas where you and others could fall over them.
•Do not wear loose clothing that could get caught in the chassis. Fasten your tie or scarf
and roll up your sleeves.
•Wear safety glasses if you are working under any conditions that might be hazardous to
your eyes.
•Do not perform any action that creates a potential hazard to people or makes the
equipment unsafe.

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Safety Recommendations
Warning Ultimate disposal of this product should be handled according to all national
laws and regulations. (To see translated versions of this warning, refer to the appendix
“Translated Safety Warnings.”)
Maintaining Safety with Electricity
Follow these guidelines when working on equipment powered by electricity.
Warning Before working on equipment that is connected to power lines, remove jewelry
(including rings, necklaces, and watches). Metal objects will heat up when connected to
power and ground and can cause serious burns or can weld the metal object to the terminals.
(To see translated versions of this warning, refer to the appendix “Translated Safety
Warnings.”)
•Locate the emergency power-off switch for the room in which you are working. Then,
if an electrical accident occurs, you can act quickly to turn off the power.
•Disconnect all power by turning off the power and unplugging the power cord before
doing the following:
—Installing or removing a chassis
—Working near power supplies
Warning When installing the unit, the ground connection must always be made first and
disconnected last. (To see translated versions of this warning, refer to the appendix
“Translated Safety Warnings.”)
•Do not work alone if potentially hazardous conditions exist.
•Never assume that power is disconnected from a circuit. Always check.

Preparing to Install the Cisco 2524 and Cisco 2525 Routers 2-3
Safety Recommendations
Warning Read the installation instructions before you connect the system to its power
source. (To see translated versions of this warning, refer to the appendix “Translated Safety
Warnings.”)
•Look carefully for possible hazards in your work area, such as moist floors, ungrounded
power extension cables, frayed power cords, and missing safety grounds.
•If an electrical accident occurs, proceed as follows:
—Use caution; do not become a victim yourself.
—Turn off power to the system.
—If possible, send another person to get medical aid. Otherwise, assess the condition
of the victim and then call for help.
—Determine if the person needs rescue breathing or external cardiac compressions;
then take appropriate action.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD
damage occurs when electronic components are improperly handled and can result in
complete or intermittent failures.
Always follow ESD-prevention procedures when removing and replacing components.
Ensure that the chassis is electrically connected to earth ground. Wear an ESD-preventive
wrist strap, ensuring that it makes good skin contact. Connect the grounding clip to an
unpainted surface of the chassis frame to safely ground unwanted ESD voltages. To
properly guard against ESD damage and shocks, the wrist strap and cord must operate
effectively. If no wrist strap is available, ground yourself by touching the metal part of the
chassis.
Caution For safety, periodically check the resistance value of the antistatic strap, which
should be between 1 and 10 megohms (Mohms).

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General Site Requirements
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.
Site Environment
The routers can be placed on a desktop or mounted in a rack or on a wall. The location of
the routers and the layout of your equipment rack or wiring room are extremely important
for proper system operation. Equipment placed too close together, inadequate ventilation,
and inaccessible panels can cause system malfunctions and shutdowns, and can make router
maintenance difficult.
When planning your site layout and equipment locations, keep in mind the precautions
described in the next section, “Preventive Site Configuration,” to help avoid equipment
failures and reduce the possibility of environmentally caused shutdowns. If you are
currently experiencing shutdowns or unusually high errors with your existing equipment,
these precautions may help you isolate the cause of failures and prevent future problems.
Preventive Site Configuration
The following precautions will help you plan an acceptable operating environment for your
router and will help you avoid environmentally caused equipment failures:
•Electrical equipment generates heat. Ambient air temperature might not be adequate to
cool equipment to acceptable operating temperatures without adequate circulation.
Ensure that the room in which you operate your system has adequate air circulation.
•Always follow the ESD-prevention procedures described in the section “Safety
Recommendations” earlier in this chapter to avoid damage to equipment. Damage from
static discharge can cause immediate or intermittent equipment failure.
•Ensure that the chassis cover is secure. The chassis is designed to allow cooling air to
flow effectively within it. An open chassis allows air leaks, which may interrupt and
redirect the flow of cooling air from internal components.

Preparing to Install the Cisco 2524 and Cisco 2525 Routers 2-5
General Site Requirements
Configuring Equipment Racks
The following tips will help you plan an acceptable equipment rack configuration:
•Enclosed racks must have adequate ventilation. Ensure that the rack is not overly
congested because each unit generates heat. An enclosed rack should have louvered
sides and a fan to provide cooling air.
•When mounting a chassis in an open rack, ensure that the rack frame does not block the
intake or exhaust ports. If the chassis is installed on slides, check the position of the
chassis when it is seated all the way into the rack.
•In an enclosed rack with a ventilation fan in the top, excessive heat generated by
equipment near the bottom of the rack can be drawn upward and into the intake ports of
the equipment above it in the rack. Ensure that you provide adequate ventilation for
equipment at the bottom of the rack.
•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 baffles depends on the airflow patterns
in the rack, which are found by experimenting with different arrangements.
Power Supply Considerations
Check the power at your site to ensure that you are receiving “clean” power (free of spikes
and noise). Install a power conditioner if necessary.
Warning The device is designed to work with TN power systems. (To see translated
versions of this warning, refer to the appendix “Translated Safety Warnings.”)

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Installation Checklist
The router’s AC power supply includes the following features:
•Autoselects either 110V or 220V operation.
•All units include a 6-foot (1.8-meter) electrical power cord. (A label near the power cord
indicates the correct voltage, frequency, current draw, and power dissipation for the
unit.)
Warning This product relies on the building’s installation for short-circuit (overcurrent)
protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S.
(240 VAC, 10A international) is used on the phase conductors (all current-carrying
conductors). (To see translated versions of this warning, refer to the appendix “Translated
Safety Warnings.”)
The Cisco 2524 offers a direct current (DC) power supply. See the section “DC Power
Specifications” in the chapter “Installing the Cisco 2524 and Cisco 2525 Routers” for more
information.
Installation Checklist
The Installation Checklist lists the procedures for initial hardware installation of a new
router. Make a copy of this checklist and mark the entries as you complete each procedure.
Include a copy of the checklist for each system in your Site Log. (See the next section,
“Creating a Site Log.”)

Preparing to Install the Cisco 2524 and Cisco 2525 Routers 2-7
Installation Checklist
Installation checklist for site______________________________________________
Router name__________________________________________________________
Task Verified by Date
Installation checklist copied
Background information placed in Site Log
Site power voltages verified
Required tools available
Additional equipment available
Router received
Optional UniverCD or printed documentation
received
Chassis components verified
Initial electrical connections established
ASCII terminal or PC attached to console port
Signal distance limits verified
Startup sequence steps completed
Initial system operation verified
Software image verified

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Creating a Site Log
Creating a Site Log
The Site Log provides a record of all actions relevant to the router. Keep it near the chassis
where anyone who installs or maintains the router has access to it. Use the Installation
Checklist (see the previous section, “Installation Checklist”) to verify steps in the
installation and maintenance of your router. Site Log entries might include the following:
•Installation progress—Make a copy of the Installation Checklist and insert it into the
Site Log. Make entries on the checklist as you complete each procedure.
•Upgrade and maintenance procedures—Use the Site Log as a record of ongoing system
maintenance and expansion. Each time a procedure is performed on the router, update
the Site Log to reflect the following:
—Configuration changes
—Changes and updates to Cisco IOS software
—Maintenance schedules and requirements
—Corrective maintenance procedures performed
—Intermittent problems
—Related comments and notes
Preparing to Connect to a Network
When setting up your router, consider distance limitations and potential electromagnetic
interference (EMI) as defined by the EIA.
Warning The Ethernet 10BaseT, Token Ring, serial, console, and auxiliary ports contain
safety extra-low voltage (SELV) circuits. BRI circuits are treated like telephone-network
voltage (TNV) circuits. Avoid connecting SELV circuits to TNV circuits. (To see translated
versions of this warning, refer to the appendix “Translated Safety Warnings.”)

Preparing to Install the Cisco 2524 and Cisco 2525 Routers 2-9
Preparing to Connect to a Network
2-Wire Switched 56-kbps DSU/CSU WAN Module
The 2-wire switched 56-kbps DSU/CSU WAN module includes an RJ-11 port for
connection to a WAN. Cables are not included with the modules; however, port pinouts are
listed in the section “Fractional T1/T1 DSU/CSU Module Port Pinouts” in the appendix
“Cabling Specifications for the Cisco 2524 and Cisco 2525 Routers.”
Warning Network hazardous voltages are present in the BRI, fractional T1/T1, and
switched 56 cables. If you detach the cable, detach the end away from the router first to
avoid possible electric shock. Network hazardous voltages are also present in the area of
the BRI (RJ-45), fractional T1/T1 (RJ-48C), and switched 56 (RJ-11 or RJ-48S) ports,
regardless of whether power is OFF or ON. (To see translated versions of this warning, refer
to the appendix “Translated Safety Warnings.”)
Warning This card is intended to be installed in UL- and CSA-certified equipment in the
field by the user in the manufacturer’s defined operator access area. Check the equipment
manufacturer to verify/confirm that your equipment is suitable for user-installed
application cards. (To see translated versions of this warning, refer to the appendix
“Translated Safety Warnings.”)
Table 2-2 lists network specifications to consider before connecting the module to a
network.
Table 2-1 2-Wire Switched 56-kbps DSU/CSU WAN Module Network
Specifications
Description Specification
Loop rates 56 kbps
Data rates 56 kbps
Line requirements Northern Telecom Datapath
Technology, Bellcore TR-EOP-000277
Receiver sensitivity –42 dB at 80 kHz1
1. kHz = kilohertz.

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Preparing to Connect to a Network
4-Wire 56/64-kbps DSU/CSU WAN Module
The 4-wire 56/64-kbps DSU/CSU WAN module includes an RJ-48S port for connection to
a WAN. Cables are not included with the module; however, port pinouts are listed in the
section “4-Wire 56/64-kbps DSU/CSU Module Port Pinouts” in the appendix “Cabling
Specifications for the Cisco 2524 and Cisco 2525 Routers.
Warning Network hazardous voltages are present in the BRI, fractional T1/T1, and
switched 56 cables. If you detach the cable, detach the end away from the router first to
avoid possible electric shock. Network hazardous voltages are also present in the area of
the BRI (RJ-45), fractional T1/T1 (RJ-48C), and switched 56 (RJ-11 or RJ-48S) ports,
regardless of whether power is OFF or ON. (To see translated versions of this warning, refer
to the appendix “Translated Safety Warnings.”)
Warning This card is intended to be installed in UL- and CSA-certified equipment in the
field by the user in the manufacturer’s defined operator access area. Check the equipment
manufacturer to verify/confirm that your equipment is suitable for user-installed
application cards. (To see translated versions of this warning, refer to the appendix
“Translated Safety Warnings.”)
Table 2-2 lists network specifications to consider before connecting the module to a
network.