Cisco ASR 903 User manual

Installing the Cisco ASR 903 Router as a Satellite
Shelf
The chapter describes how to install the Cisco ASR 903 Router as a satellite shelf, and how to connect it to
networks and external devices.
•Safety Guidelines, page 1
•Site Planning, page 9
•Receiving the Cisco ASR 903 Router, page 19
•Installing the Router in a Rack, page 23
•Installing the Chassis Ground Connection, page 28
•Installing the Chassis Ground, page 30
•Installing the Fan Tray, page 31
•Installing and Removing an RSP Module, page 34
•Installing and Removing an Interface Module, page 37
•Installing the Power Supply, page 39
•Connecting the Cisco ASR 903 Router to the Network, page 52
Safety Guidelines
Before you begin the installation of the Cisco ASR 903 Router as a satellite shelf, review the safety guidelines
in this chapter to avoid injuring yourself or damaging the equipment.
In addition, before replacing, configuring, or maintaining the Cisco ASR 903 Router as a satellite shelf, review
the safety warnings listed in Regulatory Compliance and Safety Information for the Cisco ASR 903 Router
.
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Standard Warning Statements
To see translations of the warnings that appear in this publication, see the Regulatory Compliance and Safety
Information document that accompanied this device.
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions
to ensure that the system remains stable. The following guidelines are provided to ensure your safety:This
unit should be mounted at the bottom of the rack if it is the only unit in the rack.When mounting this unit
in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom
of the rack.When mounting this unit in a partially filled rack, load the rack from the bottom to the top with
the heaviest component at the bottom of the rack.If the rack is provided with stabilizing devices, install
the stabilizers before mounting or servicing the unit in the rack. Statement 1006
Warning
This unit is intended for installation in restricted access areas. A restricted access area can be accessed
only through the use of a special tool, lock and key, or other means of security. Statement 1017
Warning
Ultimate disposal of this product should be handled according to all national laws and regulations. Statement
1040
Warning
To prevent the system from overheating, do not operate it in an area that exceeds the maximum
recommended ambient temperature of 149°F (65°C). Statement 1047
Warning
The chassis should be mounted on a rack that is permanently affixed to the building. Statement 1049Warning
IMPORTANT SAFETY INSTRUCTIONS: This warning symbol means danger. You are in a situation
that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with
electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement
number provided at the end of each warning to locate its translation in the translated safety warnings that
accompanied this device. Statement 1071
Warning
This is a Class A Device and is registered for EMC requirements for industrial use. The seller or buyer
should be aware of this. If this type was sold or purchased by mistake, it should be replaced with a
residential-use type. Statement 294
Warning
This is a class A product. In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures. Statement 340
Warning
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Standard Warning Statements

This equipment is in compliance with the essential requirements and other relevant provisions of Directive
1999/5/EC. Statement 287.
Warning
Safety Guidelines for Personal Safety and Equipment Protection
The following guidelines help ensure your safety and protect the equipment. This list does not include all the
potentially hazardous situations. Therefore, you should be on alert.
•Before moving the system, always disconnect all the power cords and interface cables.
•Never assume that power is disconnected from a circuit; always check.
•Before and after installation, keep the chassis area clear and dust-free.
•Keep tools and assembly components away from walk areas where you or others could trip over them.
•Do not work alone if potentially hazardous conditions exist.
•Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
•Do not wear loose clothing that may get caught in the chassis.
•When working under conditions that may be hazardous to your eyes, wear safety glasses.
Safety Precautions for Module Installation and Removal
Be sure to observe the following safety precautions when you work on the router.
To see translations of the warnings that appear in this publication, see the Regulatory Compliance and Safety
Information document that accompanied this device.
Class 1 laser product. Statement 1008Warning
Do not stare into the beam or view it directly with optical instruments. Statement 1011Warning
Invisible laser radiation present. Statement 1016Warning
Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF or
ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, detach
the end away from the unit first. Statement 1026
Warning
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Safety Guidelines for Personal Safety and Equipment Protection

Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous
voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt
other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system
unless all cards, faceplates, front covers, and rear covers are in place. Statement 1029
Warning
Hazardous voltage or energy is present on the backplane when the system is operating. Use caution when
servicing. Statement 1034
Warning
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams
or view directly with optical instruments. Statement 1051
Warning
Safety with Electricity
Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect
the power at the circuit breaker on DC units. Statement 12
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 weld the metal object to the terminals. Statement 43
Warning
Avoid using or servicing any equipment that has outdoor connections during an electrical storm. There
may be a risk of electric shock from lightning. Statement 1088
Warning
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning
Read the installation instructions before connecting the system to the power source. Statement 1004Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the
protective device is rated: For a -48/-60 VDC installation, the wire shall be 12 AWG minimum with a 20
A branch circuit breaker. For a 24 VDC installation, the wire shall be 8 AWG minimum with a 40 A
branch circuit breaker. Statement 1005
Warning
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Safety with Electricity

This product relies on the building’s installation for short-circuit (overcurrent) protection. For an AC
installation, ensure that the branch circuit breaker is rated a maximum 20A. Statement 1005
Warning
There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with the
same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the
manufacturer’s instructions. Statement 1015
Warning
This unit is intended for installation in restricted access areas. A restricted access area can be accessed
only through the use of a special tool, lock and key, or other means of security. Statement 1017
Warning
When you connect or disconnect the power and/or alarm connector with power applied, an electrical arc
can occur. This could cause an explosion in hazardous area installations. Be sure that all power is removed
from the switch and any other circuits. Be sure that power cannot be accidentally turned on or verify that
the area is nonhazardous before proceeding. Statement 1058
Warning
Take care when connecting units to the supply circuit so that wiring is not overloaded. Statement 1018Warning
The plug-socket combination must be accessible at all times, because it serves as the main disconnecting
device. Statement 1019
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. Statement 1021
Warning
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement
1022
Warning
To reduce the risk of fire, use only 26 AWG or larger telecommunication line cord. Statement 1023Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority
or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Warning
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Safety with Electricity

Use copper conductors only. Statement 1025Warning
This unit might have more than one power supply connection. All connections must be removed to
de-energize the unit. Statement 1028
Warning
To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the
handles on modules (such as power supplies, fans, or cards); these types of handles are not designed to
support the weight of the unit. Statement 1032
Warning
Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV)
requirements in IEC 60950 based safety standards. Statement 1033
Warning
Do not use this product near water; for example, near a bath tub, wash bowl, kitchen sink or laundry tub,
in a wet basement, or near a swimming pool. Statement 1035
Warning
Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
Statement 1036
Warning
Before opening the unit, disconnect the telephone-network cables to avoid contact with telephone-network
voltages. Statement 1041
Warning
This product requires short-circuit (overturned) protection, to be provided as part of the building installation.
Install only in accordance with national and local wiring regulations. Statement 1045
Warning
When installing or replacing the unit, the ground connection must always be made first and disconnected
last. Statement 1046
Warning
Never install an AC power module and a DC power module in the same chassis. Statement 1050Warning
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Safety with Electricity

When you connect or disconnect the power and/or alarm connector with power applied, an electrical arc
can occur. This could cause an explosion in hazardous area installations. Be sure that all power is removed
from the switch and any other circuits. Be sure that power cannot be accidentally turned on or verify that
the area is nonhazardous before proceeding. Statement 1058
Warning
This equipment is intended to be grounded to comply with emission and immunity requirements. Ensure
that the switch functional ground lug is connected to earth ground during normal use. Statement 1064
Warning
If you connect or disconnect the console cable with power applied to the switch or any device on the
network, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be
sure that power is removed or the area is nonhazardous before proceeding. Statement 1080
Warning
Installation of the equipment must comply with local and national electrical codes. Statement 1074Warning
Hazardous voltage or energy may be present on power terminals. Always replace cover when terminals
are not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement
1086
Warning
When working on equipment powered by electricity, follow these guidelines:
•Locate the room’s emergency power-off switch. If an electrical accident occurs, you will be able to
quickly turn off the power.
•Before working on the system, turn off the DC main circuit breaker and disconnect the power terminal
block cable.
•Before doing the following, disconnect all power:
◦Working on or near power supplies
◦Installing or removing a router chassis or network processor module
◦Performing most hardware upgrades
•Never install equipment that appears damaged.
•Carefully examine your work area for possible hazards, such as moist floors, ungrounded power extension
cables, and missing safety grounds.
•Never assume that power is disconnected from a circuit; always check.
•Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
•If an electrical accident occurs, proceed as follows:
◦Use caution, and do not become a victim yourself.
◦Turn off power to the router.
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Safety with Electricity

◦If possible, send another person to get medical aid. Otherwise, determine the condition of the
victim, and then call for help.
◦Determine whether the person needs rescue breathing or external cardiac compressions; then take
appropriate action.
In addition, use the following guidelines when working with any equipment that is disconnected from a power
source, but still connected to telephone wiring or network cabling:
•Never install telephone wiring during a lightning storm.
•Never install telephone jacks in wet locations unless the jack is specifically designed for it.
•Never touch uninsulated telephone wires or terminals unless the telephone line is disconnected at the
network interface.
•When installing or modifying telephone lines, use caution.
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.
This equipment has been designed for connection to TN and IT power systems. Statement 1007Warning
Preventing ESD Damage
This equipment needs to be grounded. Use a green and yellow 6 AWG ground wire to connect the host
to earth ground during normal use. Statement 383
Warning
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD can occur when
electronic printed circuit cards are improperly handled and can cause complete or intermittent failures. When
removing and replacing modules, always follow ESD prevention procedures:
•Ensure that the router chassis is electrically connected to earth ground.
•Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. To channel unwanted
ESD voltages safely to ground, connect the clip to an unpainted surface of the chassis frame. To guard
against ESD damage and shocks, the wrist strap and cord must operate effectively.
•If no wrist strap is available, ground yourself by touching a metal part of the chassis.
•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 available ejector levers or captive installation screws, if any, to release
the bus connectors from the backplane or midplane.
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Power Supply Considerations

•Handle components by their handles or edges only; do not touch the printed circuit boards or connectors.
•Place a removed component board 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.
•Never attempt to remove the printed circuit board from the metal carrier.
For the safety of your equipment, periodically check the resistance value of the antistatic wrist strap. It
should be between 1 and 10 Mohm.
Note
Site Planning
These sections describe how to plan for the installation of the Cisco ASR 903 Router as a satellite shelf:
General Precautions
Observe the following general precautions when using and working with your Cisco ASR 903 Router as a
satellite shelf system:
•Keep the system components away from radiators and heat sources and do not block cooling vents.
•Do not spill food or liquids on the system components and never operate the product in a wet environment.
•Do not push any objects into the openings of the system components. Doing so can cause fire or electric
shock by shorting out interior components.
•Position system cables and power supply cables carefully. Route system cables and the power supply
cable and plug so that they cannot be stepped on or tripped over. Be sure that nothing else rests on the
system component cables or power cable.
•Do not modify power cables or plugs. Consult a licensed electrician or your power company for site
modifications. Always follow your local and national wiring rules.
•If you turn off your system, wait at least 30 seconds before turning it on again to avoid system component
damage.
Site Planning Checklist
Use the following checklist to perform and account for all the site planning tasks described in this chapter:
•The site meets the environmental requirements of the Cisco ASR 903 Router as a satellite shelf.
•The site’s air conditioning system can compensate for the heat dissipation of the Cisco ASR 903 Router
as a satellite shelf.
•The floor space that the Cisco ASR 903 occupies can support the weight of the system.
•Electrical service to the site complies with the requirements.
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Site Planning

•The electrical circuit servicing the Cisco ASR 903 Router as a satellite shelf complies with the
requirements.
•Consideration has been given to the console port wiring and limitations of the cabling involved, according
to TIA/EIA-232F.
•Ethernet cabling distances for the Cisco ASR 903 Router as a satellite shelf are within limitations.
•The equipment rack in which you plan to install the Cisco ASR 903 Router as a satellite shelf complies
with requirements.
•In selecting the location of the rack, careful consideration has been given to safety, ease of maintenance,
and proper airflow.
Site Selection Guidelines
The Cisco ASR 903 Router as a satellite shelf requires specific environmental operating conditions.
Temperature, humidity, altitude, and vibration can affect the performance and reliability of the router. The
following sections provide specific information to help you plan for the proper operating environment.
The Cisco ASR 903 Router as a satellite shelf is designed to meet the industry EMC, safety, and environmental
standards described in the Regulatory, Safety, and Compliance Information for the Cisco ASR 903 Router.
Environmental Requirements
Environmental monitoring in the Cisco ASR 903 Router as a satellite shelf protects the system and components
from damage caused by excessive voltage and temperature conditions. To ensure normal operation and avoid
unnecessary maintenance, plan and prepare your site configuration before installation. After installation, make
sure that the site maintains the environmental characteristics described in the Cisco ASR 903 System
Specifications section.
Physical Characteristics
Be familiar with the physical characteristics of the Cisco ASR 903 Router as a satellite shelf to assist you in
placing the system in the proper location. For more information, see the Cisco ASR 903 System Specifications
section.
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Site Selection Guidelines

AirFlow Guidelines
Cool air is circulated through the Cisco ASR 903 Router as a satellite shelf by a fan tray located along the
right side of the router. Airflow is side to side, right to left, as shown in this figure.
Figure 1: Cisco ASR 903 as a Satellite Shelf Chassis Airflow
The fan trays maintain acceptable operating temperatures for the internal components by drawing in cool air
through the vents, and circulating the air through the chassis.
The following guidelines will help you plan your equipment rack configuration:
•To ensure adequate airflow through the equipment rack, we recommend that you maintain a clearance
of at least 80 mm on each side of the rack at all times.
•If airflow through the equipment rack and the routers that occupy it is blocked or restricted, or if the
ambient air being drawn into the rack is too warm, an overtemperature condition can occur within the
rack and the routers that occupy it.
•The site should also be as dust-free as possible. Dust tends to clog the router fans, reducing the flow of
cooling air through the equipment rack and the routers that occupy it, thus increasing the risk of an
overtemperature condition.
•Enclosed racks must have adequate ventilation. Ensure that the rack is not congested, because each
router generates heat. An enclosed rack should have louvered sides and a fan to provide cooling air.
Heat that is generated by the equipment near the bottom of the rack can be drawn upward into the intake
ports of the equipment above.
•When mounting a chassis in an open rack, ensure that the rack frame does not block the side intakes and
the exhaust fans.
•When rack-installed equipment fails, especially equipment in an enclosed rack, try operating the equipment
by itself, if possible. Power off all other equipment in the rack (and in adjacent racks) to give the router
maximum cooling air and clean power.
•Avoid locating the Cisco ASR 903 Router as a satellite shelf in a location in which the chassis air intake
vents may draw in the exhaust air from adjacent equipment. Consider how the airflows through the
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AirFlow Guidelines

router; the airflow direction is side to side, with ambient air drawn in from the vents located on the front
right of the chassis.
Airflow Guidelines for Enclosed Rack Installation
To install a Cisco ASR 903 Router as a satellite shelf in a 4-post enclosed cabinet, the front and rear doors of
the cabinet must be removed or be perforated with a minimum of 65 percent open area (70 percent for 800-mm
racks).
If you are mounting the chassis in a 4-post enclosed cabinet, ensure that you have a minimum of 6 inches
(15.24 cm) of clearance on each side of the chassis.
Floor Loading Considerations
Ensure that the floor under the rack supporting the Cisco ASR 903 Router as a satellite shelf is capable of
supporting the combined weight of the rack and all the other installed equipment.
To assess the weight of a fully configured Cisco ASR 903 Router as a satellite shelf, see the Cisco ASR 903
System Specifications section.
For additional information about floor loading requirements, consult GR-63-CORE, Network Equipment
Building System (NEBS) Requirements: Physical Protection .
Site Power Guidelines
The Cisco ASR 903 Router as a satellite shelf has specific power and electrical wiring requirements. Adhering
to these requirements ensures reliable operation of the system. Follow these precautions and recommendations
when planning your site power for the Cisco ASR 903 Router as a satellite shelf:
•The redundant power option provides a second, identical power supply to ensure that power to the chassis
continues uninterrupted if one power supply fails or input power on one line fails.
•In systems configured with the redundant power option, connect each of the two power supplies to a
separate input power source. If you fail to do this, your system might be susceptible to total power failure
due to a fault in the external wiring or a tripped circuit breaker.
•To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and the breakers.
•Check the power at your site before installation and periodically after installation to ensure that you are
receiving clean power. Install a power conditioner if necessary.
•Provide proper grounding to avoid personal injury and damage to the equipment due to lightning striking
power lines or due to power surges. The chassis ground must be attached to a central office or other
interior ground system.
This product requires short-circuit (overturned) protection, to be provided as part of the building installation.
Install only in accordance with national and local wiring regulations. Statement 1045
Warning
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Floor Loading Considerations

The installation of the Cisco ASR 903 Router as a satellite shelf must comply with all applicable codes
and is approved for use with copper conductors only. The ground bond fastening hardware should be of
compatible material and should preclude loosening, deterioration, and electrochemical corrosion of
hardware and joined material. The chassis ground must be attached to a central office or other interior
ground system using a 6-AWG gauge wire, copper ground conductor at a minimum.
Note
The maximum power draw of the Cisco ASR 903 Router satellite shelf chassis and its configurable hardware
components are listed in the following table. The maximum power draw values are not affected by whether
the router chassis contains one or two AC or DC power supplies.
Maximum Power Draw ValueHardware Component
195 WSat-ASR903-nV Router satellite shelf chassis with
two power supplies, one fan tray, and one RSP1A
210 WSat-ASR903-nV Router satellite shelf chassis with
two power supplies, one fan tray, and one RSP1B
100 WA900-RSP1A-55 (standby)
100 WA900-RSP1B-55 (standby)
13.0 WA900-IMA1X (1-port 10-GE XFP interface module)
17.5 WA900-IMA8T (8-port 1-GE RJ-45 interface module)
17.5 WA900-IMA8S (8-port 1-GE SFP interface module)
Electrical Circuit Requirements
Each Cisco ASR 903 Router as a satellite shelf requires a dedicated electrical circuit. If you equip it with dual
power feeds, provide a separate circuit for each power supply to avoid compromising the power redundancy
feature.
The Cisco ASR 903 Router as a satellite shelf can be powered by a DC source or an AC source. Ensure that
equipment grounding is present and observe the power-strip ratings. Make sure that the total ampere rating
of all products plugged into the power strip does not exceed 80 percent of the rating.
For more information about the Cisco ASR 903 Router power supply, see theCisco ASR 903 Router Hardware
Installation Guide.
Site Cabling Guidelines
This section contains guidelines for wiring and cabling at your site. When preparing your site for network
connections to the Cisco ASR 903 Router as a satellite shelf, consider the type of cable required for each
component, and the cable limitations. Consider the distance limitations for signaling, electromagnetic
interference (EMI), and connector compatibility. Possible cable types are fiber, thick or thin coaxial, foil
twisted-pair, or unshielded twisted-pair cabling.
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Site Cabling Guidelines

Also consider any additional interface equipment you need, such as transceivers, hubs, switches, modems,
channel service units (CSU), or data service units (DSU).
Before you begin, read these important notes about cabling:
•The T1/E1 interface module for the Cisco ASR 903 Router uses a high-density connector that requires
the use of a T1/E1 interface cable and a customer-provided patch panel. For more information, see the
Cisco ASR 903 Router Hardware Installation Guide . Note that the Cisco ASR 903 Router as a satellite
shelf does not use the T1/E1 interface module. The Cisco ASR 903 Router as a satellite shelf supports
only ethernet ports.
•Shielded cables must be used to connect to the DB-25 alarm connector on the fan tray in order to comply
with FCC/EN55022/CISPR22 Class A emissions requirements. For information about the fan tray alarm
port, see the Cisco ASR 903 Router Hardware Installation Guide.
Before you install the Cisco ASR 903 Router as a satellite shelf, have all the additional external equipment
and cables on hand. For information about ordering, contact a Cisco customer service representative.
The extent of your network and the distances between the network interface connections depend in part on
the following factors:
•Signal type
•Signal speed
•Transmission medium
The distance and rate limits referenced in the following sections are the IEEE-recommended maximum speeds
and distances for signaling purposes. Use this information as a guideline in planning your network connections
>prior to installing the Cisco ASR 903 Router as a satellite shelf.
If wires exceed the recommended distances, or if wires pass between buildings, give special consideration to
the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by lightning or other
high-energy phenomena can easily couple enough energy into unshielded conductors to destroy electronic
devices. If you have had problems of this sort in the past, you may want to consult experts in electrical surge
suppression and shielding.
Asynchronous Terminal Connections
The RSP provides a console port to connect a terminal or computer for local console access. The port has an
RJ-45 connector and supports RS-232 asynchronous data with distance recommendations specified in the
IEEE RS-232 standard.
Interference Considerations
When wires are run for any significant distance, there is a risk that stray signals will be induced on the wires
as interference. If interference signals are strong, they can cause data errors or damage to the equipment.
The following sections describe sources of interference and how to minimize its effects on the Cisco ASR
903 system.
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Site Cabling Guidelines

Electromagnetic Interference
All equipment powered by AC current can propagate electrical energy that can cause EMI and possibly affect
the operation of other equipment. The typical sources of EMI are equipment power cords and power service
cables from electric utility companies.
Strong EMI can destroy the signal drivers and receivers in the Cisco ASR 903 and even create an electrical
hazard by causing power surges through the power lines into installed equipment. These problems are rare
but could be catastrophic.
To resolve these problems, you need specialized knowledge and equipment that could consume substantial
time and money. However, you can ensure that you have a properly grounded and shielded electrical
environment, paying special attention to the need for electrical surge suppression.
For information about the electrode magnetic compliance standards supported on the Cisco ASR 903 Router
as a satellite shelf, see Regulatory Compliance and Safety Information for the Cisco ASR 903 Router.
Radio Frequency Interference
When electromagnetic fields act over a long distance, radio frequency interference (RFI) may be propagated.
Building wiring can often act as an antenna, receiving the RFI signals and creating more EMI on the wiring.
If you use twisted-pair cable in your plant wiring with a good distribution of grounding conductors, the plant
wiring is unlikely to emit radio interference. If you exceed the recommended distances, use a high-quality
twisted-pair cable with one ground conductor for each data signal.
Lightning and AC Power Fault Interference
If signal wires exceed the recommended cabling distances, or if signal wires pass between buildings, you
should consider the effect that a lightning strike in your vicinity might have on the Cisco ASR 903 Router as
a satellite shelf.
The electromagnetic pulse (EMP) generated by lightning or other high-energy phenomena can couple enough
energy into unshielded conductors to damage or destroy electronic equipment. If you have previously
experienced such problems, you should consult with RFI and EMI experts to ensure that you have adequate
electrical surge suppression and shielding of signal cables in your Cisco ASR 903 Router as a satellite shelf
operating environment.
Rack-Mounting Guidelines
These sections provide guidelines for rack-mounting the Cisco ASR 903 Router as a satellite shelf:
Rack-Mounting Precautions
These rack-mount guidelines are provided to ensure your safety:
•Do not move large racks by yourself. Due to the height and weight of a rack, a minimum of two people
are required to accomplish this task.
•Ensure that the rack is level and stable before extending a component from the rack.
•Ensure that proper airflow is provided to the components in the rack.
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Rack-Mounting Guidelines

•Do not step on or stand on any component or system when servicing other systems or components in a
rack.
•When mounting the Cisco ASR 903 Router as a satellite shelf in a partially filled rack, load the rack
from the bottom to the top, with the heaviest component at the bottom of the rack.
•If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the
unit in the rack.
Rack Selection Guidelines
The Cisco ASR 903 Router as a satellite shelf can be mounted in most two-post or four-post, 19-inch equipment
racks that comply with the Electronic Industries Association (EIA) standard for equipment racks (EIA-310-D
19-inch). The rack must have at least two posts with mounting flanges to mount the chassis.
When mounting a chassis in any type of rack equipment, ensure that the inlet air to the chassis does not
exceed 65 degrees C.
Caution
The distance between the center lines of the mounting holes on the two mounting posts must be 18.31 inches
± 0.06 inch (46.50 cm ± 0.15 cm). The rack-mounting hardware included with the chassis is suitable for most
19-inch equipment racks.
Consider installing the Cisco ASR 903 Router as a satellite shelf in a rack with the following features:
•Network Equipment Building System (NEBS) compliant, 19-inch (48.3-cm) wide rack.
•EIA or European Telecommunications Standards Institute (ETSI) hole patterns in the mounting rails.
The required mounting hardware is shipped with the Cisco ASR 903. If the rack that you plan to install
the system in has metric-threaded rails, you must provide your own metric-mounting hardware.
•Perforated top and open bottom for ventilation to prevent overheating.
•Leveling feet for stability.
The Cisco ASR 903 Router as a satellite shelf should not be installed in an enclosed rack because the
chassis requires an unobstructed flow of cooling air to maintain acceptable operating temperatures for its
internal components. Installing the router in any type of enclosed rack—even with the side doors removed
—could disrupt the airflow, trap heat next to the chassis, and cause an overtemperature condition inside
the router. If you use an enclosed rack, ensure that there are air vents on all sides of the rack and there is
proper ventilation.
Note
Equipment Rack Guidelines
The placement of the rack can affect personnel safety, system maintenance, and the system’s ability to operate
within the environmental characteristics described in the Cisco ASR 903 System Specifications section. Choose
a proper location for the Cisco ASR 903 Router as a satellite shelf by following these guidelines.
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Rack-Mounting Guidelines

Locating for Safety
If the Cisco ASR 903 Router as a satellite shelf is the heaviest or the only piece of equipment in the rack,
consider installing it at or near the bottom to ensure that the rack’s center of gravity is as low as possible.
For additional information about the proper placement of electronic equipment, consult the document
GR-63-CORE, Network Equipment Building System (NEBS) Requirements: Physical Protection.
Locating for Easy Maintenance
Keep at least 3 feet of clear space at the front and back of the rack. This space ensures that you can remove
the Cisco ASR 903 Router as a satellite shelf components and perform routine maintenance and upgrades
easily.
Avoid installing the Cisco ASR 903 Router as a satellite shelf in a congested rack and consider how routing
of cables from other pieces of equipment in the same rack could affect access to the router cards.
The sides of the chassis must remain unobstructed to ensure adequate airflow and prevent overheating inside
the chassis.
Allow the following clearances for normal system maintenance:
•At the top of the chassis—At least 3 inches (7.6 cm)
•Sides of the chassis—3 to 4 ft (91.44 cm to 121.92 cm)
To avoid problems during installation and ongoing operations, follow these general precautions when you
plan equipment locations and connections:
•Use the show environment all command regularly to check the internal system status. The environmental
monitor continually checks the interior chassis environment; it provides warnings about high temperature
and creates reports on other potentially dangerous occurrences. If warning messages are displayed, take
immediate action to identify the cause, and correct the problem.
•Keep the Cisco ASR 903 Router as a satellite shelf off the floor and out of areas that collect dust.
•Follow ESD-prevention procedures to avoid damage to equipment. Damage from static discharge can
cause immediate or intermittent equipment failure.
Locating for Proper Airflow
Ensure that the Cisco ASR 903 Router as a satellite shelf has enough airflow to keep the system operating
within the environmental characteristics and the air temperature is sufficient to compensate for the heat
dissipated by the system. For more information, see the AirFlow Guidelines section.
Installation Checklist
To assist you with your installation and to provide a record of what was done by whom and when, photocopy
the Cisco ASR 903 Router installation checklist shown in this table. Use this to record the completion and
verification of each procedure. After the checklist is completed, place it in your site log along with the other
records pertaining to your new Cisco router.
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Installation Checklist

Table 1: Cisco ASR 903 Router Installation Checklist
DateVerified ByTask
Date on which chassis received
Chassis and all accessories unpacked
Types and numbers of interfaces verified
Safety recommendations and guidelines
reviewed
Installation checklist copied
Site log established and background
information entered
Site power voltages verified
Site environmental specifications verified
Required passwords, IP addresses, device
names, and so on available
Required tools available
Network connection equipment available
Cable-management brackets installed
(optional, but recommended)
AC power cables connected to AC sources
and router
DC power cables connected to DC sources
and router
Network interface cables and devices
connected
System power turned on
System boot complete (STATUS LED is
on)
Shared port adapters are operational
Correct software configuration displayed
after system banner appears
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Installation Checklist

Creating a Site Log
The site log provides a record of all the actions related to installing and maintaining the router. Keep it in an
accessible place near the chassis so that anyone who performs tasks has access to it.
Create the site log prior to the installation. (See Site Log for more information on the site log and a sample
site log that can be used to make copies.)
Receiving the Cisco ASR 903 Router
Each Cisco ASR 903 Router satellite shelf chassis is shipped in a container that is strapped to a pallet, as
illustrated in this figure.
Figure 2: Cisco ASR 903 Router Packaged for Shipping
Packing straps3Outside carton1
Pallet2
We recommend that you have at least two people available to help with the installation and ensure safe
lifting.
Note
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Installing the Cisco ASR 903 Router as a Satellite Shelf
Creating a Site Log

Chassis-Lifting Guidelines
The chassis is not intended to be moved frequently. Before you install the system, ensure that your site is
properly prepared so that you can avoid having to move the chassis later to accommodate power sources and
network connections.
Two or more people are required to lift the chassis. Each time you lift the chassis or any heavy object, follow
these guidelines:
•Never attempt to lift the chassis by yourself. Because of the size and weight of the chassis, use at least
two people to safely lift and move it without causing injury to yourself or damaging the equipment.
•Ensure that your footing is solid, and balance the weight of the chassis between your feet.
•Lift the chassis slowly; never move suddenly or twist your body as you lift.
•Keep your back straight and lift with your legs, not your back. If you must bend down to lift the chassis,
bend at the knees, not at the waist, to reduce the strain on your back muscles.
•Do not remove installed components from the chassis.
•Always disconnect all external cables before lifting or moving the chassis.
To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the
handles on modules (such as power supplies, fans, or cards); these types of handles are not designed to
support the weight of the unit. Statement 1032
Warning
Perform the following to lift a chassis:
SUMMARY STEPS
1. Each person should stand on either side of the chassis and place one hand under the air intake at the bottom
front of the chassis.
2. With the other hand, grasp the top rear of the chassis under the air exhaust, and carefully lift the chassis.
DETAILED STEPS
Step 1 Each person should stand on either side of the chassis and place one hand under the air intake at the bottom front of the
chassis.
Step 2 With the other hand, grasp the top rear of the chassis under the air exhaust, and carefully lift the chassis.
Tools and Equipment
You need the following tools and equipment to install and upgrade the router and its components:
•ESD-preventive cord and wrist strap
•Antistatic mat or antistatic foam
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Chassis-Lifting Guidelines