Cisco 10720 User Manual
Cisco 10720 Internet Router Cable Management
and Rack Mount Installation Instructions
Customer Order Number: DOC-7813101=
Product Number: 10720-ACCKIT=
This publication contains instructions to set up and mount the router on the mounting rack and to install
and remove the cable-management system provided in the accessory kit for the
Cisco 10720 Internet Router.
Refer to Cisco 10720 Internet Router Installation and Configuration Guide for more information about
this product line.
This publication uses the following terminology to refer to the Cisco 10720 Internet Router,
cable-management and rack mount:
Contents
Product Name Reference
Cisco 10720 Internet Router router
Cisco 10720 Internet Router
Cable-Management
Cisco 10720 Internet Router Rack Mount rack mount
Overview, page 2
Tools and Equipment Required, page 3
Safety, page 3
• Safety Warnings, page 3
• Disconnect Device Warnings, page 4
cable-management system
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Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
Copyright © 2003 Cisco Systems, Inc. All rights reserved.
Overview
Electrostatic Discharge, page 4
Rack Mounting Guidelines, page 5
Cisco 10720 Internet Router Setup Checklist, page 8
Installing the Cable-Management System, page 9
Removing the Cable-Management System, page 11
Rack Mounting the Router, page 12
Obtaining Technical Assistance, page 17
• Contacting Cisco, page 17
• Technical Assistance Center, page 18
–
Contacting TAC by Using the Cisco TAC Website, page 18
–
Contacting TAC by Telephone, page 18
• World Wide Web, page 19
Overview
Related Documentation, page 19
Obtaining Documentation, page 19
• Documentation CD-ROM, page 19
• Ordering Documentation, page 19
• Documentation Feedback, page 20
Electromagnetic Compliance, page 20
Translated Safety Warnings, page 23
The Cisco 10720 Internet Router can be mounted in a variety of ways:
• front, middle or rear rack mounting for:
–
19” EIA
–
23”/24” EIA
–
ETSI
• wall mounting
• desk mounting
The cable-management system, located on the front of the Cisco 10720 Internet Router, organizes the
interface cables that lead into and away from the router. To keep the cables free of sharp bends, extend
the cables from the center out both sides of the cable-management tray. Excessive bending in an interface
cable can degrade performance and possibly harm the cable.
Overview
2
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The cable-management system consists of the following components:
• cable-management tray for managing cables
• cable-management cover to keep the cables from being accidentally stressed
Caution Excessive bending in an interface cable can degrade performance.
You must power down your router before maintaining any field replaceable unit (FRU) module.
Tools and Equipment Required
You will need the following tools and equipment to install and remove the cable-management system
and to mount the router:
• ESD-preventive wrist strap
• Number 1 Phillips screwdriver
• Antistatic bag (optional)
• ESD-preventive wrist strap
• cable ties
Tools and Equipment Required
Safety
This publication contains important safety information that you must read and understand before
attempting to install, remove, or modify any hardware in your router. For more safety information, see
the “Electromagnetic Compliance” section on page 20 and the “Translated Safety Warnings” section on
page 23.
For information about regulatory compliance and safety, see the Regulatory Compliance and Safety
Information for the Cisco 10720 Internet Router publication that shipped with your router.
Please review the safety guidelines in the following sections to avoid injuring yourself or damaging the
equipment:
• Safety Warnings
• Disconnect Device Warnings
Safety Warnings
Before mounting the router or installing the cable-management system, read the following safety
guidelines:
Caution This router is equipped with a redundant power supply. Ensure both power supply connections are
disconnected before beginning any procedure.
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Warning
Read the installation instructions before you connect the system to its power source.
Tools and Equipment Required
3
Electrostatic Discharge
Warning
Warning
Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
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.
Disconnect Device Warnings
The Cisco 10720 Internet Router power source must be disconnected before performing any
maintenance task on the hardware modules. Please refer to the safety warnings in the “Disconnecting
Power from the Router” section of Chapter 5, “Maintaining the Cisco 10720 Internet Router”, in the
Cisco 10720 Internet Router Installation and Configuration Guide.
Electrostatic Discharge
Electrostatic discharge (ESD) can damage circuit boards and other electronic equipment if they are
handled improperly. Such mishandling can result in intermittent or complete failures of the board or
other components of the router.
When handling router components, observe the following guidelines to prevent ESD damage:
• Always use an ESD-preventive wrist strap and ensure that the strap makes adequate contact with
your skin.
• Attach an ESD-preventive wrist strap to your wrist and to the chassis; or to a bare metal surface.
(See Figure 1.)
• The ESD-preventive wrist strap protects equipment from ESD voltages on the body only; ESD
voltages on clothing can still cause damage to electronic components.
Caution For safety, periodically check the resistance value of the ESD-preventive wrist strap. The resistance
measurement should be between 1 and 10 megohms.
Preventing Electrostatic Discharge
Electrostatic discharge (ESD) damage can cause complete or intermittent equipment failures. Cisco
recommends using an ESD-preventive strap when you handle a router or one of its components.
Electromagnetic interference (EMI) shielding is an integral component of the router.
Following are guidelines for preventing ESD damage:
• Always use an ESD-preventive wrist or ankle strap and ensure that it makes good skin contact.
Connect the equipment end of the connection cord to bare metal on the router chassis. (See
Figure 1.)
Disconnect Device Warnings
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Rack Mounting Guidelines
Figure 1 Attaching an ESD-Preventive Strap
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Avoid contact between the component and clothing. The wrist strap protects the component only
from ESD voltages on the body; ESD voltages on clothing can still cause damage.
57849
Rack Mounting Guidelines
Before installing the Cisco 10720 Internet Router in a 19-inch EIA, 23/24-inch EIA or ETSI equipment
rack, consider the following general rack-mounting guidelines:
• Ventilation Guidelines, page 5
• Rack Mounting Clearance Guidelines, page 7
• Multiple Routers in a Rack Maintenance Guidelines, page 7
Ventilation Guidelines
Caution The fan assembly is located in the back of the router chassis. Air flow in the front and back of the router
should not be blocked.
The following section provides information and guidelines to provide adequate ventilation for the
Cisco 10720 Internet Router:
• Install the chassis in an enclosed rack only if the rack has adequate ventilation or an exhaust fan; use
an open rack when possible.
• A ventilation system that is too powerful in an enclosed rack can also prevent cooling by creating
negative air pressure around the router and redirecting the air away from the air intake vent. If
necessary, operate the router with the rack door open or in an open rack.
• Make sure the air baffle located between the fan assembly and power supply is properly seated to
assist in cooling the router.
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Rack Mounting Guidelines
5
Rack Mounting Guidelines
Note To check the air baffle, the cover of the router chassis must be removed. For instructions on
See Figure 2 for the ventilation requirements of the Cisco 10720 Internet Router.
Figure 2 Ventilation Requirements for Cisco 10720 Internet Router
removing the chassis cover, refer to Chapter 5, “Maintaining the Cisco 10720 Internet Router”,
in the Cisco 10720 Internet Router Installation and Configuration Guide.
• Check equipment located near the bottom of the rack as it can generate excessive heat that is drawn
upward and into the intake ports of equipment above, leading to possible overheat conditions.
6 in.
(15.24 cm)
0.75 in.
(1.9 cm)
6 in.
(15.24 cm)
0.75 in.
(1.9 cm)
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Ventilation Guidelines
6
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Rack Mounting Clearance Guidelines
The rack-mounting hardware included with the Cisco 10720 Internet Router is suitable for most 19-inch
EIA, 23- or 24-inch EIA or ETSI equipment racks or telco-style racks.
The following are rack-mounting guidelines for the Cisco 10720 Internet Router:
• If you use a telco-style rack, be sure that the rack is bolted to the floor. The router mounts to the two
rack posts and the rest of the router is cantilevered off of the posts. (See Figure 12.)
• Some telco-style racks are secured to ceiling brackets, if necessary, because of the weight of the
equipment in the rack. Make sure that the rack you are installing the Cisco 10720 Internet Router in
is secure.
Note Warm air exhausts out the back of the router by drawing cool air in through vents located on the front of
the router chassis. Allow sufficient air flow by maintaining 6 inches (15.24 cm) of clearance at both the
inlet and exhaust openings on the router and 0.75 inches (19.1 mm) on each side of the router chassis.
(See Figure 2.)
Multiple Routers in a Rack Maintenance Guidelines
Rack Mounting Guidelines
The Cisco 10720 Internet Router is 17.50 (44.45 cm) W x 3.45 (8.76 cm) H (2 RU) x 18.25 inches (46.36
cm) D. When the cable-management tray is installed the router is 21.80 inches (55.37 cm) D. When
placing multiple routers in a rack, ensure there is sufficient ventilation to accommodate each router.
The heated exhaust air from other equipment can enter the inlet air vents and cause an overtemperature
condition inside the router.
• Install and use the cable-management system included with the router to keep cables organized and
out of the way of line cards and power supply.
• Ensure that cables from other equipment do not interfere with access to the cards and LEDs located
in the front of the router.
• When mounting the router in a rack, be sure to use all of the screws provided to secure the router to
the rack posts.
Figure 3 illustrates the outer dimensions of the Cisco 10720 Internet Router.
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Rack Mounting Clearance Guidelines
7
Cisco 10720 Internet Router Setup Checklist
Figure 3 Cisco 10720 Internet Router Outer Dimensions (Top View
17.50 in.
(44.45 cm)
18.25 in.
(46.36 cm)
Cable management bracket
Chassis
Height = 2 RU
Cisco 10720 Internet Router Setup Checklist
Before you install your Cisco 10720 Internet Router, verify the following:
21.80 in.
(55.37 cm)
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Note The “Environmental Safety Guidelines” section in Chapter 2 of the Cisco 10720 Internet Router
Installation and Configuration Guide provides important information on environmental considerations
and requirements.
Ensure that you have considered the following before you install the router:
• Fan assembly exhaust vents should not be blocked.
• The front of router should not be blocked. Air flow intake is located on the front of the router.
• 24 inches (61 cm) of clearance in front of the Cisco 10720 Internet Router may be needed for
working with line cards, power supplies, attaching network interface cards (NICs) or other
components.
• Location is temperature-controlled, air-conditioned and dust-free.
Cisco 10720 Internet Router Setup Checklist
8
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