Cisco uBR7246 Rack-Mount and Cable-Management Kit Installation Instructions

Product Numbers: ACS-uBR7200-RMK=, uBR7246

This document explains how to install a Cisco uBR7246 universal broadband router in an equipment rack and how to install the cable-management bracket on a Cisco uBR7246 using the rack-mount and cable-management kit. The kit includes rack-mount brackets and a cable-management bracket.

The rack-mount brackets are designed for mounting Cisco uBR7246 universal broadband routers in 19-inch, 4-post and telco-type equipment racks. The cable-management bracket is designed to relieve strain on interface cables that are connected to port adapters and cable modem cards installed in Cisco uBR7246 universal broadband routers.

The cable-management bracket can be installed on Cisco uBR7246 universal broadband routers that are installed on a tabletop or workbench, or in a rack. The rack-mount and cable-management brackets are shipped with Cisco uBR7246 universal broadband routers and are also available as a single field-replaceable unit (FRU).

Note Use this configuration note in conjunction with the Cisco uBR7246 Universal Broadband Router Installation and Configuration Guide that shipped with your Cisco uBR7246 universal broadband router.

This document includes the following sections:

If You Need More Information

The Cisco IOS software running your router contains extensive features and functionality. The effective use of many of these features is easier if you have more information at hand. For additional information on configuring and maintaining the Cisco uBR7246 universal broadband routers, the following documentation resources are available:

Cisco Documentation CD-ROM package

: Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly; therefore, it might be more up to date than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
: If you are reading Cisco documentation on the World Wide Web, you can submit comments electronically. Click Feedback on the toolbar, and then select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.

For Cisco IOS software configuration information, refer to the modular configuration and modular command reference publications in the Cisco IOS software configuration documentation set that corresponds to the software release installed on your Cisco hardware. You can access Cisco IOS software configuration documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

For hardware installation and maintenance information on the Cisco uBR7246 universal broadband router, refer to the Cisco uBR7246 Universal Broadband Router Installation and Configuration Guide that shipped with your router.

For international agency compliance, safety, and statutory information for wide-area network (WAN) interfaces for the Cisco uBR7246 universal broadband router, refer to the document Regulatory Compliance and Safety Information for the Cisco uBR7246 Universal Broadband Router (Document Number 78-4977-xx)

To obtain general information about documentation, refer to the section "Cisco Connection Online," on page 27, or call customer service at 800 553-6387 or 408 526-7208. Customer service hours are 5:00 a.m. to 6:00 p.m. Pacific time, Monday through Friday (excluding Cisco-observed holidays). You can also send e-mail to cs-rep@cisco.com, or you can refer to the Cisco Information Packet that shipped with your router.

Cisco uBR7246 Universal Broadband Router Overview

The Cisco uBR7246 universal broadband router is part of a new class of Cisco data-over-cable products designed to allow two-way transmission of digital data over hybrid fiber coaxial (HFC) cable. The Cisco uBR7246 supports Internet Protocol (IP) routing with a wide variety of protocols and any combination of Ethernet, Fast Ethernet, high-speed serial interface (HSSI), and asynchronous transfer mode (ATM) media.

Network interfaces reside on port adapters that provide the connection between the router and external networks (the Internet). HFC interfaces reside on cable modem cards and provide the connection to the cable television (CATV) network. The Cisco uBR7246 has four slots for the cable modem cards, two slots for port adapters, one slot for an Input/Output (I/O) controller, and one slot for a network processing engine. You can place the port adapters in either of the two available slots and the cable modem cards in any of the four available slots.

Note Cisco cable modem cards for the Cisco uBR7246 will be available for delivery in Q1 1998.

There are bays for up to two AC-input power supplies. The Cisco uBR7246 will operate with one power supply. While a second power supply is not required, it allows load sharing and increased system availability.

The front of the Cisco uBR7246 provides access to an I/O controller, up to two network interface port adapters, and up to four cable modem cards (see Figure 1). The I/O controller contains the following: a local console port for connecting a data terminal (or data terminal equipment [DTE]) and an auxiliary port for connecting a modem (or other data communications equipment [DCE]) or other devices for configuring and managing the router; two Personal Computer Memory Card International Association (PCMCIA) slots for Flash memory cards; an optional Fast Ethernet port. The Fast Ethernet port provides a 100-Mbps connection to the network.

Note The I/O controller is available with or without a Fast Ethernet port. Figure 1 shows an I/O controller with a Fast Ethernet port.

Figure 1: Cisco uBR7246 Universal Broadband Router--Front View

The port adapters installed in the Cisco uBR7246 are of the same type as those installed in the Cisco 7200 series routers and on the second-generation Versatile Interface Processors (VIP2s) in the Cisco 7500 series routers. The port adapters installed in the Cisco uBR7246 support online insertion and removal (OIR).

Caution The I/O controller does not support OIR. You must power down the Cisco uBR7246 before removing the I/O controller from the universal broadband router.

Caution The cable modem cards currently available for field trials do not support OIR. You must power down the Cisco uBR7246 before removing any of these cable modem cards from the universal broadband router.

Port adapter slots in the Cisco uBR7246 universal broadband router are numbered from left to right, port adapter slot 1 and port adapter slot 2. Port adapter slot 0 is the Fast Ethernet port on the I/O controller (refer to Figure 2). The cable modem card slots are numbered from top to bottom, cable modem card slot 3, slot 4, slot 5, and slot 6.

In Figure 1 and Figure 2, a blank port adapter is installed in slot 1. To ensure adequate airflow across the port adapters and cable modem cards, each port adapter slot must be filled with a port adapter or a blank port adapter, and each cable modem card slot must be filled with a cable modem card or a blank cable modem card.

Figure 2: Port Adapter and Cable Modem Card Slot Numbering

The rear of the Cisco uBR7246 universal broadband router provides access to the network processing engine and up to two power supplies (refer to Figure 3).

Figure 3: Cisco uBR7246 Universal Broadband Router--Rear View

Caution The network processing engine does not support OIR. You must power down the Cisco uBR7246 before removing the network processing engine from the router.

The network processing engine has no external connectors or LEDs. There is a han dle for removing and installing the network processing engine and two captive installation screws for securing it to the chassis.

The Cisco uBR7246 universal broadband router comes equipped with one 550W AC-input power supply. A fully configured Cisco uBR7246 operates with only one installed power supply; however, a second, optional power supply provides hot-swappable, load-sharing, redundant power. Figure 3 shows the rear of a Cisco uBR7246 universal broadband router configured with two AC-input power supplies.

The power supply has the router's main power switch, OK LED, and an AC-input power receptacle. Adjacent to the lower power supply bay there are two M5 chassis grounding receptacles that provide a chassis ground connection for ESD equipment or a two-hole grounding lug.

Seven internal fans draw cooling air into the chassis and across internal components to maintain an acceptable operating temperature. (Refer to Figure 1.) The seven fans are enclosed in a tray that is located in the subchassis.

Caution To ensure the proper flow of cooling air across the internal components, make sure blank port adapters are installed in unoccupied port adapter slots, blank cable modem cards are installed in unoccupied cable modem card slots, and power supply filler plates are installed in unoccupied power supply bays.

The I/O controller, port adapters, cable modem cards, fan tray, power supplies, and network processing engine slide into their respective chassis slots and connect directly to the universal broadband router's midplane; there are no internal cables to connect. The midplane distributes DC power from the power supplies to the I/O controller, port adapters, cable modem cards, fan tray, and network processing engine.

The midplane also identifies OIR of the port adapters, bridges the PCI buses from the port adapters to packet static random-access memory (SRAM) on the network processing engine, arbitrates traffic across the PCI buses, and generates the clock signals for the port adapters on each PCI bus.

Installation Prerequisites

This section provides a list of parts and tools you need to install the rack-mount and cable-management brackets on Cisco uBR7246 universal broadband routers. This section also includes safety and ESD-prevention guidelines to help you avoid injury to yourself and damage to the equipment.

List of Parts and Tools

You will need the following parts and tools to install the rack-mount and cable-management brackets on your Cisco uBR7246 universal broadband router. If you need additional equipment, contact a service representative for ordering information.

Number 2 Phillips screwdriver
3/16-inch flat-blade screwdriver
Tape measure (optional)
Level (optional)

The rack-mount and cable-management kit includes the following parts:

Two rack-mount brackets for mounting the chassis in the rack
Eight M4 x 6-mm Phillips flathead screws to secure the rack-mount brackets to the chassis
Four M4 x 6-mm Phillips panhead screws to secure the cable-management bracket to the chassis
Four 10-32 x 3/8-inch slotted binderhead screws to secure the rack-mount brackets to the rack rails
One cable-management bracket to relieve the strain on installed port adapter and cable modem card interface cables

Note You must install the cable-management bracket on the right side of the chassis, when viewed from the front. If the cable-management bracket is installed on the left side of the chassis, where the internal fans are located, you will not be able to easily remove or replace the fan tray.

If you install your Cisco uBR7246 universal broadband router with the rack-mount brackets at the front of the chassis (see Figure 8 and Figure 9), you cannot install a cable-management bracket.

Safety Guidelines

Following are safety guidelines that you should follow when working with any equipment that connects to electrical power or telephone wiring.

Safety Warnings

Warning 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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.

Waarschuwing Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is ingesloten.

Varoitus Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).

Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil.

Warnung Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde.

Avvertenza Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che accompagna questo dispositivo.

Advarsel Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.

Aviso Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte o documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo.

¡Advertencia! Este símbolo de aviso significa peligro. Existe riesgo para su integridad física.
Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una traducción de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.

Varning! Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador. Se förklaringar av de varningar som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information (Efterrättelse av föreskrifter och säkerhetsinformation), vilket medföljer denna anordning.

Electrical Equipment Guidelines

Follow these basic guidelines when working with any electrical equipment:

Before beginning any procedures requiring access to the chassis interior, locate the emergency power-off switch for the room in which you are working.
Disconnect all power and external cables before moving a chassis.
Do not work alone when potentially hazardous conditions exist.
Never assume that power has been disconnected from a circuit; always check.
Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.

Telephone Wiring Guidelines

Use the following guidelines when working with any equipment that is connected to telephone wiring or to other network cabling:

Never install telephone wiring during a lightning storm.
Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.
Use caution when installing or modifying telephone lines.
Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.
Use caution when installing or modifying telephone lines.

Lifting Safely

A fully configured Cisco uBR7246 universal broadband router weighs approximately 100 pounds (45.4 kg). The chassis is not intended to be moved frequently. Before you install the router, ensure that your site is properly prepared, so you can avoid having to move the chassis later to accommodate power sources and network connections.

Whenever you lift the chassis or any heavy object, follow these guidelines (see Figure 4):

Always disconnect all external cables before lifting or moving the chassis.
Do not attempt to lift the chassis by yourself; have someone assist you.
Ensure that your footing is solid, and balance the weight of the object 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 lower back muscles.
Lift the chassis from the bottom; grasp the underside of the chassis exterior with both hands.

Figure 4: Lifting the Chassis

Rack-Mount Considerations

The rack-mounting hardware included with your Cisco uBR7246 universal broadband router is suitable for most 19-inch, 4-post and telco-type equipment racks. Some equipment racks provide a power strip along the length of one of the mounting strips. Figure 5 shows a typical 19-inch, 4-post equipment rack with a power strip along one of the back posts.

If your rack has a power strip, consider the position of the strip when planning fastener points to ensure that you will be able to pull port adapters and other FRUs straight out of their respective slots. If the power strip does impair a rear rack-mount installation, remove the power strip before installing the router in the rack, then replace it after the chassis is installed.

Figure 5: Typical 19-Inch Equipment Rack Posts and Mounting Strips

To use the rack-mounting hardware provided with your Cisco uBR7246 universal broadband router, consider the following guidelines:

To mount the universal broadband router between two posts or rails using the brackets, the inner clearance (the width between the inner sides of the two posts or rails) must be at least 17.00 inches (43.18 cm).
The height of the chassis is 10.5 inches (26.67 cm)
When mounting the router in 4-post or telco-type racks, be sure to use all the screws and brackets provided to secure the chassis to the rack posts.

When planning your rack installation, consider the following guidelines:

If you are planning to install a cable-management bracket on a Cisco uBR7246 universal broadband router, do not rack-mount the chassis from the front; instead, rack-mount the chassis from the back.

The cable-management bracket must be installed on the right side of the chassis when viewed from the front.

Install the router in an open rack whenever possible. If installation in an enclosed rack is unavoidable, ensure that the rack has adequate ventilation.

If you plan to use an equipment shelf, ensure that the shelf is constructed to support the weight and dimensions of the chassis. Figure 6 shows the chassis footprint, which you will need if you are designing a customized shelf. We recommend that you use the rack-mount kit designed for your Cisco uBR7246 universal broadband router.
Allow sufficient clearance around the rack for maintenance. If the rack is mobile, you can push it back near a wall or cabinet for normal operation and pull it out when necessary for maintenance (installing or moving port adapters, connecting cables, or replacing or upgrading components). Otherwise, allow 19 inches (48.3 cm) of clearance to remove Cisco uBR7246 universal broadband router FRUs.
Maintain a minimum clearance of three inches on the left and right of the chassis for the cooling air inlet and exhaust vents, respectively. Avoid placing the router in an overly congested rack or directly next to another equipment rack; otherwise, the heated exhaust air from other equipment can enter the inlet air vents and cause an overtemperature condition inside the router.

Caution To prevent chassis overheating, never install your Cisco uBR7246 universal broadband router in an enclosed rack or room that is not properly ventilated or air conditioned.

Always install heavier equipment in the lower half of a rack to maintain a low center of gravity and prevent the rack from falling over.
If you use telco-type racks, be sure that the rack is bolted to the floor and secured because in these types of installations only one end of the chassis mounts to the two rack posts. Ensure that the weight of the chassis does not make the rack unstable.

Figure 6: Cisco uBR7246 Universal Broadband Router Footprint and Outer Dimensions

Rack-Mounting Cisco uBR7246 Universal Broadband Routers

Note If you plan to install your Cisco uBR7246 universal broadband router on a tabletop or workbench, proceed to the section "Installing the Cable-Management Bracket on Cisco uBR7246 Universal Broadband Routers in Workbench or Tabletop Configurations" later in this document.

The chassis mounts to two rack posts with two brackets that attach to either the front, middle, or rear sides of the chassis. To install the rack-mount brackets at the rear of the chassis in a 4-post rack installation, see Figure 7. To install the rack-mount brackets at the front of the chassis with the chassis mounted flush with the front rack in a 4-post rack installation, see Figure 8. To install the rack-mount brackets at the front of the chassis and mounted with the chassis protruding from the rack in a 4-post rack installation, see Figure 9.

Note If you rack-mount a Cisco uBR7246 universal broadband router from the front, you cannot install a cable-management bracket.

Figure 7: Installing the Chassis in a 4-Post Rack--Rear Installation

Figure 8: Installing the Chassis in a 4-Post Rack--Flush-Mounted Front Installation

Figure 9: Installing the Chassis in a 4-Post Rack--Chassis Protruding Front Installation

Figure 10: Installing the Chassis in a Telco-Type Rack

Note If you plan to install the cable-management bracket on a Cisco uBR7246 universal broadband router that you are rack-mounting, you must install the cable-management bracket and rack-mount brackets on the chassis before you install the chassis in the rack. In a 4-post rack installation, the rack-mount brackets must be installed at the rear to install a cable management bracket.

Figure 11: Rack-Mounting the Chassis in a 4-Post Rack with an Installed Cable-Management Bracket

Figure 12: Rack-Mounting the Chassis in a Telco-Type Rack with an Installed Cable-Management Bracket

If you are rack-mounting a Cisco uBR7246 universal broadband router from the rear, the rack-mount brackets are installed at the rear of the chassis, and the cable-management bracket is installed at the front of the chassis, on the right side. You must install both rack-mount brackets and the cable-management bracket before you install the chassis in the rack.

The following sections explain the procedure for rack-mounting theCisco uBR7246 universal broadband router:

Powering Down the Router and Disconnecting Input Power
Installing the Brackets on the Chassis
Installing the Chassis in the Rack
Reconnecting Input Power and Powering Up the Router

These tasks are described in detail in the following subsections.

Powering Down the Router and Disconnecting Input Power

If your Cisco uBR7246 universal broadband router is already installed on a tabletop or workbench, or in a rack, you must power down the router and disconnect input power before attempting the rack-mount procedure.

To power down a Cisco uBR7246 universal broadband router, complete the following steps:

Note Before powering down the router, use the copy running-config startup-config command to save the router's running configuration to nonvolatile memory.

Step 1 Facing the rear of the router, place the power switch (on the power supply) in the OFF (0) position. Repeat this action if a second power supply is installed in the router.

Step 2 Observe the following items:

The green OK LED on the power supply turns off.
The fans stop operating.
The LEDs on the I/O controller turn off.
The LEDs on the port adapters turn off.
The LEDs on the cable modem cards turn off.

To disconnect AC-input power to a Cisco uBR7246 universal broadband router, complete the following steps:

Step 1 Unplug the input power cable from the power source.

Step 2 Push the cable-retention clip that secures the input power cable to the router's power supply to the left.

Step 3 Unplug the other end of the input power cable from the power supply (refer to Figure 13).

Figure 13: Disconnecting Power from a Cisco uBR7246 Universal Broadband Router AC-Input Power Supply

Step 4 Repeat Step 1 through Step 3 if a second power supply is installed.

This completes the procedure for powering down the router and disconnecting input power. Proceed to the following section "Installing the Brackets on the Chassis."

Installing the Brackets on the Chassis

This section explains how to install the rack-mount brackets and cable-management bracket on a Cisco uBR7246 universal broadband router. Before installing the chassis in the rack, you must install a rack-mount bracket on each side of the front, middle, or rear of the chassis. If you are rack-mounting the chassis from the front, you cannot use the cable-management bracket.

If you are rack-mounting the chassis from the rear or middle of the chassis, you can install the rack-mount brackets and cable-management bracket separately; however, both rack-mount brackets and the single cable-management bracket must be installed on the chassis before the chassis is installed in the rack.

The parts and tools required for installing the rack-mount and cable-management brackets are listed in the section "List of Parts and Tools" on page 6 of this document.

Warning After attaching the brackets, and to avoid injury, we recommend that two people install the chassis in the rack. (One person should support the chassis in the rack while the second person installs the fasteners.)

Installing Brackets on the Front of the Chassis

To install the rack-mount brackets on the chassis for a front rack-mount configuration, complete the following steps:

Note If you plan to use the cable-management brackets in your rack-mount configuration, you must install your rack-mount brackets on the rear of the chassis. Proceed to the section "Installing Brackets on the Rear of the Chassis," later in this document.

Step 1 Locate the threaded holes in the front sides of the chassis.

Step 2 If you want the front of the chassis flush with the front of the rack, align the first rack-mount bracket to the threaded holes in the right side of the chassis as shown in Figure 14.

If you want the front of the chassis protruding from the rack, align the first rack-mount bracket to the threaded holes in the right side of the chassis as shown in Figure 15.

Note

Figure 14: Installing the Rack-Mount Brackets on the Front of the Chassis so the Front of the Chassis is Flush with the Rack

Figure 15: Installing the Rack-Mount Brackets on the Front of the Chassis so the Front of the Chassis Protrudes Out of the Rack

Step 3 If you aligned the first rack-mount bracket to the right side of the chassis, thread four M4 x 6-mm Phillips flathead screws through the bracket and into the side of the chassis. Use a number 2 Phillips screwdriver to tighten the screws. (Refer to Figure 14.)

Step 4 Repeat Step 1 through Step 3 for the other rack-mount bracket.

This completes the procedure for installing the rack-mount brackets on the chassis for a front rack-mount configuration. Proceed to the section "Installing the Chassis in the Rack."

Warning To prevent injury, review the safety precautions in the section "Safety Guidelines" before installing the router in a rack.

Installing Brackets on the Rear of the Chassis

To install the rack-mount brackets and cable-management bracket on the chassis for a rear rack-mount configuration, complete the following steps:

Step 1 Locate the threaded holes in the rear sides of the chassis.

Step 2 Align the first rack-mount bracket to the threaded holes in the right side of the chassis.

Align the rack-mount bracket to the chassis as shown in Figure 16.

Note

Figure 16: Installing the Rack-Mount Brackets on the Rear of the Chassis

Step 3 Thread four M4 x 6-mm Phillips flathead screws through the rack-mount bracket and into the side of the chassis. Use a number 2 Phillips screwdriver to tighten the screws.

Step 4 Repeat Step 1 through Step 3 for the other rack-mount bracket.

Step 5 If you plan to include the cable-management bracket in your rear rack-mount configuration, align the bracket with the four right front side holes.

Step 6 Thread four M4 x 6-mm Phillips panhead screws through the cable-management bracket and into the chassis, and tighten the screws.

This completes the procedure for installing the rack-mount brackets and the cable-management bracket on the chassis for a rear rack-mount configuration. Proceed to the section "Installing the Chassis in the Rack."

Installing Brackets in the Middle of the Chassis

To install the rack-mount brackets and cable-management bracket at the middle of the chassis for a telco-type rack-mount configuration, complete the following steps:

Step 1 Locate the threaded holes in the middle sides of the chassis.

Step 2 Align the first rack-mount bracket to the threaded holes in the right side of the chassis.

Align the rack-mount bracket to the chassis as shown in Figure 16.

Note

Figure 17: Installing the Rack-Mount Brackets in the Middle of the Chassis for Telco-Type Racks

Step 3 Thread four M4 x 6-mm Phillips flathead screws through the rack-mount bracket and into the side of the chassis. Use a number 2 Phillips screwdriver to tighten the screws.

Step 4 Repeat Step 1 through Step 3 for the other rack-mount bracket.

Step 5 If you plan to include the cable-management bracket in your telco-type rack-mount configuration, align the bracket the four right front side holes.

Step 6 Thread four M4 x 6-mm Phillips panhead screws through the cable-management bracket and into the chassis, and tighten the screws.

This completes the procedure for installing the rack-mount brackets and the cable-management bracket on the chassis for a middle rack-mount configuration. Proceed to the section "Installing the Chassis in the Rack."

This completes the procedure for installing the rack-mount brackets and the cable-management bracket on the chassis. Proceed to the section "Installing the Chassis in the Rack."

Warning To prevent injury, review the safety precautions in the section "Safety Guidelines" before installing the router in a rack.

Installing the Chassis in the Rack

After installing the brackets on the chassis, you mount the router by securing the rack-mount brackets to two posts or mounting strips in the rack using the four slotted screws provided. Because the brackets support the weight of the entire chassis, be sure to use all four slotted screws to fasten the two rack-mount brackets to the rack posts. Figure 8, Figure 10, Figure 12, and Figure 11 show typical installations in a 19-inch, 4-post rack and a telco-type equipment rack

We recommend that you allow at least one or two inches of vertical clearance between the router and any equipment directly above and below it.

Warning To prevent the rack from tipping when installing the router in telco-type racks, ensure that the rack is bolted to the floor and, if necessary, anchored with appropriate fixtures.

Warning To maintain a low center of gravity, ensure that heavier equipment is installed near the bottom of the rack.

To install the chassis in the rack, complete the following steps:

Step 1 On the chassis, ensure that all captive screws on the network processing engine, the I/O controller, each cable modem card, and each power supply are tightened and the port adapter retention clips are in the locked position.

Step 2 Make sure that your path to the rack is unobstructed. If the rack is on wheels, ensure that the brakes are engaged or that the rack is otherwise stabilized.

Warning To prevent damage to the chassis or personal injury, never attempt to lift or tilt a Cisco uBR7246 universal broadband router using the port adapter handles or the I/O controller handle; they are not designed to support the weight of the router. Always have someone help you when installing your Cisco uBR7246 universal broadband router.

Note Two people should perform Step 3 through Step 6.

Step 3 Position the chassis so that the front end is closest to you; then lift the chassis and move it to the rack. To prevent injury, avoid sudden twists or moves.

Step 4 Slide the chassis into the rack, pushing it back until the brackets (installed at the front or rear of the chassis) meet the mounting strips or posts on both sides of the equipment rack.

Step 5 While keeping the brackets flush against the posts or mounting strips, position the router so that the holes in the brackets are aligned to those in the mounting strips.

Step 6 Insert all four 10-32 x 3/8-inch slotted screws (two on each side) through the brackets and into the mounting strips. (Use two of the bracket holes; one near the top of the bracket and one near the bottom of the bracket.) U sing a 1/4-inch, flat-blade screwdriver, tighten all the screws.

This completes the procedure for installing the chassis in the rack. Proceed to the following section "Reconnecting Input Power and Powering Up the Router."

Reconnecting Input Power and Powering Up the Router

The following procedures explain how to reconnect AC-input power to a Cisco uBR7246 universal broadband router, power up the router, and verify a successful system boot.

To reconnect AC-input power to a Cisco uBR7246 universal broadband router complete the following steps:

Step 1 At the rear of the router, check that the power switch on the power supply is in the OFF (0) position.

Step 2 Push the cable-retention clip to the left, away from the AC receptacle, and plug in the power cable.

Step 3 Secure the cable in the power supply AC receptacle by sliding the cable-retention clip to the right until it snaps around the connector. The cable-retention clip provides strain relief for the AC power cable (refer to Figure 18).

Figure 18: Connecting AC-Input Power to a Cisco uBR7246 Universal Broadband Router

Step 4 Plug the AC power supply cable into the AC power source.

Note Each AC-input power supply operating at 120 VAC requires a minimum of 7A service. We recommend powering a Cisco uBR7246 universal broadband router from a 15A receptacle at the power source.

Step 5 Repeat Step 1 through Step 4 if a second power supply is installed.

This completes the steps for reconnecting AC-input power to a Cisco uBR7246 universal broadband router.

Caution When the power switch on a Cisco uBR7246 power supply is turned to the OFF position, the power supply will enter a reset cycle for ninety (90) seconds.

Wait at least ninety (90) seconds before turning the power switch back to the ON position. If you do not wait the full ninety (90) seconds, the power supply will not restart.

To power up a Cisco uBR7246 universal broadband router that has an installed AC-input power supply, complete the following steps:

Step 1 Check for the following:

Each port adapter is inserted in its slot and the port adapter retention clip is in the locked position.
Each cable modem card is inserted in their respective slots, and their captive installation screws are tightened.
The network processing engine and the I/O controller are inserted in their respective slots, and their captive installation screws are tightened.
All network interface cables are connected to the port adapters.
A Flash memory card is installed in its PCMCIA slot (if present).
Each AC-input power cable is connected and secured with the cable-retention clip. The console terminal is turned on.

Step 2 At the rear of the router, place the power switch on the power supply in the ON (|) position. Repeat this step if a second power supply is installed in the router. The green OK LED on the power supply turns on.

Step 3 Listen for the fans; you should immediately hear them operating.

Step 4 During the boot process, observe the system's LEDs. The LEDs on most of the port adapters go on and off in irregular sequence. Some may go on, go out, and go on again for a short time. On the I/O controller, the IO Power OK LED comes on immediately.

Step 5 Observe the initialization process. When the system boot is complete (a few seconds), the network processing engine begins to initialize the port adapters and the I/O controller. During this initialization, the LEDs on each port adapter behave differently (most flash on and off). The enabled LED on each port adapter goes on when initialization is completed, and the console screen displays a script and system banner similar to the following:

Cisco Internetwork Operating System Software

IOS (tm) 7200 Software (C7200-I-M), Version 11.3(1) [kpfjrgiu 100]

Compiled Sun 21-Dec-97 04:10 by asdbfn

This completes the procedures for connecting input power and powering up the router. This also completes the procedures for rack-mounting Cisco uBR7246 universal broadband router and attaching the cable-management bracket.

Installing the Cable-Management Bracket on Cisco uBR7246 Universal Broadband Routers in Workbench or Tabletop Configurations

This section explains how to install the cable-management bracket on Cisco uBR7246 universal broadband routers in tabletop or workbench installations. Instructions for installing the cable-management bracket on Cisco uBR7246 universal broadband routers in rack-mount installations are in the section "Rack-Mounting Cisco uBR7246 Universal Broadband Routers" on page 12 of this document. The list of tools and parts required to install the cable-management bracket are listed in the section "List of Parts and Tools" on page 6 of this document.

To install the cable-management bracket on Cisco uBR7246 universal broadband routers, complete the following steps:

Step 1 Ensure that input power to the router is turned off and disconnected. Refer to the section "Powering Down the Router and Disconnecting Input Power" on page 18 of this document for instructions.

Step 2 Locate the threaded holes in the right, front side of the chassis.

Step 3 Align the cable-management bracket to the threaded holes in the right side of the chassis at the front. (Refer to Figure 16.)

Step 4 Thread four M4 x 6-mm Phillips panhead screws through the bracket and into the chassis. Use a number 2 Phillips screwdriver to tighten the screws.

This completes the steps for installing the cable-management bracket on a Cisco uBR7246 universal broadband router in a workbench or tabletop configuration.

Table of Contents

Cisco uBR7246 Rack-Mount and Cable-Management Kit Installation Instructions