Cisco CBR 8 User manual

Installing the Cisco cBR Series Converged Broadband Routers

Installing the Cisco cBR Chassis 2

Installation Methods 2

Verifying Rack Dimensions 2

Installing Chassis Installation Brackets 3

Attaching the Chassis Rack-Mount Brackets 5

Installing the Chassis Installation Handle (Optional) 7

Installing the Cisco cBR-8 In a Rack 9

Attaching the Cable-Management Brackets 14

Attaching the Fiber/Cable Routing Guide on the Chassis 15

Attaching a Chassis Ground Connection 21

Revised: May 28, 2015,

Installing the Cisco cBR Chassis

Installation Methods

The Cisco cBR-8 router can be either mounted on the rack at the front or in the middle. Also, the router can be either mounted on a

standard 19-inch wide four-post equipment rack unit or a two-post rack unit.

The Cisco cBR-8 router usually ships fully loaded. Due to a fully configured system weighing approximately

430 lbs, components must be removed from the chassis to make the chassis lighter for rack installation.

Remove all power supplies, supervisor cards, line cards, rear PIC cards and fan modules before

rack-mounting to reduce the weight to approximately 117 lbs. For instructions on how to remove the

components, see the monitoring sections.

Note

Make sure you place the cards and modules in an anti-static bag until you install the chassis in the rack.Note

Verifying Rack Dimensions

Before You Begin

Before you install the chassis, measure the space between the vertical mounting flanges (rails) on your equipment rack to verify that

the rack conforms to the measurements shown in the figure below.

Figure 1: Equipment Rack Dimensions

Procedure

Step 1 Mark and measure the distance between two holes on the left and right mounting rails.

The distance should measure 18.31 inches ± 0.06 inches (46.5 cm ± 0.15 cm).

Measure the pairs of holes near the bottom, middle and top of the equipment rack to ensure that the rack posts

are parallel.

Note

Step 2 Measure the space between the inner edges of the left front and right front mounting flanges on the equipment rack.

The space must be at least 17.7 inches (45 cm) to accommodate the chassis which is 17.45 inches (44.3 cm) wide and fits

between the mounting posts on the rack.

What to Do Next

Install chassis installation brackets.

Installing Chassis Installation Brackets

Each chassis is shipped with two chassis installation brackets in the accessory kit. These brackets aid in installing a chassis into a

19-inch rack and are used as a support base to vertically position and set the chassis before the rack mount screws are installed.

Procedure

Step 1 Determine the position in the rack where you want the chassis to be mounted. If you are mounting more than one chassis

in the rack, then start from the bottom or the center of the rack. Hold the chassis installation bracket where the chassis

bottom will be positioned vertically in the rack.

Step 2 Secure the chassis installation bracket to the front rails with rack mount screws.

If there is a second internal rack rail that is no more than 23 inches from the front rail, position the second installation

bracket to create a rear support for the chassis during installation.

Figure 2: Chassis Installation Bracket

Chassis Installation Bracket1

After the chassis is installed and secured to the rack the chassis installation brackets can be removed from the

rack. These brackets are not needed for supporting the weight of the chassis after all rack mount screws are secured.

Note

Attaching the Chassis Rack-Mount Brackets

Before installing the chassis in the rack, you must install the rack-mount brackets on each side of the chassis.

The rear RF cable-management brackets are installed on the chassis after you install the chassis rack-mount

brackets and mount the chassis in the rack.

Note

Rack-mounting brackets can be attached either in front or middle of the chassis.

•Front Rack-Mount Bracket Installation—The chassis is shipped with the rack-mount brackets installed at the front. Proceed to

installation of the chassis in the rack.

•Middle Rack-Mount Bracket Installation—Install the mounting bracket in the middle of the chassis to allow the chassis to be

recessed in the rack or to be installed in a two-post rack unit.

The chassis installation handle cannot be installed if the chassis is mid-mounted.Note

To install the rack-mount brackets in the middle of the chassis, complete the following steps:

Before You Begin

Required Tools and Equipment

•#2 Phillips torque screwdriver

Procedure

Step 1 Remove the rack-mount brackets installed at the front of the chassis by unscrewing the M5 undercut flat-head screws using

a #2 Phillips torque screwdriver.

Step 2 Locate the threaded holes at the middle on the side of the chassis that align with the holes in the rack-mount bracket.

Step 3 Install the 10 M5 undercut flat-head screws to secure each rack-mounting bracket to the chassis. Five screws must be

installed on each end of the rack-mounting bracket.

Step 4 Repeat the above steps on the other side of the chassis.

Figure 3: Installing Rack-Mount Bracket

Rack-Mount Bracket3Chassis1

M5 undercut flat-head screws2

What to Do Next

Install the chassis installation handle.

Installing the Chassis Installation Handle (Optional)

Before You Begin

Required Tools and Equipment

•#2 Phillips screwdriver

Restrictions

Do not install the chassis installation handle if the chassis is to be mid-mounted in the rack.

Procedure

Step 1 Locate two M5 threaded holes on each chassis rack mount bracket that align with the chassis lifting handle captive screw

holes.

Step 2 Align and hold the chassis lifting handle screw holes with the M5 threaded holes. Insert the captive screws and tighten

them using a #2 Phillips screwdriver.

Ensure that the captive screws are tightly secured before loading the handles to prevent injury or damage to

the chassis.

Caution

Figure 4: Attaching the Chassis Installation Handles to the Cisco CBR-8 Converged Broadband Router

Chassis3Chassis Installation Handle1

—

Captive Screw2

The rack mount brackets support both low and high installation of the handles. This is to facilitate low or high chassis

installation in the rack.

What to Do Next

Install the Cisco cBR-8 router in the rack.

Installing the Cisco cBR-8 In a Rack

Rack mount the chassis by securing the rack-mount brackets to two posts or mounting strips in the rack. Use at least four rack-mount

screws on each side to fasten the two rack-mount brackets to the rack posts because the rack-mount brackets support the weight of

the entire chassis.

You can install the chassis in either a four-post rack unit or a two-post rack unit.

Before You Begin

1Verify rack dimensions.

2Install chassis installation brackets.

3Attach the chassis rack-mount brackets.

4Install the chassis installation handle (optional).

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:

Warning

•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.

•If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing

the unit in the rack.

Installing the Cisco cBR in a Four-Post Rack

Procedure

Step 1 Ensure that all screw fasteners on the installed components are securely tightened on the chassis.

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

is stabilized.

Step 3 With two or more people, lift the chassis (partially unloaded) into position between the rack posts and rest it on the chassis

installation bracket. The chassis can be lifted using the installation handle, the two large side handles, the rear Power entry

area handles or by placing your hands underneath the bottom of the chassis. With the installation handle installed, you can

tilt the chassis up in the front in order to get your hands underneath the bottom of the chassis.

Figure 5: Lifting the Chassis into Position

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