Rack Mounting

In general, when more than one piece of equipment is mounted into a rack, you should install the heaviest piece of equipment at the bottom of the rack. Each successive piece you install should be lighter than the piece immediately below it. For planning purposes, a minimally-populated G10 CMTS weighs approximately

80lb (36 kg), and a fully-populated G10 CMTS weighs approximately 140 lb (64 kg).

To rack mount the chassis, follow this procedure:

1.Prior to rack mounting, ensure that proper clearance is maintained between the

G10 CMTS chassis and its surroundings to allow adequate air ventilation to flow into the air intakes and out of the air exhaust:

!A minimum of 3 feet (0.91 m) between the front of the chassis and any other object.

!A minimum of 2 feet (0.61 m) between the rear of the chassis and any other object.

!A minimum of 3 inches between each side of the chassis and any other object.

Figure 25 on page 96 illustrates the air flow through the chassis.

If there is no other equipment installed in the rack, you should install the G10 CMTS as low as possible into the rack.

You must install the power supply faceplate prior to powering on the G10 CMTS to ensure that proper air flow occurs throughout the chassis.

The G10 CMTS does not require any clearance between the bottom of the chassis and the floor. Similarly, there are no clearance requirements between the top of the chassis and the bottom of another G10 CMTS stacked above it on the same rack (see Figure 29 on page 100).

2.We recommend that you install an equipment shelf into the rack that can support the maximum weight (140 lb, or 64 kg) and dimensions of the chassis. The chassis dimensions, when viewed from the bottom, are provided in Figure 26 on page 97.

3.If the chassis will be front-rack mounted, jump ahead to step 5. If the chassis will be mid-rack mounted, proceed to step 4.

4.Remove the seven screws fastening the mounting brackets to the front of the chassis, align the brackets with the corresponding hole patterns in the center of the chassis, and insert the seven screws into the chassis. Apply 20 in-lb of torque to each of the seven screws.

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Install the CMTS	95

Juniper Networks G10 CMTS manual Rack Mounting

Models: G10 CMTS