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Installing the T320 Mounting Hardware for an Open-Frame Rack

 

To prepare to mount the T320 Core Router into an open-frame rack, install the large mounting shelf on the rack. Install cage nuts, if needed. The small mounting shelf and the spacer bars are not needed.

For open-frame racks, center-mounting the chassis is preferable to front-mounting because the more even distribution of weight provides greater stability. You use the center-mounting brackets to center-mount the chassis in an open-frame rack; you use the front-mounting flanges to front-mount the chassis in an open-frame rack.

For an open-frame rack, Table 1 specifies the holes in which you insert mounting screws (an X indicates a mounting hole location), and cage nuts if needed. The hole distances are relative to one of the standard U divisions on the rack. For reference, the bottom of all mounting shelves is at 0.0015 in. (0.01 U) above a U division.

Table 1: T320 Open-Frame Rack Mounting Hole Locations

Hole

Distance Above U Division

Large Shelf

Chassis

39

22.51 in. (57.2 cm)

12.86 U

X

30

17.26 in. (43.8 cm)

9.86 U

X

X

21

12.01 in. (30.5 cm)

6.86 U

X

X

12

6.76 in. (17.1 cm)

3.86 U

X

X

3

1.51 in. (3.8 cm)

0.86 U

X

X

To install the large mounting shelf (see Figure 1):

  1. Install cage nuts, if needed, in the mounting holes specified in Table 1:
    • On the front side of the rack rails, install cage nuts for the chassis.

    • On the rear side of the rack rails, install cage nuts for the large shelf.

  2. On the rear of each rack rail, partially insert a mounting screw into the highest hole specified for the large shelf in Table 1.
  3. Install the large shelf on the rack. Hang the shelf over the mounting screws using the keyhole slots located near the top of the large shelf flanges.
  4. Partially insert screws into the open holes in the ears of the large shelf.
  5. Tighten all the screws completely.
  6. Remove the center-mounting brackets by loosening the screws at the top and bottom of each bracket.
  7. Optionally, remove the screws the fasten the spacer bars to the front-mounting flange.

The router is shipped with a spacer bar attached to the rear of each front-mounting flange, and two center-mounting brackets attached to the chassis.

Figure 1: Installing the Mounting Hardware for an Open-Frame Rack
Installing the
Mounting Hardware for an Open-Frame Rack