Technical Documentation
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):
- 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.
- On the rear of each rack rail, partially insert a mounting screw into the highest hole specified for the large shelf in Table 1.
- 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.
- Partially insert screws into the open holes in the ears of the large shelf.
- Tighten all the screws completely.
- Remove the center-mounting brackets by loosening the screws at the top and bottom of each bracket.
- 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
