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2. Rack Installation

3. Appliance Rail Attachment

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Mount the inner fixed chassis rails on the appliance using three M4 x 4 truss 

head screws on each side.

Align the inner fixed chassis rails on the appliance with the fixed rack rails 

attached to the rack. Carefully slide the appliance into the rack until you hear the 

rails click into place. Push the appliance all the way back into the rack until it 

stops. Secure the appliance in the rack using two 

10-32 x 3/4" truss head screws. Attach the 

screws to the center hole of each 

three-hole tab.

(2) 10-32 x 3/4"

Screws

Outer fixed chassis rails

Inner fixed chassis rails

Locking tab

(3) M4 x 4 

truss head screws

Inner fixed chassis rails

Outer fixed chassis rail

Locking tab

Inner fixed chassis rail

M6 x 12 flat head screws

(2 front and rear)

Telco style rack

Long fixed rack brackets (A)

Short fixed 

rack brackets (B)

Fixed rack brackets "C"

Outer fixed chassis rails

M4 x 4 truss head screws

for rack brackets 

"A" & "B"

(2 front and 2 rear)

(2) M4 x 4 truss head screws 

for rack brackets "C"

Outer fixed chassis rail

Inner fixed chassis rail

Locking tab

M4 x 4 Screws

(2 front)

M4 x 4 Screws

(2 rear)

Outer fixed chassis rails

Medium fixed rack brackets (A)

Short fixed rack brackets (B)

1" of space

(2) cage nuts

(rear)

Outer fixed chassis rails

19" width rack

(2) cage nuts

(front)

(2) M5 x 12

flat head screws

The middle cage nut is for securing 

the appliance in the rack.

*

(2) M5 x 12

flat head screws

Locate the two long fixed rack rails. Remove each inner rail by sliding it all the way 

to the right and pressing the locking tab to release it. You will attach the inner rails 

to the sides of the appliance in part 3, Appliance Rail 

Attachment.

Locate the two long fixed rack rails. Remove each inner rail by sliding it all the 
way to the right and pressing the locking tab to release it. You will attach the 
inner rails to the 
appliance in part 3, 
Appliance Rail 
Attachment.

Step 1 (2a: 19-inch width rack)

Attach the medium (A) and short (B) brackets to the outer fixed chassis rails. 

Attach each short bracket by aligning the two holes at the back of the front bracket 

with the two threaded holes at the front 

of each chassis rail and securing 

with M4 x 4 screws. Attach 

each medium 

bracket by aligning 

the slots on the 

bracket with the 

threaded holes on 

the chassis rail. 

Adjust the medium brackets to suit the depth of the 

rack. Secure using two M4 x 4 screws for each bracket.

Step 2 (2a: 19-inch width rack)

Insert a cage nut into each square hole (three in the front and two in the rear for 

each rail). They click into place. Attach the rail/bracket assemblies to the rack using 

two M6 x 12 flat head screws at the front and rear. The middle cage nut at the front 

will be used later to secure the appliance in the 

rack. Make sure rail/bracket assemblies 

and screws are properly aligned 

at the front and back 

and are level in 

height on the left 

and right sides. 

Step 3 (2a: 19-inch width rack)

Step 1 (2b: telco-style rack) 

Attach the medium (A) and short (B) brackets to the telco-style rack. Mount the 

short brackets in the front and the medium brackets in the back using two M6 x 

12 flat head screws for the 

top and bottom holes of 

each bracket as shown. 

Make sure the brackets are 

aligned in the rack in the 

front and back and are 

level in height on the left 

and right sides.

Step 2 (2b: telco-style rack) 

Slide each of the outer fixed chassis rails into the left and right fixed brackets 

and loosely secure them with four M4 x 4 truss head screws on each side (See 

red dotted lines). Leave enough of the outer fixed rails extended in the front to 

loosely attach the 

threaded brackets (C) 

to the outer fixed 

rails using two 

M4 x 4 truss 

head screws 

on each side 

(See blue 

dotted lines). 

Once all four 

screws are in 

place, tighten each one to 

secure the outer fixed chassis rails.

Step 3 (2b: telco-style rack) 

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