Allied Telesis X3112 User Manual

SwitchBlade x3112 Installation Guide

53

2. Ensure that the following hardware components are included in your 

package. If any item is missing or damaged, contact your Allied Telesis 
sales representative for assistance.

– One AT-SBx3112 Chassis (with pre-installed AT-

SBx31FAN Tray and shipping brace)

– Ten line card blank panels
– Three power supply blank panels

Before installing the AT-SBx3112 Chassis, you need to determine where 
the horizontal position of the chassis front panel will be relative to the 
vertical rack rails. The AT-SBx3112 Chassis rack mounting brackets come 
installed from the factory so that the chassis is flush with the rack rails after 
installation. See position “A” in Figure 23 on page 54.

 

 
You may decide to extend (positions “B” through “E” in Figure 23 on page 
54) or recess (position “F” in Figure 24 on page 55) the horizontal position 
of the chassis relative to the rack mounting rails. You can do this by 
removing both rack mounting rails and re-attaching them in the 
appropriate holes on each side of the chassis. The dimension (X) between 
the front panel and the rack rails is given in Table 13 for each rack 
mounting bracket position. 

Table 13. Front Panel to Rack Rail Dimensions

19

A 

(Factory Installed - Flush)

3.69 mm (0.145 in)

19

B

(Recessed)

-27.39 mm (-1.078 in)

19

C

27.39 mm (1.078 in)

19

D

47.71 mm (1.878 in)

19

E

140.85 mm (5.545 in)

20

F

(Reverse Position)

374.16 mm (14.731 in)