ADC HMS-318 Manuel D’Utilisation

2-5

Adapter bracket placement depends on the type of telco-style rack you plan to use to install the HMS-318 List 3 
shelf. First, check the mounting adapter brackets on the shelf to determine whether the factory-installed 
configuration is correct for the planned telco-style equipment rack installation. The following procedure describes 
how to install the adapter brackets. Threaded holes on the HMS-318 List 3 shelf are strategically located to position 
and mount the adapter brackets.

Perform the following procedure to mount the HMS-318 List 3 shelf to the adapter brackets for a 19-inch telco-style 
equipment rack.

To mount the adapter brackets for a 23-inch Telco-style Equipment Rack, select the appropriate position 
(2- or 5-inch recess) and mount the HMS-318 List 3 shelf to the adapter brackets as described in this procedure.

Perform the following procedure to mount the HMS-318 List 3 shelf to the adapter brackets for a 23-inch telco-style 
equipment rack.

 As mentioned in 

 and 

, the adapter brackets are normally attached to the HMS-318 List 3 shelf at the factory 

for a 19-inch telco-style equipment rack. When changing the position of the brackets from a 2- or 5-inch 
recess mounting or vice versa, ensure that you place the appropriate hardware (screws, washers, and so 
on) you remove in a convenient location for re-assembly.

 When mounting a 19-inch HMS-318 List 3 shelf into a 23-inch telco-style equipment rack (see 

Adapter Bracket Mounting Procedure (23-inch Telco-style Equipment Rack)on this page, use extender 
brackets (including mounting hardware: EB-52).

1

Locate the mounting holes of the HMS-318 List 3 shelf for the desired rack width 19 inches (48.3 cm) and 
position (2- or 5-inch recess mounting).

2

Align each adapter bracket with the HMS-318 List 3 shelf and attach to the desired rack width 19 inches 
(48.3 cm) and position (2- or 5-inch recess mounting) with the #6-32 x .25 inch screws (provided).

3

Insert the screws (4 places) and tighten using a #2 Phillips screwdriver.

4

Repeat for the other adapter bracket.

5

You are now ready to install the HMS-318 List 3 shelf into the telco-style rack (see 

 As mentioned in 

 and 

, the adapter brackets are attached to the HMS-318 List 3 shelf at the factory for a 19-

inch telco-style equipment rack. When changing the position of the brackets from a 2- or 5-inch recess 
mounting or vice versa, ensure that you place the appropriate hardware (screws, washers, and so on) you 
remove in a convenient location for re-assembly.

 When mounting a 19-inch HMS-318 List 3 shelf into a 23-inch equipment rack, use extender brackets 

(including mounting hardware: EB-52).