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December 20, 2004 Chapter 2: Installation
LTPH-UM-1261-01 2-5
Adapter Bracket Mounting Procedure (19-inch Telco-style Equipment Rack)
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.
Adapter Bracket Mounting Procedure (23-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.
Note: As mentioned in Chapter 1: “Product Description” on page 1-1 and “Mounting the HMS-318 List 3
Shelf” on page 2-4, 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.
Note: 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).
Step Action
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 “Rack Mounting
Procedure” on page 2-7).
Note: As mentioned in Chapter 1: “Product Description” on page 1-1 and “Mounting the HMS-318 List 3
Shelf” on page 2-4, 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.
Note: When mounting a 19-inch HMS-318 List 3 shelf into a 23-inch equipment rack, use extender brackets
(including mounting hardware: EB-52).