CHAPTER
21-1
Cisco ONS 15454 Procedure Guide, R5.0
March 2005
21
DLPs A400 to A499
Note The terms “Unidirectional Path Switched Ring” and “UPSR” may appear in Cisco literature. These terms
do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration.
Rather, these terms, as well as “Path Protected Mesh Network” and “PPMN,” refer generally to Cisco’s
path protection feature, which may be used in any topological network configuration. Cisco does not
recommend using its path protection feature in any particular topological network configuration.
DLP-A412 Install the DCU Shelf Assembly
Step 1 The DCU chassis requires 1 rack unit (RU) in a standard 19-inch (482.6-mm) or 23-inch (584.2-mm)
rack. Locate the RMU space specified in your site plan.
Step 2 Two sets of mounting brackets are included with the DCU mounting kit, one set each for 19-inch
(482.6-mm) and 23-inch (584.2-mm) racks. Verify that your chassis is equipped with the correct set of
brackets for your rack. Change the brackets as required.
Step 3 Align the chassis with the rack mounting screw holes; one at a time, insert and tighten the four screws.
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.
Statement 1024
Step 4 Connect a frame ground to the ground terminal provided on either side of the chassis. Use minimum
#14 AWG wire.
Purpose If you are installing dispersion compensation modules, use this task to
install the dispersion compensation unit (DCU) chassis.
Tools/Equipment #2 Phillips screwdriver
Crimping tool
#14 AWG wire and lug
Prerequisite Procedures None
Required/As Needed As needed
Onsite/Remote Onsite
Security Level None
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