Nortel Passport 15000 Preparation Manual page 89

To mount the Passport 15000 or 20000 shelf into a rack without using the
adapter brackets provided in the kit, the rack must meet the following criteria:
• The mounting holes must be at 25 mm (1.0 in.) vertical increments
starting 12.5 mm (0.5 in.) from the bottom.
• The horizontal spacing between mounting holes must be 515 mm
(20.3 in.).
• A horizontal width of 535 mm (21.0 in.)across mounting flanges.
The mounting adapter brackets have hole spacing that is compliant to the
23-inch EIA standard.
A shelf installed in a cabinet with solid or perforated doors and side panels
may generate acoustic noise greater than 60 dBA. For information about
Passport 15000 and 20000 acoustic noise compliance see, "Acoustic noise
compliance" (page 163).
Passport 15000, 20000 Site Requirements and Preparation Guide
Chapter 2 Planning considerations 89
5.2S2