Installing Seismic Brackets For A Multiservice Switch 7460 - Nortel 7400 Hardware Installation

366 Chapter 39 Hardware procedures

Installing seismic brackets for a Multiservice Switch 7460

Prerequisites
Procedure steps
NN10600-175 6.1S2
Install seismic brackets onto a seismic cabinet to ensure compliance to Zone
4 earthquake standards when mounting a Nortel Networks Multiservice
Switch 7460 in the cabinet.
• You need a seismic brackets kit with PEC NTEP8025. The brackets are
a pair of side panels and a pair of cross rails as shown in the figure
"Orientation of seismic side panels and seismic cross rails for a
Multiservice Switch 7460" (page 368). The left and right seismic side
panels are identical and symmetrical. The left and right cross rails
number are also identical.
• You need the shelf assembly NTEP80 to be handy for measurements.
• The side panels are the same height as the device because their location
coincides with the location of the device in the cabinet. You must
determine where in the cabinet the device will be positioned before you
can install the brackets.
• The position of the vertical rails inside the seismic cabinet determines
which way the seismic brackets are to be fastened to the rail.
— If the vertical rails are at the front of the seismic cabinet, the side
panels are to be fastened to the rear face of the rail as viewed from
the front of the cabinet.
— If the vertical rails are at the rear of the seismic cabinet, the side
panels are to be fastened to the front face of the rail as viewed from
the front of the cabinet.
• Ground yourself to an appropriate anti-static discharge device while
handling the brackets.
1 Since the side panels are fastened onto one face of the vertical rails and
the shelf assembly is fastened onto the other face, ensure that their
mounting ear holes will not share the same holes on the vertical rails.
Compare the positions of holes on the mounting ears and mark which
ones will be used on the side panel.