Nortel Meridian 1 Planning, Installation And Operating Instructions page 88

Chapter 6 – Bracing cabinets against earthquakes Page 69 of 536
4 Proceed with the system installation
Once the backboard is securely fastened to the wall, proceed with the
equipment installation procedures as described in
"Chapter 7– Preparing for installation" on page 71.
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Option 11C Compact Planning, Installation, Fault Clearing and CCBR Guide