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ND-46550 (E) CHAPTER 3
Page 13
Revision 2.0
CHAPTER 3 INSTALLATION
1. PRECAUTION IN HANDLING
When handling cards, the installer must wear a grounded wrist strap to protect the circuit card from static
electricity, and the installer must engage in the work on a grounded conductive work surface. Figure 3-1 illustrates
the actions to take while handling circuit cards.
Figure 3-1 Static Electricity Guard
CARD FRONT
PBX
frame earth of equipment.
Connect ground wire to
FRAME GROUND SCREW
Never touch components
or soldered surface with
bare hands.
WRIST STRAP
• When plugging/unplugging circuit card
• When holding circuit card