PRODUCT LIABILITY
PL- 8
2.2.7 Lightning Strikes
2.3 Disposables and Periodic-replacement Parts
WARNING
The grounding system must protect the PBX, MDF, main power source, MAT, printer, modems, etc.
from damage caused by lightning strikes and electrical surges.
All the grounding conductors must have a resistance of less than one Ω to bring a zero-voltage
reference to the system components.
To achieve this, the following ground conductors must connect to the Primary Ground Bar:
• The Earth Ground (E) from the Rectifier
• The Frame Ground (FE) from the PBX
• The Power Ground (PE) from the PBX, through the Rectifier
• The Frame Ground (FE) from the MDF
• The AC service outlets, with AC 100 V plug outlets, for the MAT, printer, modems and any
measurement devices, such as a protocol analyzer.
ATTENTION
Many parts, such as fans, batteries, backup batteries, hard disks, fuses and displays need to be
replaced on a periodic basis. In the event of sudden traffic, a part that is past due for replacement
might lead to a system failure and damage to the PBX.
Replace the disposable items such as ink ribbons, printer cartridges, floppy disks, recording paper
and headsets as needed.
A service contract with the dealer or its service technician to monitor the replacement cycles and to
supply the replacement parts and the necessary disposables is recommended.
To Next Page
Loading...
