Nortel Networks 2300 Series - Manual (Page 10)

10
NN47250-300 (320655-E Version 02.01)
Precautions
Protecting cables and connectors
• Support cables in order to prevent any stress on the connectors. If you have a high cable density configuration,
you need to install additional cable management equipment.
• Do not exceed the bend radius recommended for the type of cable installed.
• Fiber optic cables and connectors require special care.
• Protect connectors with rubber safety plugs when cables are not inserted.
• When installing or replacing cables, follow appropriate fiber-cleaning procedures.
• Do not exceed the bend radius recommended for fiber optic cable. The acceptable bend radius for fiber optic
cable is ten times its diameter, or between 2.5 and 5 cm (1 to 2 in.). Anything less than the recommendation can
cause a loss of integrity of data transmission. Loss of integrity because of incorrect bend radius is difficult to
diagnose.
Preventing electrostatic discharge damage
Electrostatic discharge (ESD) is a discharge of stored static electricity that can damage equipment and impair
electrical circuitry. These electrostatic voltages can result from friction, including, but not exclusive to, pulling
cabling through conduits, walking across carpeted areas, and building up of static charge in clothing. ESD damage
occurs when electronic components are improperly handled and can result in complete or intermittent failures.
While networking equipment is commonly designed and tested to withstand common mode ESD events, voltage
sometimes can be discharged to some connector pins but not others, or to some pins before others, which has the
potential to damage the networking equipment.
To protect Nortel equipment against ESD damage, take the following preventive measures before connecting any data
cables to the device:
• Always use anti-static wrist straps. Make sure the strap is adjusted to provide good skin contact.
• Ensure that work surfaces and equipment racks are properly grounded for protection against electrostatic
discharge. The common point must be connected to the building ground wire. In a properly wired building, the
nearest reliable ground is typically at the electrical outlet.
• Avoid contact between equipment and clothing. The wrist or ankle strap only protects the equipment from ESD
voltages on the body; ESD voltages on clothing can still cause damage.
• Avoid touching any connector pins.
• Do not remove the wrist or ankle strap until the installation is complete.
WARNING
Installation must be performed by qualified service personnel only. Read and
follow all warning notices and instructions marked on the product or included
in the documentation. Before installing the product, read
Translated caution
statements, warning conventions and warning messages (page 36) .