Cables And Connectors Protection; Electrostatic Discharge - Nortel Secure Router 4134 Installation Manual

14 Secure Router 4134 regulatory information and safety precautions
•
Ensure that your environment meets the requirements for temperature,
humidity, and cleanliness. See
50).
•
Do not overtighten thumb screws or lug nuts. Tighten screws and nuts
until they are snug, plus a quarter turn. If you use a power tool to
tighten screws, use a low torque setting of 2 to 3 in–lb (0.226 to 0.339
N-m).

Cables and connectors protection

The following practices prevent damage to cables and connectors:
•
Use caution when connecting cables. Take care to ensure you insert
each cable connector in the correct port for the purpose you intend.
For example, ensure you connect LAN cables and connectors to LAN
ports on the Secure Router 4134.
•
Support cables to prevent stress on the connectors. If you have
a high-density cable configuration, use an appropriate cable
management system to relieve stress on the cables. Also ensure that
cables are threaded neatly, and that you employ cable ties as required.
•
Do not exceed the bend radius recommended for the type of cable
installed.
•
Fiber-optic cables and connectors require special care:
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—
—

Electrostatic discharge

Electrostatic discharge (ESD) is the transfer of charge between objects at
different electrical potentials. ESD can change the electrical characteristics
of a semiconductor device, and degrade or destroy it. ESD can cause
equipment to malfunction or fail.
To dissipate or neutralize electrostatic charges, use proper grounding and
use conductive or dissipative materials.
Cover connectors with rubber safety plugs when they are not
connected.
Before you install or replace fiber-optic cables, clean the
connectors.
Do not exceed the bend radius that is recommended for fiber-optic
cable. The acceptable bend radius for fiber-optic cable is ten times
its diameter, or 2.5 to 5 cm (1 to 2 in.). If you use a radius of less
than the recommended bend radius, a loss of signal integrity can
result. Loss of signal integrity caused by incorrect bend radius is
difficult to diagnose.
Nortel Secure Router 4134
Installation — Chassis
NN47263-300 03.01 7 September 2009
Copyright © 2007-2009 Nortel Networks. All Rights Reserved.
"Environmental requirements" (page