8
CN 3960 Hardware Installation Guide
O
VERVIEW
H
ARDWARE
O
VERVIEW
Power Status LEDs
The status of the power supplies is visible on the faceplate of the CN 3960. There are
three LEDs relating to power status:
•
PS A
•
PS B
•
POWER
T h e d et a il s of t h es e L E D s is p ro v id ed in t he
Unit Status LEDs
section on page 40.
NOTE:
The system cannot distinguish between a faulty and an unpowered supply. As a
result, if redundant power supplies are installed, but only one supply is connected to a
power source, the unpowered supply will cause the system to report an alarm state. This
alarm will be cleared when the power supply is properly initialized.
Power Supply Fan
Each power supply includes a built-in fan to ensure adequate cooling of the power supply .
These fans are separate from the fans built-into the chassis. To maintain adequate
cooling, the power supply and system fans need to be kept clear of obstructions.
Power Supply Failure
If the power supply fan should fail or another problem occurs with the power supply, an
alarm is raised and an SNMP trap is sent. If the power supply has been disabled, an LED
indication will also occur showing the defective power supply is off. After a problem has
been identified the power supply should be immediately replaced. See
Chapter 2,
Installation
, on page 21 for the procedures to remove a power supply and
install a new unit.
Power Cord
For each CN 3960 device with redundant power supplies you will need two power cords.
The exact specifications of the cord required will vary depending on:
•
AC or DC power supply
•
local power codes — for example, the configuration of the plug that is attached to the
power source will vary for each region around the world. You need to obtain the
correct power cord to meet your local requirements.
WARNING:
All AC power cords must meet the requirements of the local and national
electric codes prior to installation.
Ciena offers the following AC power cables for the CN 3960:
•
AC P ower Cord, IEC C13, Europe
•
AC P ower Cord, IEC C13, North America
•
AC P ower Cord, IEC C13, United Kingdom
•
AC P ower Cord, C13, Universal
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