Nortel Communication Server 1000 Series Manual page 116

116 Remote IPE maintenance
3
Self-test
A self-test is automatically performed by each Superloop Network card
and Peripheral Controller card connected to the Fiber Remote Multi-IPE
Interface unit when it is inserted into an operating system module,
when enabling the card, or when powering up or resetting the system.
Alternatively, perform a self-test on these cards using software commands.
The Fiber Remote Multi-IPE Interface unit also performs self-test upon
power up.
This self-test checks general card functions and determines if they are
operating correctly. Upon insertion, the card automatically starts self-test
and it gives an immediate indication of its operating status.
LED indicators
Cards are equipped with red LED indicators, and module power supplies
are equipped with green LED indicators. These indicators show the status
of each card and power supply.
The Fiber Remote Multi-IPE Interface unit provides LED indicators to
show the power status and the alarm status of the Fiber Remote Multi-IPE
Interface unit and the fiber-optic link.
Copyright © 2007-2009 Nortel Networks
.
If the power is low, the problem is in the transmitter. If the
transmitter output power level is within specifications, the
fiber-optic link has too much signal attenuation.
Check the optical patch panel. If attenuation in the patch panel is
high, check the connections or splices in the patch panel.
a To check the fiber-optic link, start a visual continuity check of
the cable using a visual fault locator. This is usually the task
of the fiber-optic link provider. Problems with the fiber-optic
link can be caused by:
•
cable cut or cable stress
•
broken or damaged connectors
•
bad splices
b If the cable is more than 500 meters long, OTDR can be used
to locate the fault in the fiber-optic link.
c If an optical connector is suspected, use a microscope to
inspect the fibers and the ferrules in the connector.
Nortel Communication Server 1000
Fiber Remote Multi-IPE Interface Fundamentals
NN43021-556 03.01
11 May 2009
--End--