Nortel CS 1000M HG Manual page 28

28 Product description
unit is connected to the local master system monitor or to a slave system
monitor hierarchically higher than the highest Fiber Remote Multi-IPE
Interface unit.
Diagnostic functions
The Fiber Remote Multi-IPE Interface provides diagnostic functions to
monitor the equipment performance and to automatically issue an alarm
that corresponds to the type of fault detected. The alarm may be issued in
the form of a lit LED, a message displayed on the MMI terminal or system
maintenance terminal, a printed error report, or a combination of these
fault indicators.
The Fiber Remote Multi-IPE Interface system diagnostics consist of:
•
•
•
Background diagnostics continuously monitor the fiber-optic link and the
superloop timeslots for error conditions, loss of clock, loss of signal, and
loss of frame.
When the fiber-optic link fails or the superloop shows an error condition, a
normally open alarm relay contact closes, activating an alarm. An LED is
lit at each end of the fiber-optic link, an error report is displayed on the
maintenance terminal at each end of the link, and an entry is made in the
Fiber Remote Multi-IPE Interface system alarm log indicating time, date,
location, and type of alarm. A RED ALARM indicates that an error was
detected at this side of the fiber-optic link and a YELLOW ALARM indicates
that the error condition was detected at the opposite side of the fiber-optic
link.
The Fiber Remote Multi-IPE Interface can be configured to automatically
clear the alarm condition when the problem clears; otherwise, it can be
configured to continue to indicate the alarm condition until it is cleared by
a command over the MMI terminal or by pressing the ALM CLEAR button
on the Fiber Remote Multi-IPE Interface unit faceplate at the local or the
remote site.
On-line diagnostics do not interfere with normal system operation and are
performed on an active link.
Off-line diagnostics can interfere with normal system operation and are
performed on an idle or faulty fiber-optic link or a disabled superloop. To
minimize the impact of off-line testing, a superloop should first be software
disabled and then tested while the other superloops are carrying traffic.
Copyright © 2007, Nortel Networks
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background diagnostics
on-line diagnostics
off-line diagnostics
Nortel Communication Server 1000
Fiber Remote Multi-IPE Interface Fundamentals
NN43021-556 01.01 Standard
Release 5.0 30 May 2007