Nortel Communication Server 1000 Series Manual page 27

the J6 of the master system monitor or a slave system monitor that is
hierarchically higher than the highest Fiber Remote Multi-IPE Interface unit
connected to it.
At the Remote IPE site, the system monitor J5 modular jack is connected
to the J5 XSM IN modular jack of the corresponding Fiber Remote
Multi-IPE Interface unit. The information from the system monitor is
transmitted over the fiber-optic link to the local site Fiber Remote Multi-IPE
Interface unit. If multiple Fiber Remote Multi-IPE Interface units are
co-located at the local site, they are daisy-chained and only one Fiber
Remote Multi-IPE Interface 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
Copyright © 2007-2009 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 03.01
11 May 2009
System description 27