RTRV-ALM
17
of
10
Page
RTRV-ALM
Description
Report
Description
Report
(Contd)
Descriptions
RTRV-ALM
11-3.
Table
Meaning
Description
(LOF)
loss-of-frame
a
detected
has
system
The
as
defined
is
LOF
signal.
EC-1
incoming
an
in
condition
consecutive
(five
condition
(OOF)
out-of-frame
an
3
least
at
for
lasts
that
patterns)
framing
STS-1
errored
milliseconds.
or
3STS1E
or
STS1E
the
of
Failure
causes:
Likely
or
STS1E
the
of
failure
end,
far
the
at
CP
equivalent
the
of
failure
end,
near
the
at
CP
equivalent
or
3STS1E
or
STSX-1
the
at
disconnect
cable
a
or
cable,
incoming
connector.
shelf
LOF
EC1
inc.
(LOS)
loss-of-signal
a
detected
has
system
The
line.
EC-1
the
on
condition
cable
or
signal
incoming
the
of
Failure
causes:
Likely
at
CP
3STS1E
or
STS1E
the
of
failure
STSX-1,
the
from
or
STSX-1
the
at
disconnect
cable
a
or
end,
near
the
connector.
shelf
LOS
EC1
inc.
indication
alarm
line
EC-1
an
detected
has
system
The
line.
EC-1
incoming
an
on
(AIS)
signal
the
at
CP
3STS1E
or
STS1E
an
of
Failure
cause:
Likely
end.
far
AIS
line
EC1
inc.
signal
EC-1
received
the
in
(BER)
ratio
error
bit
The
(10
threshold
provisioned
the
exceeds
−
5
10
to
−
9
).
at
CP
3STS1E
or
STS1E
the
of
Failure
causes:
Likely
in
talk
cross
cable,
incoming
the
of
failure
end,
near
the
the
from
signal
incoming
the
of
failure
or
wiring,
office
STSX-1.
(BER)
degrade
sig.
EC1
inc.
receive
end
far
OC-12
the
detected
has
system
The
signal.
OC-12
incoming
the
in
signal
(FERF)
failure
incoming
an
detected
has
end
far
The
causes:
Likely
be
may
This
line.
OC-12
specified
the
on
failure
signal
the
end,
near
the
at
CP
OLIU
the
of
failure
by
caused
the
on
fiber
transmit
the
or
end,
far
the
at
CP
OLIU
line.
specified
FERF
OC12
inc.
indication
alarm
line
OC-12
detected
has
system
The
line.
OC-12
incoming
an
on
(AIS)
signal
end.
far
the
at
CP
OLIU
an
of
Failure
cause:
Likely
AIS
line
OC12
inc.
OC-12
DDM-2000
1997
December
1
Issue
11-365