Cisco AGS+, Hardware Installation And Maintenance

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Applique
LED
Indicators
FDDO
Appque
LED
kuUcators
Unused
green
Unused
yellow
Unused
yellow
PHYALEDO
PHYA
LED
PHYALED2
PHY LED
PHY LED
PHY
LED
PFIY-x
LEDs1
State
Line
State
Unknown
LSU
Halt
Line
State
HLS
Master Line
State
MLS
Active Line
State
ALS
Noise Line
State
NLS
Quiet Line
State
QLS
Idle
Line
State
ILS
LED
on
LED
off
Elasticity
Buffer Overfiow/Underfiow
OVUF
bank
of nine
LEDs
shown
in Figure
B-
14
is
located on each
FDDI
applique
to
indicate the
current
line state
of each
of the
two
physical
connections
to the applique
PHY-A
and
PHY-B
as
described
in
Table
B-5 When
the ring
is operational
when
the line
protocol is
up
the
LEDs
will
oscillate
between ILS
ALS
and
MLS
These
line states are defined in Table
B-5
The ILS
will
predominate
so
LED
will
glow most
brightly
LED
will
be
slightly
dimmer
And LED
will
be
almost completely dark The X3T9.5
FDDI
specification explains the meaning
of these
line states
in
detail
Face
plate
Figure
B-14 FDDI Applique
LEDs APP-LSS ShownApplies
to All Four FDDI Applique Models
Table
B-5
Line State Indications
for
PHY-A and PHY-B
LEDs
B-b
AGS
Hardware
Installation
and Maintenance