SET-SYNC
6
of
3
Page
SET-SYNC
src
shelf
which
from
line
the
selects
parameter
This
SynchronizationSource.
For
derived.
be
will
output
synchronization
DS1
the
and/or
timing
line
may
packs
circuit
TG3
BBF4
or
TGS
BBF2B
or
BBF2
the
releases,
ring
values:
following
the
of
one
have
may
parameter
This
used.
be
main-b-1
(default).
releases
ring
For
main-b-2
releases.
ring
For
aisthres
pack
circuit
BBF4
and
BBF2B
the
to
applicable
is
It
AISThreshold.
message
synchronization
incoming
the
sets
parameter
This
types.
is
signal
AIS
which
of
receiving
upon
reference
active
the
of
level
quality
circuit
TG3
BBF4
or
TGS
BBF2B
the
of
output
DS1
the
on
transmitted
than
greater
or
at
is
number
level
quality
incoming
the
as
long
As
packs.
in
listed
is
parameter
This
transmitted.
be
will
AIS
level,
provisioned
the
values:
following
the
of
one
have
may
and
order
quality
ascending
level5
quality
incoming
for
AIS
DS1
Send
value.
default
the
is
This
or
Clk)
SONET
Traceable
S1:
Clock,
Internal
(K2:
5
level
7).
or
6
level
quality
is,
(that
greater
level4
S1:
3,
Stratum
(K2:
4
level
quality
incoming
for
AIS
DS1
Send
greater.
or
3)
Stratum
Traceable
level3
S1:
2,
Stratum
(K2:
3
level
quality
incoming
for
AIS
DS1
Send
greater.
or
2)
Stratum
Traceable
level2
Quality
Sync
(K2:
2
level
quality
incoming
for
AIS
DS1
Send
greater.
or
Unknown)
Trace
Sync
S1:
Unknown,
auto
timing
best
the
choose
to
system
the
allows
SyncAutoreconfiguration
The
Timing.
Line
for
provisioned
is
it
when
use
to
source
synchronization
the
on
based
is
selection
source
synchronization
sources.
(synchronization)
timing
available
the
from
received
messages
source
timing
standby
the
to
place
takes
Switching
Protection
Automatic
will
there
and
nonrevertive,
is
switch
The
fails.
source
active
the
when
reference.
timing
former
the
to
back
switch
automatic
an
be
not
automatically
system
the
enabled,
is
SyncAutoreconfiguration
When
sources
timing
line
between
reconfigures
main-b-1
and
main-b-2
.
NOTE:
OLIUs,
26-type
with
equipped
is
shelf
the
When
auto
is
enabled
default.
by
OC-12
DDM-2000
1997
December
1
Issue
11-311