SET-SYNC
6
of
1
Page
SET-SYNC
NAME
Characteristics
Synchronization
Set
set-sync:
DESCRIPTION
!
CAUTION:
service.
affect
may
command
this
of
Execution
synchronization
switching,
mode
synchronization
the
provisions
command
This
(BBF4)
TG3
the
or
TGS
the
when
signals
timing
the
of
mode
output
and
source,
or
timed,
internally
timed,
externally
be
to
provisioned
is
hardware
pack
circuit
timed.
line
also
will
command
this
later,
and
7.0
Release
OC-12
DDM-2000
with
Beginning
can
pack
This
(BBF4).
TG3
pack,
circuit
timing
3
Stratum
new
the
with
used
be
packs
circuit
TGS
two
the
of
either
with
combination
in
used
be
not
be
can
pack
circuit
BBF4
The
element.
network
same
the
in
(BBF2/BBF2B)
system
a
that
ensure
to
taken
be
must
Care
application.
BBF2B
any
in
used
for
source
sync
its
receive
not
will
packs
circuit
BBF4
new
these
with
equipped
TGS
BBF2B
or
BBF2
either
with
equipped
is
that
system
another
from
line-timing
packs.
modes:
timing
these
of
one
to
provisioned
be
can
DDM-2000
Each
oscillator.
internal
an
from
running
Free
is
reference
timing
This
interface.
optical
incoming
an
from
Line-timed
the
protected,
is
line
optical
the
If
signals.
outgoing
all
generate
to
used
timing
the
as
selected
line
the
also
is
transmission
for
selected
line
reference.
circuit
TG3
or
TGS
Each
signal.
reference
DS1
a
from
timing
External
which
from
and
monitors
it
which
signal
reference
DS1
one
receives
pack
the
to
cross-fed
is
clock
recovered
The
signal.
clock
a
recovers
it
DS1
a
If
shelf.
same
the
on
pack
circuit
TG3
or
TGS
companion
take
will
other
the
pack,
circuit
timing
one
on
detected
is
failure
reference
shelf.
same
the
on
TG3
or
TGS
companion
the
from
reference
the
circuit
TGS
BBF2B
and
BBF2
the
both
by
supported
are
modes
timing
These
in
used
be
can
pack
circuit
BBF2B
The
packs.
circuit
TG3
BBF4
the
and
packs,
applications.
ring
in
use
for
preferred
is
and
application
BBF2
any
timing
the
of
elements
network
other
for
timing
affect
may
command
this
of
Use
network.
NOTE:
ports
DCC
or
CIT
all
for
only
users
privileged
to
available
is
command
This
shelf.
the
on
OC-12
DDM-2000
1997
December
1
Issue
11-309