DLP-
510
363-206-295
1997
December
1,
Issue
18
of
8
Page
TGS
BBF2B
/
TG3
BBF4
10.
1:
NOTE
is
system
the
before
checked
be
should
nodes
all
of
mode
timing
The
to
system
the
cause
may
modes
timing
Improper
service.
in
placed
all
if
example,
(for
interruption
service
a
cause
or
unpredictably
act
mode).
line-timed
to
set
are
nodes
2:
NOTE
The
TGS
BBF2B
/
TG3
BBF4
as
provisioned
be
may
mode
timing
Free
Running,
External
DS1
or
,
Timed
Line
mode,
free-running
In
.
BBF2B
TGS/
TG3
BBF4
on
oscillator
from
timing
gets
TGS
BBF2B
/BBF4
TG3
mode,
timing
external
In
.
TGS
BBF2B
/
TG3
BBF4
timing
gets
mode,
line-timed
In
input.
reference
DS1
external
from
BBF2B
TGS/
TG3
BBF4
from
recovered
clock
reference
a
from
timing
gets
default.
factory
the
is
Free-running
signal.
rate
line
OC-12
received
3:
NOTE
be
can
which
topologies
timing
possible
the
all
depicts
E
Table
comments
some
with
(NE)
elements
network
adjacent
on
encountered
provisioned
is
NE
the
When
application.
their
on
notes
cautionary
or
the
mode,
OUT
SYNC
in
output
DS1
the
with
or
timing
line
for
optical
the
from
timing
its
deriving
is
NE
the
that
is
assumption
NE’s.
two
the
between
shared
interface