DLP-
518
363-206-295
1997
December
1,
Issue
27
of
12
Page
(Contd)
Topologies
Provisioning
Synchronization
TG3
TGS/BBF4
BBF2B
E.
Table
Comments
Application
2
NE
1
NE
In
loop.
timing
a
create
might
topology
This
Caution!
will
Timing
Line
for
provisioned
NE
the
topology
this
reference
output
DS1
the
of
that
and
timing
its
derive
Out
Sync
-
External
for
provisioned
NE
the
from
that
with
synchronously
operating
thus
timing
-
External
for
provisioned
NE
The
NE.
respective
Mult
-
External
for
reprovisioned
be
should
Out
Sync
actual
the
in
existing
loop
timing
the
prevent
to
is
Messaging
Synchronization
If
provisioning.
on
reference
output
DS1
the
NE’s,
both
on
enabled
timing
its
derive
will
2
NE
and
AIS
DS1
carry
will
1
NE
If
1.
NE
from
port
output
DS1
the
of
that
and
is
reconfiguration
synchronization
automatic
will
NEs
both
system,
a
in
enabled
and
supported
will
1
NE
loop.
timing
potential
the
break
to
attempt
its
on
AIS
DS1
inserting
by
loop
the
break
to
attempt
to
switch
to
attempt
will
2
NE
port.
output
DS1
the
prevent
to
available,
if
source,
timing
line
another
loop.
timing
Out
Sync
-
Timing
Line
Out
Sync
-
External
to
access
have
NE’s
both
when
used
is
topology
This
The
clocks.
BITS
from
timing
its
receiving
are
and
synchronized
BITS
these
have
to
is
recommendation
If
PRS.
same
the
to
traceable
are
which
references
to
created
subnetwork
the
followed
are
guidelines
these
synchronously.
operating
be
would
NE’s
two
these
by
in
operate
to
designed
are
systems
DDM-2000
Note:
output
DS1
The
topologies.
timing
pleisiochronous
input
the
from
regenerated
is
NE
each
by
generated
distribute
to
used
be
could
and
reference
timing
DS1
same
the
in
collocated
shelves
other
to
reference
this
BITS.
the
on
ports
conserve
to
bay
Mult
-
External
Mult
-
External
a
to
timing
network
distribute
to
used
is
topology
This
a
to
access
with
location
a
from
location
target
for
provisioned
NE
The
reference.
synchronization
NE
the
to
timing
providing
is
Mult,
-
External
turn
in
which
Out,
Sync
-
External
for
provisioned
from
regenerated
reference
output
DS1
a
generates
DS1
This
NE’s.
both
by
shared
interface
optical
the
reference
synchronization
a
provide
to
used
is
output
BITS.
a
to
Out
Sync
-
External
Mult
-
External