<s>
This	O
creates	O
an	O
optical	O
virtual	B-Application
private	I-Application
network	I-Application
for	O
each	O
client	O
signal	O
.	O
</s>
<s>
ITU-T	O
defines	O
an	O
optical	O
transport	O
network	O
as	O
a	O
set	O
of	O
optical	O
network	O
elements	O
(	O
ONE	O
)	O
connected	O
by	O
optical	B-Architecture
fiber	I-Architecture
links	O
,	O
able	O
to	O
provide	O
functionality	O
of	O
transport	O
,	O
multiplexing	O
,	O
switching	O
,	O
management	O
,	O
supervision	O
and	O
survivability	O
of	O
optical	B-Architecture
channels	I-Architecture
carrying	O
client	O
signals	O
.	O
</s>
<s>
Unless	O
connected	O
by	O
optical	B-Architecture
fibre	I-Architecture
links	O
,	O
it	O
shall	O
not	O
be	O
OTN	O
.	O
</s>
<s>
Mere	O
functionality	O
of	O
switching	O
,	O
management	O
,	O
supervision	O
shall	O
not	O
make	O
it	O
OTN	O
,	O
unless	O
the	O
signals	O
are	O
carried	O
through	O
optical	B-Architecture
fibre	I-Architecture
.	O
</s>
<s>
OTN	O
was	O
designed	O
to	O
provide	O
higher	O
throughput	O
(	O
currently	O
400G	O
)	O
than	O
its	O
predecessor	O
SONET/SDH	B-Protocol
,	O
which	O
stops	O
at	O
40Gbit/s	O
,	O
per	O
channel	O
.	O
</s>
<s>
ITU-T	O
Recommendation	O
G.709	O
is	O
commonly	O
called	O
Optical	O
Transport	O
Network	O
(	O
OTN	O
)	O
(	O
also	O
called	O
digital	O
wrapper	O
technology	O
or	O
optical	B-Architecture
channel	I-Architecture
wrapper	O
)	O
.	O
</s>
<s>
SignalMarketing	O
data	O
Rate	O
(	O
Gbit/s	O
)	O
True	O
Signal	O
rate	O
(	O
OTU	O
)	O
(	O
Gbit/s	O
)	O
Applications	O
Maximum	O
number	O
of	O
signals	O
per	O
channel	O
#	O
of	O
ODU0	O
,	O
1.2G	O
#	O
of	O
ODU1	O
,	O
2.5G	O
#	O
of	O
ODU2	O
,	O
10G	O
#	O
of	O
ODU2e	O
,	O
10.4G	O
#	O
of	O
ODU25	O
,	O
26.4G	O
#	O
of	O
ODU3	O
,	O
40.3G	O
#	O
of	O
ODU50	O
,	O
52.8G	O
#	O
of	O
ODU4	O
,	O
104GOTU12.52.66Transports	O
SONET	B-Protocol
OC-48	O
or	O
synchronous	B-Protocol
digital	I-Protocol
hierarchy	I-Protocol
(	O
SDH	B-Protocol
)	O
STM-16	B-Protocol
signal21000000OTU21010.7Transports	O
an	O
OC-192	O
,	O
STM-64	B-Protocol
or	O
wide	O
area	O
network	O
(	O
WAN	O
)	O
physical	O
layer	O
(	O
PHY	O
)	O
for	O
10	O
Gigabit	O
Ethernet	O
(	O
10GBASE-W	O
)	O
84100000OTU2e10.511.1Transports	O
a	O
10	O
Gigabit	O
Ethernet	O
local	B-General_Concept
area	I-General_Concept
network	I-General_Concept
(	O
LAN	B-General_Concept
)	O
PHY	O
coming	O
from	O
IP/Ethernet	O
switches	O
and	O
routers	O
at	O
full	O
line	O
rate	O
(	O
10.3	O
Gbit/s	O
)	O
.	O
</s>
<s>
This	O
is	O
specified	O
in	O
G.Sup43.84110000OTU252526.4	O
Transports	O
a	O
25	B-Protocol
Gigabit	I-Protocol
Ethernet	I-Protocol
signal2010221000	O
OTU34043Transports	O
an	O
OC-768	O
or	O
STM-256	B-Protocol
signal	O
or	O
a	O
40	B-Protocol
Gigabit	I-Protocol
Ethernet	I-Protocol
signal.OTN	O
offers	O
transparent	O
service	O
delivery	O
,	O
Retrieved	O
June	O
2	O
,	O
20073216431100	O
OTU3e1/24144.5develop	O
for	O
transport	O
of	O
10G	O
LAN	B-General_Concept
PHY	O
,	O
and	O
one	O
for	O
10G	O
WAN	O
PHY	O
,	O
over	O
SDH	B-Protocol
and	O
OTN.3216431100	O
OTU505052.8Transports	O
a	O
50	B-Protocol
Gigabit	I-Protocol
Ethernet	I-Protocol
signal4020552110	O
OTU4100111.8Transports	O
a	O
100	B-Protocol
Gigabit	I-Protocol
Ethernet	I-Protocol
signal804010102221	O
OTUCnn	O
x	O
100n	O
x	O
105.2n	O
instances	O
of	O
a	O
logically	O
interleaved	O
100G	B-Protocol
(	O
C	O
=	O
100	O
)	O
frame	O
format	O
Total	O
bandwidth	O
/	O
ODU	O
size	O
.	O
</s>
<s>
The	O
OTUk	B-Protocol
(	O
k	O
=	O
1/2/2e/3/3e2/4	O
)	O
is	O
an	O
information	O
structure	O
into	O
which	O
another	O
information	O
structure	O
called	O
ODUk	O
(	O
k	O
=	O
1/2/2e/3/3e2/4	O
)	O
is	O
mapped	O
.	O
</s>
<s>
Signal	O
Data	O
Rate	O
(	O
Gbit/s	O
)	O
Typical	O
Applications	O
ODU0	O
1.24416	O
Transport	O
of	O
a	O
timing	O
transparent	O
transcoded	O
(	O
compressed	O
)	O
1000BASE-X	O
signal	O
or	O
a	O
stream	O
of	O
packets	O
(	O
such	O
as	O
Ethernet	O
,	O
MPLS	B-Protocol
or	O
IP	O
)	O
using	O
Generic	B-Protocol
Framing	I-Protocol
Procedure	I-Protocol
ODU1	O
2.49877512605042	O
Transport	O
of	O
two	O
ODU0	O
signals	O
or	O
a	O
STS-48/STM	O
-16	O
signal	O
or	O
a	O
stream	O
of	O
packets	O
(	O
such	O
as	O
Ethernet	O
,	O
MPLS	B-Protocol
or	O
IP	O
)	O
using	O
Generic	B-Protocol
Framing	I-Protocol
Procedure	I-Protocol
.	O
</s>
<s>
At	O
a	O
very	O
high	O
level	O
,	O
the	O
typical	O
signals	O
processed	O
by	O
OTN	O
equipment	O
at	O
the	O
Optical	B-Architecture
Channel	I-Architecture
layer	O
are	O
:	O
</s>
<s>
As	O
a	O
result	O
,	O
the	O
Time-Slot	B-Device
Interchange	I-Device
(	O
TSI	O
)	O
technique	O
of	O
implementing	O
SONET/SDH	B-Protocol
switch	O
fabrics	O
is	O
not	O
directly	O
applicable	O
to	O
OTN	O
switch	O
fabrics	O
.	O
</s>
<s>
On	O
a	O
point-to-point	O
OTN	O
link	O
there	O
is	O
latency	O
due	O
to	O
forward	B-Error_Name
error	I-Error_Name
correction	I-Error_Name
(	O
FEC	O
)	O
processing	O
.	O
</s>
