<s>
IP	O
over	O
DWDM	O
(	O
IPoDWDM	B-Protocol
)	O
is	O
a	O
technology	O
used	O
in	O
telecommunications	O
networks	O
to	O
integrate	O
IP	B-Protocol
routers	I-Protocol
and	O
network	B-Protocol
switches	I-Protocol
in	O
the	O
OTN	O
(	O
Optical	B-Protocol
Transport	I-Protocol
Network	I-Protocol
)	O
.	O
</s>
<s>
A	O
true	O
IPoDWDM	B-Protocol
solution	O
is	O
implemented	O
only	O
when	O
the	O
IP	B-Protocol
Routers	I-Protocol
and	O
Switches	O
support	O
ITU-T	O
G.709	O
.	O
</s>
<s>
In	O
this	O
way	O
IP	O
devices	O
can	O
monitor	O
the	O
optical	O
path	O
and	O
implement	O
the	O
transport	O
functionality	O
as	O
FEC	O
(	O
Forward	B-Error_Name
Error	I-Error_Name
Correction	I-Error_Name
)	O
specified	O
by	O
ITU-T	O
G.709/Y.1331	O
or	O
Super	O
FEC	O
functionality	O
defined	O
in	O
ITU-T	O
G.975.1	O
.	O
</s>
<s>
This	O
approach	O
brings	O
also	O
a	O
simplification	O
of	O
the	O
network	O
,	O
eliminating	O
the	O
SDH/SONET	B-Protocol
intermediate	O
layer	O
.	O
</s>
<s>
A	O
DWDM	O
network	O
can	O
be	O
implemented	O
using	O
different	O
vendor	O
technology	O
from	O
the	O
IP	O
devices	O
as	O
long	O
as	O
they	O
support	O
alien	B-Protocol
wavelength	I-Protocol
transmission	I-Protocol
specified	O
by	O
ITU-T	O
G.698.2	O
.	O
</s>
