<s>
In	O
telecommunication	O
,	O
an	O
enhanced-non-return-to-zero-level	O
(	O
E-NRZ-L	B-Protocol
)	O
line	B-Protocol
code	I-Protocol
is	O
a	O
binary	O
code	O
in	O
which	O
1s	O
are	O
represented	O
as	O
low	O
level	O
and	O
0s	O
are	O
represented	O
as	O
high	O
level	O
condition	O
with	O
no	O
other	O
neutral	O
or	O
rest	O
condition	O
,	O
similar	O
to	O
Non-return-to-zero	B-Protocol
;	O
However	O
,	O
the	O
major	O
enhancement	O
over	O
NRZ	O
is	O
the	O
addition	O
of	O
a	O
parity	B-Error_Name
bit	I-Error_Name
(	O
usually	O
odd	B-Error_Name
parity	I-Error_Name
)	O
to	O
the	O
end	O
of	O
the	O
bit	O
stream	O
.	O
</s>
