<s>
In	O
telecommunication	O
,	O
a	O
Hagelbarger	B-Error_Name
code	I-Error_Name
is	O
a	O
convolutional	B-Error_Name
code	I-Error_Name
that	O
enables	O
error	O
bursts	O
to	O
be	O
corrected	O
provided	O
that	O
there	O
are	O
relatively	O
long	O
error-free	O
intervals	O
between	O
the	O
error	O
bursts	O
.	O
</s>
<s>
In	O
the	O
Hagelbarger	B-Error_Name
code	I-Error_Name
,	O
inserted	O
parity	O
check	O
bits	O
are	O
spread	O
out	O
in	O
time	O
so	O
that	O
an	O
error	O
burst	O
is	O
not	O
likely	O
to	O
affect	O
more	O
than	O
one	O
of	O
the	O
groups	O
in	O
which	O
parity	O
is	O
checked	O
.	O
</s>
