<s>
Yahoo	B-Protocol
Voice	I-Protocol
was	O
a	O
Voice	B-Application
over	I-Application
Internet	I-Application
Protocol	I-Application
(	O
VoIP	B-Application
)	O
,	O
PC-PC	O
,	O
PC-Phone	O
and	O
Phone-to-PC	O
telecommunications	O
service	O
.	O
</s>
<s>
It	O
was	O
provided	O
by	O
Yahoo	B-Application
via	O
its	O
Yahoo	B-Application
Messenger	I-Application
instant	B-Application
messaging	I-Application
application	O
.	O
</s>
<s>
Yahoo	B-Protocol
Voice	I-Protocol
used	O
the	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
(	O
SIP	B-Application
)	O
,	O
GIPS	B-Algorithm
codec	I-Algorithm
and	O
the	O
Dialpad	O
engine	O
for	O
voice	O
transport	O
.	O
</s>
<s>
After	O
2008	O
the	O
service	O
was	O
provided	O
by	O
JAJAH	O
,	O
an	O
external	O
VoIP	B-Application
provider	O
.	O
</s>
<s>
In	O
July	O
2012	O
,	O
Yahoo	B-Protocol
Voice	I-Protocol
was	O
compromised	O
and	O
453,491	O
email	O
addresses	O
and	O
passwords	O
were	O
stolen	O
using	O
SQL	B-Language
injection	I-Language
.	O
</s>
<s>
Yahoo	B-Application
announced	O
the	O
end	O
of	O
Yahoo	B-Protocol
Voice	I-Protocol
on	O
January	O
30	O
,	O
2013	O
.	O
</s>
<s>
PC-to-Phone	O
calls	O
to	O
landlines	B-Application
and	O
mobile	O
phones	O
was	O
provided	O
via	O
the	O
Yahoo	B-Protocol
Phone	I-Protocol
Out	I-Protocol
service	O
.	O
</s>
<s>
Phone-to-PC	O
calls	O
can	O
be	O
received	O
from	O
landline	B-Application
or	O
mobile	O
phones	O
.	O
</s>
<s>
With	O
Yahoo	B-Protocol
Phone	I-Protocol
In	I-Protocol
users	O
could	O
choose	O
a	O
phone	O
number	O
from	O
three	O
countries	O
(	O
US	O
,	O
UK	O
and	O
France	O
)	O
.	O
</s>
