<s>
Gizmo5	B-Application
(	O
formerly	O
known	O
as	O
Gizmo	B-Application
Project	I-Application
and	O
SIPphone	B-Application
)	O
was	O
a	O
voice	B-Application
over	I-Application
IP	I-Application
communications	O
network	O
and	O
a	O
proprietary	B-License
freeware	I-License
soft	B-Protocol
phone	I-Protocol
for	O
that	O
network	O
.	O
</s>
<s>
On	O
November	O
12	O
,	O
2009	O
,	O
Google	B-Application
announced	O
that	O
it	O
had	O
acquired	O
Gizmo5	B-Application
.	O
</s>
<s>
On	O
March	O
4	O
,	O
2011	O
,	O
Google	B-Application
announced	O
that	O
the	O
service	O
would	O
be	O
discontinued	O
as	O
of	O
April	O
3	O
,	O
2011	O
.	O
</s>
<s>
The	O
Gizmo5	B-Application
network	O
used	O
open	O
standards	O
for	O
call	O
management	O
,	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
(	O
SIP	B-Application
)	O
and	O
Extensible	B-Protocol
Messaging	I-Protocol
and	I-Protocol
Presence	I-Protocol
Protocol	I-Protocol
(	O
XMPP	B-Protocol
)	O
.	O
</s>
<s>
However	O
,	O
the	O
Gizmo5	B-Application
client	O
application	O
was	O
proprietary	B-Application
software	I-Application
and	O
used	O
several	O
proprietary	B-Application
codecs	B-General_Concept
,	O
including	O
GIPS	B-Application
and	O
Internet	B-Algorithm
Speech	I-Algorithm
Audio	I-Algorithm
Codec	I-Algorithm
(	O
iSAC	B-Algorithm
)	O
.	O
</s>
<s>
Gizmo	B-Application
Project	I-Application
was	O
founded	O
by	O
Michael	O
Robertson	O
and	O
his	O
company	O
SIPphone	B-Application
.	O
</s>
<s>
On	O
November	O
12	O
,	O
2009	O
,	O
Google	B-Application
announced	O
that	O
it	O
had	O
acquired	O
Gizmo5	B-Application
for	O
a	O
reported	O
$30	O
million	O
in	O
cash	O
.	O
</s>
<s>
Prior	O
to	O
this	O
acquisition	O
,	O
Gizmo5	B-Application
had	O
a	O
working	O
relationship	O
with	O
GrandCentral	B-Application
(	O
now	O
Google	B-Application
Voice	I-Application
)	O
for	O
years	O
.	O
</s>
<s>
Upon	O
announcement	O
,	O
Gizmo5	B-Application
suspended	O
new	O
signups	O
until	O
a	O
Google	B-Application
relaunch	O
.	O
</s>
<s>
Google	B-Application
was	O
also	O
dogfooding	O
a	O
Google	B-Application
Voice	I-Application
desktop	O
client	O
based	O
on	O
Gizmo5	B-Application
,	O
branded	O
as	O
Gizmo5	B-Application
by	O
Google	B-Application
.	I-Application
</s>
<s>
On	O
April	O
3	O
,	O
2011	O
,	O
Google	B-Application
shut	O
down	O
Gizmo5	B-Application
and	O
recommended	O
users	O
to	O
use	O
Google	B-Application
Talk	I-Application
instead	O
.	O
</s>
<s>
Gizmo5	B-Application
was	O
based	O
on	O
the	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
and	O
could	O
interoperate	O
with	O
other	O
SIP-based	O
networks	O
directly	O
,	O
including	O
the	O
public	O
switched	O
telephone	O
network	O
.	O
</s>
<s>
The	O
latter	O
required	O
the	O
Gizmo5	B-Application
service	O
features	O
CallOut	O
and	O
CallIn	O
.	O
</s>
<s>
CallOut	O
was	O
available	O
at	O
a	O
fee	O
,	O
whereas	O
CallIn	O
and	O
calls	O
to	O
other	O
VoIP	B-Application
users	O
were	O
generally	O
free	O
of	O
cost	O
.	O
</s>
<s>
Gizmo5	B-Application
also	O
used	O
encryption	O
(	O
Secure	B-Protocol
Real-time	I-Protocol
Transport	I-Protocol
Protocol	I-Protocol
)	O
for	O
network	O
calls	O
and	O
worked	O
well	O
with	O
Phil	O
Zimmermann	O
's	O
Zfone	B-Application
security	O
features	O
.	O
</s>
<s>
Gizmo5	B-Application
supported	O
the	O
following	O
Codecs	B-General_Concept
:	O
</s>
<s>
Version	O
4.0	O
of	O
the	O
Gizmo5	B-Application
softphone	B-Protocol
offered	O
video	O
calls	O
.	O
</s>
<s>
Gizmo5	B-Application
also	O
offered	O
smartphone	O
version	O
.	O
</s>
<s>
As	O
of	O
July	O
20	O
,	O
2009	O
,	O
Gizmo5	B-Application
was	O
the	O
only	O
SIP	B-Application
service	O
that	O
could	O
be	O
used	O
with	O
Google	B-Application
Voice	I-Application
directly	O
(	O
without	O
requiring	O
a	O
U.S.	O
based	O
phone	O
number	O
)	O
.	O
</s>
<s>
The	O
text	O
chat	O
function	O
of	O
Gizmo5	B-Application
utilized	O
the	O
Extensible	B-Protocol
Messaging	I-Protocol
and	I-Protocol
Presence	I-Protocol
Protocol	I-Protocol
(	O
XMPP	B-Protocol
)	O
protocol	O
.	O
</s>
<s>
An	O
earlier	O
incarnation	O
of	O
the	O
service	O
was	O
,	O
a	O
free	B-Application
software	I-Application
VoIP	B-Application
system	O
based	O
on	O
the	O
Pidgin	B-Protocol
instant	O
messaging	O
software	O
and	O
the	O
SIP	B-Application
protocol	O
handling	O
of	O
the	O
Linphone	B-Protocol
VoIP	B-Application
software	O
,	O
but	O
restricted	O
to	O
using	O
(	O
only	O
)	O
the	O
SIPphone	B-Application
service	O
.	O
</s>
<s>
It	O
is	O
available	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
and	O
sponsored	O
by	O
Linspire	O
.	O
</s>
<s>
Gizmo5	B-Application
supported	O
outbound	O
caller	O
line	O
identification	O
in	O
the	O
United	O
States	O
.	O
</s>
<s>
Gizmo5	B-Application
provided	O
a	O
free	O
voicemail	O
service	O
.	O
</s>
<s>
Gizmo5	B-Application
allowed	O
paying	O
subscribers	O
of	O
LiveJournal	B-Application
to	O
place	O
voiceposts	O
if	O
they	O
are	O
unable	O
to	O
use	O
the	O
voicepost	O
telephone	O
lines	O
provided	O
by	O
the	O
website	O
.	O
</s>
<s>
The	O
Gizmo5	B-Application
mobile	O
phone	O
application	O
used	O
the	O
phone	O
's	O
carrier	O
voice	O
network	O
for	O
all	O
calls	O
.	O
</s>
<s>
On	O
mobile	O
phones	O
that	O
support	O
SIP	B-Application
applications	O
,	O
calls	O
may	O
be	O
placed	O
over	O
WiFi	O
or	O
3G	O
.	O
</s>
<s>
In	O
the	O
case	O
of	O
WiFi	O
,	O
calls	O
to	O
Gizmo5	B-Application
users	O
were	O
free	O
,	O
and	O
calls	O
to	O
the	O
public	O
switched	O
telephone	O
network	O
were	O
charged	O
Gizmo5	B-Application
Call	O
Out	O
credit	O
.	O
</s>
<s>
On	O
August	O
26	O
,	O
2010	O
,	O
Gmail	O
accounts	O
with	O
Google	B-Application
voice	I-Application
were	O
given	O
a	O
function	O
to	O
make	O
and	O
receive	O
calls	O
.	O
</s>
<s>
Google	B-Application
Voice	I-Application
product	O
manager	O
,	O
Vincent	O
Paquet	O
,	O
confirmed	O
that	O
this	O
function	O
was	O
added	O
through	O
the	O
help	O
of	O
the	O
technology	O
received	O
after	O
the	O
Gizmo5	B-Application
acquisition	O
.	O
</s>
<s>
On	O
Fri	O
,	O
Mar	O
4	O
,	O
2011	O
,	O
subscribers	O
received	O
the	O
following	O
message	O
from	O
Gizmo5	B-Application
,	O
indicating	O
that	O
the	O
service	O
would	O
be	O
terminated	O
.	O
</s>
<s>
"	O
Gizmo5	B-Application
is	O
writing	O
to	O
let	O
you	O
know	O
that	O
we	O
will	O
no	O
longer	O
be	O
providing	O
service	O
starting	O
on	O
April	O
3	O
,	O
2011	O
.	O
</s>
<s>
Although	O
the	O
standalone	O
Gizmo5	B-Application
client	O
will	O
no	O
longer	O
be	O
available	O
,	O
we	O
have	O
since	O
launched	O
the	O
ability	O
to	O
call	O
phones	O
from	O
within	O
Gmail	O
at	O
even	O
more	O
affordable	O
rates	O
.	O
</s>
<s>
If	O
you	O
purchased	O
calling	O
credit	O
and	O
have	O
a	O
balance	O
remaining	O
in	O
your	O
account	O
,	O
you	O
can	O
request	O
a	O
refund	O
by	O
logging	O
into	O
http://my.gizmo5.com	O
.	O
</s>
<s>
If	O
you	O
are	O
in	O
the	O
United	O
States	O
,	O
you	O
can	O
instead	O
choose	O
to	O
transfer	O
your	O
credit	O
to	O
a	O
Google	B-Application
Voice	I-Application
account	O
,	O
so	O
it	O
can	O
be	O
used	O
for	O
calling	O
from	O
Google	B-Application
Voice	I-Application
or	O
Gmail	O
.	O
</s>
<s>
If	O
you	O
do	O
n’t	O
have	O
a	O
Google	B-Application
Voice	I-Application
account	O
,	O
please	O
create	O
one	O
so	O
that	O
we	O
can	O
transfer	O
your	O
credit	O
.	O
</s>
<s>
There	O
was	O
no	O
indication	O
made	O
if	O
the	O
service	O
would	O
be	O
revived	O
in	O
another	O
form	O
,	O
or	O
if	O
there	O
would	O
be	O
similar	O
functionality	O
added	O
to	O
any	O
of	O
Google	B-Application
's	I-Application
current	O
telephony	O
offerings	O
.	O
</s>
