<s>
The	O
AirPort	B-Device
Time	I-Device
Capsule	I-Device
(	O
originally	O
named	O
Time	B-Device
Capsule	I-Device
)	O
is	O
a	O
wireless	B-Device
router	I-Device
which	O
was	O
sold	O
by	O
Apple	O
Inc.	O
,	O
featuring	O
network-attached	B-Application
storage	I-Application
(	O
NAS	B-Application
)	O
and	O
a	O
residential	B-Application
gateway	I-Application
router	I-Application
,	O
and	O
is	O
one	O
of	O
Apple	O
's	O
AirPort	O
products	O
.	O
</s>
<s>
They	O
are	O
,	O
essentially	O
,	O
versions	O
of	O
the	O
AirPort	B-Device
Extreme	I-Device
with	O
an	O
internal	B-Device
hard	I-Device
drive	I-Device
.	O
</s>
<s>
Apple	O
describes	O
it	O
as	O
a	O
"	O
Backup	B-Protocol
Appliance	O
"	O
,	O
designed	O
to	O
work	O
in	O
tandem	O
with	O
the	O
Time	B-Operating_System
Machine	I-Operating_System
backup	B-Protocol
software	O
utility	O
introduced	O
in	O
Mac	O
OS	O
X	O
10.5	O
.	O
</s>
<s>
The	O
earliest	O
versions	O
supported	O
802.11n	O
wireless	O
and	O
came	O
with	O
a	O
500	O
GB	O
hard	B-Device
drive	I-Device
in	O
the	O
base	O
model	O
,	O
while	O
the	O
latest	O
model	O
,	O
introduced	O
in	O
2013	O
,	O
features	O
802.11ac	O
and	O
a	O
3	O
TB	O
hard	B-Device
drive	I-Device
.	O
</s>
<s>
All	O
models	O
include	O
four	O
Gigabit	O
Ethernet	O
ports	O
(	O
3	O
LAN	O
ports	O
,	O
1	O
WAN	O
port	O
)	O
and	O
a	O
single	O
USB	B-Protocol
port	O
.	O
</s>
<s>
The	O
USB	B-Protocol
port	O
can	O
be	O
used	O
for	O
external	O
peripheral	O
devices	O
to	O
be	O
shared	O
over	O
the	O
network	O
,	O
such	O
as	O
external	O
hard	B-Device
drives	I-Device
or	O
printers	O
.	O
</s>
<s>
The	O
NAS	B-Application
functionality	O
utilizes	O
a	O
built-in	O
"	O
server	O
grade	O
"	O
hard	B-Device
drive	I-Device
.	O
</s>
<s>
In	O
2016	O
,	O
Apple	O
disbanded	O
its	O
wireless	B-Device
router	I-Device
development	O
team	O
,	O
and	O
in	O
2018	O
the	O
entire	O
AirPort	O
line	O
of	O
products	O
was	O
discontinued	O
without	O
replacement	O
.	O
</s>
<s>
In	O
early	O
2009	O
,	O
Apple	O
released	O
the	O
second	O
generation	O
Time	B-Device
Capsule	I-Device
.	O
</s>
<s>
The	O
hard	B-Device
disk	I-Device
storage	I-Device
space	O
of	O
each	O
model	O
was	O
doubled	O
:	O
capacities	O
were	O
1TB	O
2TB	O
,	O
while	O
the	O
prices	O
remained	O
unchanged	O
.	O
</s>
<s>
In	O
October	O
2009	O
,	O
several	O
news	O
sites	O
reported	O
that	O
many	O
first	O
generation	O
Time	B-Device
Capsules	I-Device
were	O
failing	O
after	O
18	O
months	O
,	O
with	O
some	O
users	O
alleging	O
that	O
this	O
was	O
due	O
to	O
a	O
design	O
failure	O
in	O
the	O
power	O
supplies	O
.	O
</s>
<s>
Apple	O
confirmed	O
that	O
certain	O
Time	B-Device
Capsules	I-Device
sold	O
between	O
February	O
2008	O
and	O
June	O
2008	O
do	O
not	O
power	O
on	O
,	O
or	O
may	O
unexpectedly	O
turn	O
off	O
.	O
</s>
<s>
The	O
third	O
generation	O
Time	B-Device
Capsule	I-Device
was	O
released	O
in	O
October	O
2009	O
.	O
</s>
<s>
The	O
fourth	O
generation	O
Time	B-Device
Capsule	I-Device
,	O
released	O
in	O
June	O
2011	O
,	O
increased	O
the	O
range	O
of	O
Wi-Fi	O
signals	O
.	O
</s>
<s>
In	O
approximately	O
2016	O
,	O
Apple	O
disbanded	O
the	O
wireless	B-Device
router	I-Device
team	O
that	O
developed	O
the	O
AirPort	B-Device
Time	I-Device
Capsule	I-Device
and	O
AirPort	B-Device
Extreme	I-Device
router	I-Device
.	O
</s>
<s>
Bloomberg	O
News	O
noted	O
that	O
"	O
Apple	O
rarely	O
discontinues	O
product	O
categories	O
"	O
and	O
that	O
its	O
decision	O
to	O
leave	O
the	O
business	O
was	O
"	O
a	O
boon	O
for	O
other	O
wireless	B-Device
router	I-Device
makers.	O
"	O
</s>
<s>
The	O
fifth	O
generation	O
Time	B-Device
Capsule	I-Device
includes	O
a	O
fully	O
featured	O
,	O
802.11ac	O
,	O
Wi-Fi	O
access	O
point	O
including	O
simultaneous	O
dual-band	O
operation	O
.	O
</s>
<s>
The	O
Time	B-Device
Capsule	I-Device
supports	O
the	O
Sleep	B-Protocol
Proxy	I-Protocol
Service	I-Protocol
.	O
</s>
<s>
The	O
Time	B-Device
Capsule	I-Device
up	O
to	O
the	O
fourth	O
generation	O
runs	O
on	O
the	O
ARM	B-Architecture
port	I-Architecture
of	O
operating	O
system	O
NetBSD	B-Device
4.0	O
,	O
while	O
the	O
fifth	O
generation	O
model	O
runs	O
NetBSD	B-Device
6	O
.	O
</s>
<s>
One	O
of	O
the	O
key	O
features	O
of	O
Time	B-Device
Capsule	I-Device
is	O
the	O
ability	O
to	O
back	B-Protocol
up	I-Protocol
a	O
system	O
and	O
files	O
wirelessly	O
and	O
automatically	O
,	O
eliminating	O
the	O
need	O
to	O
attach	O
an	O
external	O
backup	B-Protocol
drive	O
.	O
</s>
<s>
The	O
backup	B-Protocol
software	O
is	O
Apple	O
's	O
Time	B-Operating_System
Machine	I-Operating_System
,	O
which	O
,	O
by	O
default	O
,	O
makes	O
hourly	O
images	O
of	O
the	O
files	O
that	O
are	O
being	O
changed	O
,	O
and	O
condenses	O
backup	B-Protocol
images	O
as	O
they	O
become	O
older	O
,	O
to	O
save	O
space	O
.	O
</s>
<s>
Even	O
when	O
using	O
an	O
802.11n	O
wireless	O
or	O
Gigabit	O
Ethernet	O
connection	O
,	O
the	O
initial	O
backup	B-Protocol
of	O
any	O
Mac	O
to	O
the	O
drive	O
requires	O
significant	O
time	O
;	O
Apple	O
suggests	O
that	O
the	O
initial	O
backup	B-Protocol
will	O
require	O
"	O
several	O
hours	O
or	O
overnight	O
to	O
complete	O
"	O
.	O
</s>
<s>
The	O
hard	B-Device
drive	I-Device
typically	O
found	O
in	O
a	O
Time	B-Device
Capsule	I-Device
is	O
the	O
Hitachi	B-Device
Deskstar	I-Device
,	O
which	O
is	O
sold	O
by	O
Hitachi	O
as	O
a	O
consumer-grade	O
product	O
—	O
the	O
Hitachi	O
Ultrastar	O
is	O
the	O
enterprise	O
version	O
.	O
</s>
<s>
Apple	O
labeled	O
the	O
drive	O
as	O
a	O
server-grade	O
drive	O
in	O
promotional	O
material	O
for	O
Time	B-Device
Capsule	I-Device
,	O
and	O
also	O
used	O
this	O
type	O
of	O
drive	O
in	O
its	O
discontinued	O
Xserve	B-Device
servers	O
.	O
</s>
<s>
Apple	O
states	O
that	O
the	O
Hitachi	B-Device
Deskstar	I-Device
meets	O
or	O
exceeds	O
the	O
1	O
million	O
hours	O
mean	O
time	O
between	O
failures	O
(	O
MTBF	O
)	O
recommendation	O
for	O
server-grade	O
hard	B-Device
drives	I-Device
.	O
</s>
<s>
The	O
500GB	O
,	O
first	O
generation	O
Time	B-Device
Capsule	I-Device
shipped	O
with	O
a	O
Seagate	O
Barracuda	O
ES-series	O
drive	O
;	O
or	O
subsequently	O
,	O
other	O
hard	B-Device
drives	I-Device
such	O
as	O
the	O
Western	O
Digital	O
Caviar	O
Green	O
series	O
.	O
</s>
<s>
The	O
Time	B-Device
Capsules	I-Device
up	O
to	O
the	O
4th	O
generation	O
measure	O
square	O
,	O
and	O
high	O
.	O
</s>
<s>
The	O
June	O
2013	O
release	O
of	O
the	O
5th	O
generation	O
models	O
features	O
a	O
name	O
change	O
to	O
AirPort	B-Device
Time	I-Device
Capsule	I-Device
,	O
and	O
a	O
redesign	O
with	O
measurements	O
square	O
,	O
and	O
high	O
.	O
</s>
<s>
The	O
square	O
dimensions	O
echo	O
the	O
size	O
of	O
both	O
the	O
latest	O
AirPort	O
Express	O
and	O
Apple	B-Device
TVs	I-Device
(	O
2nd	O
generation	O
onwards	O
)	O
,	O
just	O
with	O
the	O
height	O
being	O
significantly	O
higher	O
.	O
</s>
<s>
The	O
AirPort	B-Device
Extreme	I-Device
released	O
at	O
the	O
same	O
time	O
is	O
exactly	O
the	O
same	O
in	O
dimensions	O
and	O
I/O	O
ports	O
,	O
just	O
without	O
the	O
internal	O
harddrive	B-Device
of	O
the	O
AirPort	B-Device
Time	I-Device
Capsule	I-Device
.	O
</s>
<s>
2013	O
models	O
feature	O
faster	O
download	O
speed	O
,	O
beamforming	B-Algorithm
improvements	O
and	O
wireless	O
or	O
desktop	O
network	O
control	O
with	O
iCloud	O
integration	O
.	O
</s>
<s>
Also	O
improved	O
,	O
Airport	O
Utility	O
has	O
added	O
one	O
click	O
Time	B-Device
Capsule	I-Device
format	O
from	O
the	O
utility	O
's	O
Airport	B-Device
Time	I-Device
Capsule	I-Device
,	O
Edit	O
,	O
Disks	O
menu	O
,	O
allowing	O
easy	O
and	O
rapid	O
Erase	O
Disk	O
and	O
Archive	O
Disk	O
to	O
start	O
over	O
or	O
configure	O
Network	O
.	O
</s>
