<s>
Fritz	B-Application
!	I-Application
Box	I-Application
,	O
stylised	O
as	O
FRITZ	B-Application
!	I-Application
Box	I-Application
,	O
is	O
a	O
series	O
of	O
residential	B-Application
gateway	I-Application
devices	O
produced	O
by	O
the	O
German	O
company	O
AVM	O
GmbH	O
.	O
</s>
<s>
Typical	O
functionality	O
of	O
a	O
Fritz	B-Application
!	I-Application
Box	I-Application
includes	O
:	O
</s>
<s>
a	O
built-in	O
broadband	B-General_Concept
modem	I-General_Concept
:	O
</s>
<s>
in	O
nearly	O
all	O
models	O
,	O
a	O
wireless	B-Device
access	I-Device
point	I-Device
:	O
</s>
<s>
a	O
PBX	B-Device
,	O
particularly	O
in	O
the	O
7xxx	O
series	O
models	O
:	O
</s>
<s>
in	O
most	O
models	O
since	O
2006	O
,	O
a	O
USB	B-Protocol
port	I-Protocol
to	O
connect	O
external	O
storage	O
or	O
printer	O
which	O
may	O
also	O
be	O
used	O
to	O
connect	O
a	O
e.g.	O
</s>
<s>
Many	O
Fritz	B-Application
!	I-Application
Boxes	I-Application
offer	O
wireless	B-Device
repeater	I-Device
functionality	O
which	O
,	O
in	O
earlier	O
firmware	O
versions	O
,	O
was	O
compatible	O
with	O
the	O
IEEE	O
802.11-1999	O
standard	O
wireless	B-General_Concept
distribution	I-General_Concept
system	I-General_Concept
before	O
being	O
replaced	O
with	O
a	O
proprietary	O
system	O
in	O
more	O
recent	O
firmware	O
versions	O
.	O
</s>
<s>
IPv6	B-Protocol
support	O
was	O
enabled	O
from	O
firmware	O
version	O
4.90	O
onwards	O
.	O
</s>
<s>
Fritz	B-Application
!	I-Application
Box	I-Application
devices	O
operate	O
under	O
the	O
control	O
of	O
Fritz	B-Application
!	I-Application
OS	I-Application
,	O
a	O
specialized	O
Linux	B-Application
distribution	O
,	O
which	O
provides	O
a	O
graphical	O
web	O
interface	O
for	O
user	O
interaction	O
.	O
</s>
<s>
Fritz	B-Application
!	I-Application
Box	I-Application
devices	O
with	O
an	O
integrated	O
DSL	B-Device
modem	I-Device
come	O
in	O
three	O
versions	O
.	O
</s>
<s>
The	O
version	O
for	O
the	O
German	O
market	O
uses	O
an	O
ISDN	B-Protocol
interface	O
for	O
voice	O
.	O
</s>
<s>
For	O
the	O
Austrian	O
and	O
Swiss	B-Protocol
markets	O
the	O
voice	O
interface	O
use	O
traditional	O
POTS	O
and	O
also	O
has	O
a	O
German-language	O
user	O
interface	O
.	O
</s>
<s>
The	O
international	O
version	O
has	O
a	O
multi-language	O
web	O
interface	O
and	O
provides	O
support	O
for	O
POTS	O
and	O
usually	O
ISDN	B-Protocol
for	O
voice	O
.	O
</s>
<s>
While	O
the	O
international	O
version	O
supports	O
both	O
the	O
most	O
common	O
ADSL	O
Annex	O
A	O
POTS	O
and	O
ADSL	O
Annex	O
B	O
ISDN	B-Protocol
,	O
the	O
German	O
version	O
offers	O
hardware	O
support	O
for	O
Annex	O
B	O
only	O
,	O
which	O
is	O
the	O
sole	O
standard	O
used	O
in	O
Germany	O
,	O
with	O
additional	O
support	O
for	O
Annex	O
J	O
in	O
newer	O
models	O
.	O
</s>
