<s>
A	O
Network	B-Device
Termination	I-Device
Device	I-Device
(	O
NTD	B-Device
)	O
is	O
a	O
customer-side	O
network	B-Protocol
interface	I-Protocol
device	I-Protocol
used	O
by	O
the	O
Australian	O
National	O
Broadband	O
Network	O
(	O
NBN	O
)	O
.	O
</s>
<s>
Network	B-Device
termination	I-Device
devices	I-Device
provide	O
multiple	O
bridges	B-Protocol
for	O
customers	O
to	O
access	O
the	O
NBN	O
.	O
</s>
<s>
There	O
are	O
different	O
types	O
of	O
NTDs	B-Device
for	O
the	O
various	O
connection	O
technologies	O
encompassed	O
by	O
NBN	O
.	O
</s>
<s>
All	O
connection	O
types	O
except	O
FTTN	O
use	O
NTDs	B-Device
on	O
premises	O
.	O
</s>
<s>
Depending	O
on	O
the	O
kind	O
of	O
link	O
,	O
NTDs	B-Device
typically	O
provide	O
two	O
telephony	O
and	O
four	O
data	O
channels	O
.	O
</s>
<s>
An	O
external	O
power	O
source	O
is	O
required	O
,	O
and	O
an	O
uninterruptible	O
power	O
supply	O
(	O
UPS	O
)	O
can	O
be	O
used	O
to	O
maintain	O
connection	O
in	O
power	O
outages	O
(	O
battery	O
backups	O
are	O
available	O
for	O
the	O
FTTP	O
NTD	B-Device
)	O
.	O
</s>
<s>
NTDs	B-Device
provide	O
user	O
–	O
network	O
interface	O
(	O
UNI	O
)	O
connections	O
for	O
connection	O
of	O
in-premises	O
devices	O
.	O
</s>
<s>
All	O
NTDs	B-Device
are	O
capable	O
of	O
passing	O
VoIP	B-Application
traffic	O
.	O
</s>
<s>
The	O
NTD	B-Device
cannot	O
be	O
used	O
as	O
a	O
Layer	B-Application
3	I-Application
router	O
for	O
in-premises	O
networking	O
.	O
</s>
<s>
+	O
Comparison	O
of	O
NTDs	B-Device
for	O
different	O
network	O
technologies	O
Technology	O
Model	O
Upstream	O
protocol	O
UNI-V	O
jacks	O
UNI-D	O
jacks	O
Alternative	O
names	O
Notes	O
FTTP	O
Alcatel-Lucent	O
GPON	B-Architecture
2	O
4	O
FTTB/N	O
None	O
(	O
end-user	O
modem	O
)	O
VDSL2	O
0	O
0	O
VDSL2	O
modem	O
The	O
UNI	O
for	O
a	O
FTTB/N	O
service	O
is	O
a	O
copper	O
pair	O
termination	O
in	O
the	O
premises	O
(	O
at	O
at	O
the	O
building	O
MDF	O
)	O
carrying	O
a	O
VDSL2	O
signal	O
.	O
</s>
<s>
The	O
DPU	O
is	O
an	O
Adtran	O
504VG	O
powered	O
from	O
the	O
mains-powered	O
NDD-0300	O
NTDs	B-Device
installed	O
for	O
each	O
NBN	O
connection	O
within	O
the	O
premises	O
served	O
(	O
the	O
NTD	B-Device
provides	O
60VDC	O
to	O
deliver	O
48VDC	O
at	O
the	O
DPU	O
,	O
allowing	O
for	O
line	O
resistance	O
)	O
.	O
</s>
<s>
HFC	O
Arris	O
CM8200(B )	O
DOCSIS	B-Protocol
3.0	I-Protocol
0	O
2	O
Cable	O
modem	O
Only	O
one	O
UNI-D	O
port	O
(	O
UNI-D	O
1	O
)	O
is	O
supported	O
for	O
use	O
.	O
</s>
