<s>
Metallic	O
path	O
facility	O
(	O
MPF	O
)	O
are	O
the	O
unshielded	O
twisted	O
pair	O
of	O
copper	O
wires	O
that	O
run	O
from	O
a	O
main	B-Device
distribution	I-Device
frame	I-Device
(	O
MDF	O
)	O
at	O
a	O
local	O
telephone	O
exchange	O
to	O
the	O
customer	O
.	O
</s>
<s>
In	O
this	O
variant	O
,	O
both	O
broadband	B-General_Concept
and	O
voice	O
(	O
baseband	O
)	O
services	O
,	O
together	O
potentially	O
with	O
a	O
video	B-Application
on	I-Application
demand	I-Application
service	O
,	O
are	O
provided	O
to	O
the	O
end	O
user	O
by	O
a	O
single	O
communications	O
provider	O
.	O
</s>
<s>
Shared	O
metallic	O
path	O
facility	O
(	O
SMPF	B-Device
)	O
is	O
based	O
on	O
the	O
same	O
technology	O
as	O
MPF	O
,	O
but	O
denotes	O
a	O
variant	O
whereby	O
an	O
Internet	O
Service	O
Provider	O
(	O
ISP	O
)	O
provides	O
a	O
broadband	B-General_Concept
service	O
to	O
the	O
end	O
user	O
but	O
hands	O
the	O
voice	O
(	O
baseband	O
)	O
service	O
back	O
to	O
the	O
PTT/ILEC	O
.	O
</s>
<s>
With	O
SMPF	B-Device
,	O
the	O
non-incumbent	O
service	O
provider	O
could	O
purchase	O
wholesale	O
the	O
voice	O
service	O
provision	O
from	O
the	O
PTT/ILEC	O
to	O
allow	O
the	O
former	O
to	O
control	O
the	O
customer	O
relationship	O
for	O
both	O
broadband	B-General_Concept
and	O
voice	O
services	O
.	O
</s>
<s>
In	O
the	O
UK	O
at	O
least	O
,	O
this	O
service	O
is	O
called	O
Wholesale	B-Application
Line	I-Application
Rental	I-Application
(	O
WLR	O
)	O
.	O
</s>
<s>
SMPF	B-Device
services	O
are	O
typically	O
delivered	O
through	O
use	O
of	O
a	O
DSLAM	B-Protocol
.	O
</s>
