<s>
The	O
MultiLink	B-Protocol
Procedure	I-Protocol
(	O
MLP	O
)	O
(	O
Subscription-time	O
selectable	O
option	O
)	O
exists	O
as	O
an	O
added	O
upper	O
sublayer	O
of	O
the	O
data	B-Protocol
link	I-Protocol
layer	I-Protocol
,	O
operating	O
between	O
the	O
packet	B-Protocol
layer	O
and	O
a	O
multiplicity	O
of	O
single	O
data	O
link	O
protocol	O
functions	O
(	O
SLPs	O
)	O
in	O
the	O
data	B-Protocol
link	I-Protocol
layer	I-Protocol
.	O
</s>
<s>
A	O
MultiLink	B-Protocol
Procedure	I-Protocol
(	O
MLP	O
)	O
must	O
perform	O
the	O
functions	O
of	O
accepting	O
packets	B-Protocol
from	O
the	O
Packet	B-Protocol
Layer	O
,	O
distributing	O
those	O
packets	B-Protocol
across	O
the	O
available	O
DCE	O
or	O
DTE	O
SLPs	O
for	O
transmission	O
to	O
the	O
DTE	O
or	O
DCE	O
SLPs	O
,	O
respectively	O
,	O
and	O
resequencing	O
the	O
packets	B-Protocol
received	O
from	O
the	O
DTE	O
or	O
DCE	O
SLPs	O
for	O
delivery	O
to	O
the	O
DTE	O
or	O
DCE	O
Packet	B-Protocol
Layer	O
,	O
respectively	O
.	O
</s>
<s>
MLP	O
is	O
an	O
extension	O
of	O
LAPB	B-Protocol
that	O
allows	O
for	O
multiple	O
physical	O
links	O
,	O
thus	O
providing	O
better	O
throughput	O
.	O
</s>
<s>
A	O
device	O
that	O
has	O
multiple	O
LAPB	B-Protocol
links	O
will	O
implement	O
MLP	O
as	O
an	O
upper-layer	O
management	O
protocol	O
to	O
allocate	O
frames	B-Protocol
to	O
the	O
links	O
.	O
</s>
<s>
MLP	O
sees	O
the	O
multiple	O
LAPB	B-Protocol
links	O
as	O
a	O
pool	O
of	O
links	O
for	O
transmitting	O
information	O
from	O
higher-layer	O
protocols	O
as	O
frames	B-Protocol
.	O
</s>
<s>
The	O
MLP	O
layer	O
handles	O
distributing	O
frames	B-Protocol
among	O
the	O
links	O
,	O
and	O
thus	O
gives	O
upper	O
layers	O
full	O
access	O
to	O
the	O
links	O
.	O
</s>
