<s>
Multi-rate	O
symmetric	O
DSL	O
(	O
MSDSL	B-Protocol
or	O
MDSL	O
)	O
is	O
a	O
proprietary	O
,	O
non-standardized	O
symmetric	O
digital	O
subscriber	O
line	O
technology	O
with	O
a	O
maximum	O
distance	O
of	O
.	O
</s>
<s>
MSDSL	B-Protocol
uses	O
either	O
2B1Q	B-Protocol
or	O
carrierless	B-Device
amplitude	I-Device
phase	I-Device
modulation	I-Device
(	O
CAP	O
)	O
transmission	O
with	O
a	O
capacity	O
of	O
up	O
to	O
2.32	O
Mbit/s	O
.	O
</s>
<s>
The	O
bandwidth	O
is	O
generally	O
split	O
between	O
a	O
full	O
E-carrier	O
E1	O
payload	O
(	O
2.048	O
Mbit/s	O
)	O
,	O
with	O
the	O
remaining	O
bandwidth	O
accommodating	O
up	O
to	O
three	O
voice	O
channels	O
or	O
two	O
ISDN	B-Protocol
channels	O
.	O
</s>
<s>
For	O
each	O
user	O
rate	O
,	O
the	O
modem	O
changes	O
the	O
2B1Q	B-Protocol
or	O
CAP	O
transmission	O
rate	O
,	O
employing	O
different	O
filters	O
and	O
equalizer	O
settings	O
.	O
</s>
