<s>
Carrier	B-Device
preselect	I-Device
is	O
a	O
term	O
relating	O
to	O
the	O
telecommunications	O
industry	O
.	O
</s>
<s>
It	O
is	O
a	O
method	O
of	O
routing	O
calls	O
for	O
least-cost	O
routing	O
(	O
LCR	O
)	O
without	O
the	O
need	O
for	O
programming	O
of	O
PBX	B-Device
telephone	O
system	O
.	O
</s>
<s>
This	O
is	O
the	O
process	O
whereby	O
a	O
telephone	O
subscriber	O
whose	O
telephone	O
line	O
is	O
maintained	O
by	O
one	O
company	O
,	O
usually	O
a	O
former	O
monopoly	B-Application
provider	O
(	O
e.g.	O
</s>
