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3.1
System Management
Flow Chart of LCR
Is the dialled number an
emergency call number?
Route 1 is
selected.
BTL is
selected.
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Is the dialled number the BTL
access code?
Does the first digit match the
leading digit?
No
No
Yes
Does the area code match the
route selection code of Route 1?
No
No
No
No
Does the area code match the
exceptional code of Route 1?
Yes
Yes
Yes
Yes
Route 2 is
selected.
Does the area code match the
route selection code of Route 2?
Does the area code match the
exceptional code of Route 2?
Route 3 is
selected.
Does the area code match the
route selection code of Route 3?
Does the area code match the
exceptional code of Route 3?
Route 4 is
selected.
Does the area code match the
route selection code of Route 4?
Does the area code match the
exceptional code of Route 4?
BTL is selected.
Removing
and Adding
the dialled
number.
Removing
and Adding
the dialled
number.
Removing
and Adding
the dialled
number.
Removing
and Adding
the dialled
number.
Least Cost Routing (LCR)
SLT
✔
ISDN-T
✔
PT
✔
Least Cost Routing (LCR) is a system programmable feature that automatically selects the
least expensive route available at the time a long distance call is made. It is not necessary
to dial the access code of the least expensive carrier.
The chart below shows the procedure of the LCR feature.
Added