Start
Station user dials trunk
group access codes
LCR type
selected?
System finds the cheapest
trunk from the group depending
upon the time on which call
System allots a free trunk
from the TAG depending
upon the rotation flag
A
System allots free trunk from
the trunk access group as per
number logic and rotation logic
Is the cheapest
trunk free?
Are other trunk
available in this
group?
Select next cheaper
trunk in this group
System allots the
trunk to the station
End
System gives busy
tone to the station
System waits for next
action from the user
End
End
System waits for dialing
of entire number
System finds cheapest
trunk for this number
Is the cheapest
trunk free?
System dials out the number
End
Select next cheap
trunk in the group
Is the cheapest
trunk free?
Time Based LCR
Yes
Yes
Yes
No
No
No
No
Mixed LCR No LCR Number Based LCR
Yes