Matrix EPABX Vision-206S, System Manual

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Matrix
124 Vision System Manual
Least Cost Routing (LCR)
What’s this?
Different basic service providers offer different rates for different times of the day and the destination numbers.
For example, Reliance may offer cheaper rates compared to BSNL for calls made during peak hours. i.e. 09.00
to 22.00. Whereas BSNL may offer cheaper rates as compared to Reliance during off peak hours i.e. 22.00 to
09.00.
Least cost routing logic is used to select the cheapest trunk from the total allotted trunks to the station to make
outgoing calls. This way, the cost of outgoing calls can be minimized, by selecting the most economical trunk
depending upon the time of call and the destination number.
Above diagram shows that few trunks of both BSNL and Reliance are interfaced with Vision. Here it would be
desirable to use LCR facility if these service providers offer different rates.
Vision offers three different types of LCR logic.
Time based LCR
-This logic is used when different SPs provide different rates during different timings of the
day. This logic uses online dialing. In online dialing, the digits dialed by the user are directly passed on the
trunk.
Number based LCR
-This logic is used when different SPs provides different rates for different areas, different
phone numbers. For example, BSNL provides cheaper rates for a call made from Baroda to Delhi as compared
to Reliance. This logic uses Store and Forward dialing. In Store and Forward dialing, the digits are first stored
in a memory location and then these are dialed on the trunk.
Mixed LCR
-This logic is used when the rates of service providers differ both time wise and number wise. For
example, BSNL provides cheaper rates for a call made from Baroda to Mumbai during peak hrs (09.00 to
22.00) as compared to Reliance. Whereas Reliance provides cheaper rates for a call made from Baroda to
Delhi during off peak hours (22.00 to 09.00). This logic uses Store and Forward dialing. In Store and Forward
dialing, the digits are first stored in a memory location and then these are dialed on the trunk.