177 Matrix VISIONPRO System Manual
Least Cost Routing (LCR)
Least Cost Routing (also referred to as Automatic Route Selection) is an expense control feature of VISIONPRO.
Least Cost Routing (LCR) is useful when there are different trunk lines for making outgoing calls, and the service
providers of these trunks offer different tariffs for calls made to certain locations or numbers or during a particular
time of the day.
When a trunk call is made from a station of VISIONPRO, LCR recognizes where the call is going to be routed. It
selects the lowest cost trunk from all the trunks allotted to that station to make outgoing calls, depending upon how
the LCR is configured.
The system can be configured to select the most cost effective trunk for the time of the day when the call is made
from the station, or to select the most cost effective trunk for the destination number dialed from the station, or to
select the most cost effective trunk considering both time of the day and the destination number.
VISIONPRO supports three types of LCR, which can be configured:
1. Time zone based LCR: This type of LCR may be used when you have trunk lines of more than one
Service Provider, and each offers a different tariff according to the time of the day.
For example, Service Provider 1 offers a lower tariff for calls made between 9am to 8pm, while Service
Provider 2 offers a lower tariff for calls made between 8pm to 9am.
When Time zone based LCR is configured, the system uses the Online-dialing logic, whereby digits dialed
by the user are directly passed on to the trunk.
2. Number based LCR: This type of LCR may be used when you have trunk lines of more than one Service
Provider, and each offers different tariffs according to the area or distance, or phone numbers dialed. For
instance, Service Provider 1 provides lower calling rates for calls made from City A to City B, than Service
Provider 2 and Service Provider 3.
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 to the trunk.
3. Mixed LCR: This logic is used when the rates of service providers differ both Time zone wise and number
wise. For example, Service Provider 1 offers lower rates for calls made from City A to City B during peak
hours 9am to 8pm, as compared to Service Provider 2, whereas Service Provider 2 offers lower rates for
calls made from City A to City B during off peak hours (8pm to 9 am).
When Mixed LCR is configured, the system uses Store and Forward dialing logic, whereby digits dialed by
the user are first stored at a memory location in the system, and then dialed out on the lowest cost trunk.
How it works
When a station user dials a Trunk Access Code to grab a trunk, the following series of events take place.
• The system checks if LCR type is selected and depending on that allots a trunk to the station as per
following conditions.
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