LCR Logic

Here simple LCR (Least Cost Routing) e.g. by price is explained in example:

= Example

We have 2 providers A and B.

Dialed destination is 921XXXXXXXXXX

Provider A has such rates for prefixes(destinations):

• 92 rate 0.1

No other destination starts with 92

Provider B has such rates for prefixes:

• 92 rate 0.05
• 921 rate 0.2

So LCR in MOR will group this providers in following order:

• Provider A with rate 0.1 (92)
• Provider B with rate 0.2 (921)

It first dials through Provider A, if call fails, Provider B will be used to send the call.

If call is ANSWERED, BUSY or there's NO ANSWER - then call ends. And Provider B is not used.

It is used ONLY when call fails - CONGESTION.

In following schema LCR logic is presented in graphical way: