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Module 2: Product Description

Call Scenarios

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Local Number Portability
Let's look at a few N-1 Call Scenarios that illustrate both Call Routing and Default Query Services.

Scenario 1

  1. Caller A calls Caller B.

  2. Caller B cannot be found on Service Provider (SP) 1's switch, so a query is launched to the SP 1's LNP Database (DB) to determine the LRN for Caller B.

  3. The call is routed to Caller C, SP 2's switch. The LRN returned is Caller C. SP 2 terminates the call to Caller B.
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