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Module 2: Product Description

Call Scenarios

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Local Number Portability
Now we'll review three additional N-1 Call Scenarios. The diagram on your left illustrates a scenario for a Wireline Local Call.

Scenario 6

Local call outside ported area - LNP/LRN Capable LEC:

  1. Caller B makes a call within their Local Calling Area (LCA), but from outside the Metropolitan Statistical Area (MSA) and ported area, to Caller C.
  2. LEC-4 is the N-1 carrier that performs the "database dip" to determine the LRN and then routes the call to LEC-2. If no direct connection exists between LEC-4 and LEC-2, calls may be terminated through a tandem agreement with LEC-1.
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