ATTACHMENT B

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SECTION 1
COST S m Y DOCUMENTATION
INTRODUCTION AND OVERVIEW
SERVICE PROVIDER NUMBER PORTABILITY
This Long Run Incremental Cost (LRIC) study is being provided to
support Service Provider Number Portability.
The Long Run Incremental costs presented in this study are volume
sensitive. Service Provider Number Portability has no volume
insensitive costs.
Service Provider Number Portability allows Alternative Local Exchange
Carriers (ALECs) to offer number portability to their customers. ALEC
customers retain their original BellSouth directory number while
remaining at the same location and subscribing to a ALEC for their
local telephone service.
Recurring costs presented in this study are directly assigned,
incremental and levelized to be appropriate for the 1996-1997 study
period. The arrangements outlined in these studies are interim
solutions to the number portability problem. The deployment of AINbased
number portability is currently scheduled to begin deployment in
1998. Nonrecurring costs follow the same convention and represent
1996-1997 level costs also. These costs are developed by using 1995 -
level incremental loadings, annual cost factors, and directly assigned
labor rates.
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