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managIng the Pstn transformatIon
of predicted broadband penetration is one of the key enabling
projects as well as setting up the strategy to serve certain loca-
tions only through mobile services. e financial effects with
regard to revenue and cost impact of those projects must not
be counted again in a PSTN migration business case.
• Delta case: An investment and rollout decision for PSTN
migration should finally be made through delta NPV calcula-
tion of incremental revenue, operational cost development, and
CAPEX spending for interim solution versus migration scenario.
e respective input has to be provided by commercial, product
portfolio, ...