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[Spam Call Prevention] Incoming Call Permission Function Using a Whitelist

It is a system that only receives the permit number, reducing the burden and risk on the site.

■What is a Whitelist (Incoming Call Permission Setting)? A whitelist (incoming call permission setting) is a feature that allows incoming calls to be restricted to only those phone numbers that have been pre-approved, preventing calls from any numbers not on the list. ■Benefits of the Feature - It helps reduce the risk of unexpected calls (such as nuisance calls), thereby lowering operational risks. - It becomes easier to suppress nighttime ringing and unnecessary responses, which is expected to reduce the burden on the field and operations. - It standardizes communication channels for inquiries and maintenance, facilitating smoother transitions and operations. - In environments promoting automation and labor reduction, it enables operational designs that connect only with necessary parties, helping maintain support quality.