Patent attributes
A telephone apparatus includes: a call signal detecting unit that detects a call signal transmitted via a public telephone line; an identification information detecting unit that detects source identification information transmitted via the public telephone line; and a source identification information detection control unit that controls an operation of the identification information detecting unit. The source identification information detection control unit actuates the identification information detecting unit when the call signal detecting unit detects the call signal and a predetermined condition is satisfied, and stops or does not actuate the identification information detecting unit when the call signal detecting unit detects the call signal and the predetermined condition is not satisfied.
