Specification

How to implement incoming call authentication.

After implementation based on the API specification, incoming call authentication can be introduced.
Refer to the demo.

About Supported Devices.

All devices with phone numbers are covered, including fixed-line phones, cell phones, PHS, IP phones, and IP phone applications.

About blocked calls.

When dialing out with the Do Not Call setting or 184 assigned, incoming call authentication cannot be performed.

Redialing and wrong number calls to the incoming call verification number (050 number).

Calls are blocked on the server side unless they go through service incoming call authentication procedure.
This is not counted as an incoming call verification use, and is therefore not subject to billing.