| 摘要 |
In some communication services such as, for example, virtual card calling (VCC), authentification methods are employed to check the access authorization of the caller using the communication service to make possible misuse more difficult. The present invention make such possible misuse even more difficult and undesirable, by instituting a preliminary, cancellable charging which is attributable to the caller should the caller be unable to provide proper authentification of access authorization pursuant to predetermined criteria. |
