Patent ID: 11909909
Assignee: TELL-SEC AG
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A computer program product comprising instructions stored on a computer-readable storage medium for executing a method for determining an originating telephone number of a telecommunications terminal when the computer program is executed on the telecommunications terminal, comprising:
reading a server telephone number transmitted from a server; and
sending a voice call setup request directed to the server telephone number, wherein the originating telephone number is transmitted with the voice call setup request and wherein call number transmission is enabled,
wherein, in the method performed by the computer program, sending the voice call setup request or voice call setup requests directed to the server telephone number or server telephone numbers comprises sending the voice call setup request or voice call setup requests within a time window, the time window comprising a time communicated by the server to the telecommunications terminal from which the time window begins to run and a duration transmitted by the server to the telecommunications terminal for the time window to run.