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

Claim 15:
16. A method for transmitting an originating telephone number of a telecommunications terminal to a server by the telecommunications terminal, comprising:
receiving 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 sending the voice call setup request or voice call setup requests, respectively, directed to the server telephone number or server telephone numbers, respectively, comprises sending the voice call setup request or voice call setup requests, respectively, within a time window, wherein the time window comprises a time point communicated from the server to the telecommunications terminal from which the time window begins to run and a duration transmitted from the server to the telecommunications terminal for the time window to run, or a time end point.