System and method for selecting a feature

1. A method for selecting a feature, comprising:

selecting the feature that establishes processing of a request in an operating state of a reference terminal, the feature being selected from a selection terminal;

directing the request via the selection terminal to the reference terminal that is in the operating state;

transmitting a list with at least one feature that can be selected to the selection terminal from the reference terminal side;

displaying the at least part of the list at the selection terminal;

selecting a feature from the list at the selection terminal;

transmitting selection data to the side of the reference terminal; and

performing the function related to the feature selected as a function of the selection data.

2. The method according to claim 1 , wherein the feature relates to processing of a request in the “busy” operating state.

3. The method according to claim 1 , further comprising:

transmitting data between at least one busy terminal and the reference terminal;

generating a request to transmit data between the selection terminal and the reference terminal by the selection terminal during data transmission between the busy terminal and the reference terminal; and

processing the request as a function of a feature that is selected from the selection terminal side.

4. The method according to claim 1 , wherein the feature relates to at least one of the following:

a function such that arrival of the request is signaled to the reference terminal, without ending the data transmission between the reference terminal and the busy terminal,

a function that terminates data transmission between the busy terminal and the reference terminal, and establishes a data transmission connection in accordance with the request,

a function such that the data transmission between the busy terminal and the reference terminal has ended is signaled to the selection terminal, after it has ended, and

a function such that the selection terminal is involved in the data transmission between the busy terminal and the reference terminal.

5. The method according to claim 1 , wherein data is transmitted in data packets between the terminals in at least one segment of a data transmission network, and/or the data is transmitted in accordance with the Internet Protocol or a protocol based on this protocol.

6. The method according to claim 5 , wherein the data is transmitted between the terminals in transmission channels in at least one segment of a data transmission network.

7. The method according to claim 6 , wherein the reference terminal and the selection terminal are operated at different switching centers of a circuit-switched telecommunications network, and/or

ISUP messages are transmitted between the switching centers to process the data transmission request and select the feature.

8. The method according to claim 6 , wherein the reference terminal and the non-busy terminal are operated on different connection modules of a switching center of a circuit-switched telecommunications network, and/or

messages internal to the switching center, which correspond to ISUP messages, are transmitted between the connection modules to process the data transmission request and select the feature.

9. The method according to claim 6 , wherein the busy terminal and/or the reference terminal and/or the selection terminal are operated on a telecommunications system or on at least one switching center that performs the functions of a telecommunications system, and the telecommunications system control processes the data transmission request.

10. A unit that performs the functions of a telecommunications system, comprising:

a control unit;

a reference terminal operated on the control unit to select a feature to establish processing of requests in an operating state of the reference terminal, wherein

the control unit is configured such that the feature can be selected from a selection terminal that directs a request to the reference terminal in the operating state.

11. The unit according to claim 10 , wherein the unit selects the feature that establishes processing of a request in an operating state of a reference terminal, the feature being selected from a selection terminal, and directs the request via the selection terminal to the reference terminal that is in the operating state.

12. A terminal with a control unit, the control unit performing the following:

selecting the feature that establishes processing of a request in an operating state of a reference terminal, the feature being selected from a selection terminal; and

directing the request via the selection terminal to the reference terminal that is in the operating state.