Telephone interface unit and a method of configuring headset system to telephone device

1. A telephone interface unit configured to automatically set up a headset system to a telephone device, the headset system comprising a headset and the telephone interface unit, the telephone interface unit comprising

a switching unit configured to switch at least a headset transmit signal line and a headset receive signal line to a telephone transmit signal line and a telephone receive signal line, respectively, and

a processor being pre-programmed with one or more telephone device permutation settings,

wherein the processor is configured to receive, from the telephone device, telephone configuration information on the basis of which a specific permutation setting is selected among the one or more pre-programmed permutation settings, the processor being configured to control the switching unit to switch at least the headset transmit signal line and the headset receive signal line to the telephone transmit signal line and the telephone receive signal line, respectively, according to the specific permutation setting.

2. A telephone interface unit according to claim 1 , wherein the telephone configuration information comprises a pointer to the specific permutation setting.

3. A telephone interface unit according to claim 1 , wherein the telephone interface unit further comprises a variable gain unit configured to set the gain of the headset transmit signal line.

4. A telephone interface unit according to claim 1 , wherein the processor is configured for receiving volume control settings and adjusting the headset receive volume according to the received volume control settings.

5. A telephone interface unit according to claim 1 , wherein the set up is performed automatically based on the received telephone configuration information, without receiving a test signal.

6. A telephone interface unit according to claim 1 , wherein the telephone interface unit further comprises an electronic hook switch operation.

7. A telephone interface unit according to claim 1 , wherein the switching unit comprises a plurality of switches.

8. A telephone interface unit according to claim 7 , wherein each of the plurality of switches couples one telephone signal line to one headset signal line.

9. A telephone interface unit according to claim 7 , wherein the plurality of switches are provided in a switch matrix, settable to any of a plurality of switch configurations, wherein each switch configuration in the plurality of switch configurations comprises a predetermined setting for each of the plurality of switches, and

the processor being configured to set the switch matrix to a switch configuration by setting the plurality of switches to the predetermined setting for the switch configuration.

10. A telephone interface unit according to claim 1 , wherein the telephone configuration information is provided from the telephone device to the telephone interface unit in accordance with a first protocol.

11. A telephone interface unit according to claim 1 , wherein the telephone configuration information comprises telephone model information and wherein the telephone interface unit comprises a memory unit for storing data sets comprising telephone model information and telephone permutation settings, the processor being configured to read from the memory unit the specific permutation setting corresponding to the telephone model information provided with the telephone configuration information.

12. A telephone interface unit according to claim 10 , wherein the telephone configuration information is comprised by at least one data message.

13. A telephone interface unit according to claim 1 , wherein the permutation settings comprises information on telephone signal line settings.

14. A method of setting up a headset system to a telephone device, the headset system comprising a headset and a telephone interface unit, wherein the headset is connectable to the telephone interface unit configured to interconnect the telephone device and the headset, the method comprising the steps of

receiving in the telephone interface unit, telephone configuration information from the telephone device,

selecting in a processor a specific pre-programmed permutation setting based on the received telephone configuration information,

controlling the processor to switch a switching unit in the telephone interface unit to connect a headset transmit signal line and a headset receive signal line to a telephone transmit signal line and a telephone receive signal line, in accordance with the specific pre-programmed permutation setting.

15. A self-configuring headset system, the headset system comprising a headset and a telephone interface unit, the telephone interface unit comprising

a switching unit configured to switch at least a headset transmit signal line and a headset receive signal line to a telephone transmit signal line and a telephone receive signal line, respectively, and

a processor being pre-programmed with one or more telephone device permutation settings,

wherein the processor is configured to receive, from the telephone device, telephone configuration information on the basis of which a specific permutation setting is selected among the one or more pre-programmed permutation settings, the processor being configured to control the switching unit to switch at least the headset transmit signal line and the headset receive signal line to the telephone transmit signal line and the telephone receive signal line, respectively, according to the specific permutation setting.