DE102016209920B4 - Communication device and method for the public radio - Google Patents

Abstract

Communication device for the public agency radio comprising a headset (1) with a microphone (6) and two loudspeakers, characterized by a wireless transmission device (13) comprising a first Bluetooth module (14) arranged in a housing of the headset (1) and with the microphone (6) and each of the loudspeakers is wired, and a dongle (10), wherein the dongle (10) via a wired connection with a microphone unit is connectable and a second Bluetooth module (15), wherein the first Bluetooth Module (14) for simultaneously receiving first and second audio signals (16, 17) and transmitting a third audio signal (18), the second Bluetooth module (15) for simultaneously transmitting the first and second audio signals (16, 17) and receiving the third audio signal (18) is arranged and wherein the first Bluetooth module (14) for transmitting the first and the second audio signal (16, 17) to a respective one the loudspeaker and receiving the third audio signal (18) from the microphone (6) is set up, wherein the first audio signal (16) is a listening channel and the second audio signal (17) is a channel for a communication partner.

Description

The application relates to a communication device which is suitable for the public authority radio, according to the preamble of claim 1. In addition, the application relates to a method for communication for the public agency radio.

Headphone sets, hereinafter referred to as headsets, for the authorities radio are known from the prior art. A typical field of application for such headsets is, for example, in command centers or dispatchers of the police. A user hears a current communication partner and the so-called monitoring channel and can talk to the communication partner himself via the built-in microphone.

Such a headset allows freedom of both arms during a user's communication and often includes two earphone-connected headphone cups with speakers for reproducing a two-channel audio signal and a microphone connected via a microphone arm to the remaining components of the headset. In addition, such a headset usually includes a connection cable for connecting the headset with a desktop station. Via the connection cable, a signal recorded by the microphone is transmitted to the desktop station and the two-channel audio signal is transmitted from the desktop station to the headset.

In the field of accessories for mobile phones headsets are commonly used, which are set up for wireless transmission of an audio signal between the mobile phone and the headset via Bluetooth. Such a headset typically includes a speaker and a microphone and is clamped by a user behind one of the ear cups so that the speaker rests on the outer ear and the microphone is directed toward the mouth. Such a headset is typically suitable for use with most popular cellular phone models. A device comprising a desk phone with a connection interface to which different external radio transceivers can be connected, for example, shows the document US 2008/0081610 A1 , It can be provided here that the different radio transceivers are operated in accordance with different wireless communication protocols.

The wireless transmission of the two audio signals, a significantly increased freedom of movement of the user can be achieved compared to the wired headsets described above. However, the described transmission method by means of Bluetooth can not be easily transferred to the headsets described above for the public agency radio. On the one hand, this is due to the fact that, when used in public service radio, typically a transmission of a two-channel signal (a channel for the communication partner as well as a monitoring channel) from the desktop station is necessary with simultaneous retransmission of the microphone signal. On the other hand, there are increased demands on security against burglary in public radio stations.

It is an object of the present application to propose a communication device for the public authority radio, which allows a user an increased freedom of movement. Moreover, it is an object of the present application to propose a correspondingly suitable method for communication.

This object is achieved by a communication device with the features of claim 1 and by a method having the features of another claim. Advantageous developments emerge with the features of the dependent claims and the embodiments.

The proposed communication device for the public service radio includes a headset with a microphone and two speakers. Moreover, the proposed communication device has a wireless transmission device. The transmission device comprises a first Bluetooth module, which is arranged in a housing of the headset and connected to the microphone and each of the loudspeakers wired, and a dongle. The dongle can be connected to a microphone unit via a wired connection and includes a second Bluetooth module. The first Bluetooth module is configured to simultaneously receive first and second audio signals and transmit a third audio signal. The second Bluetooth module is configured to simultaneously transmit the first and second audio signals and receive the third audio signal. In addition, the first Bluetooth module is configured to transmit the first and second audio signals to a respective one of the speakers and receive the third audio signal from the microphone.

The station is typically a desktop station. Wired connections are typically wired. The dongle may be an adapter whose line connection for connection to the station is a plug connection.

For example, the first audio signal becomes the left earphone signal and the second audio signal becomes the right earphone signal through the speakers played. A transmission of the audio signals takes place simultaneously. By simultaneously transmitting and receiving the audio signals or the simultaneous transmission of the audio signals, a user of the communication device in the sense of full duplex or counter operation while communicating while listening to the audio signals through the speakers and talk about the microphone. As a result, it is not necessary to switch the headset or the dongle between a transmission mode and a reception mode. In this case, it is not absolutely necessary for individual data packets to be sent or received at the same time by the first and second Bluetooth modules. For example, a time division duplex method may be used for the transmission of the audio signals.

Common Bluetooth profiles, which are commonly used for transmission of audio signals by consumer hardware, are not suitable for simultaneous transmission of three audio signals. For example, in the known A2DP profile, two audio signals are transmitted in one direction for listening to stereo music. With the HFP profile, however, two audio signals are transmitted in opposite directions for telephoning. Therefore, the proposed communication device typically uses a different Bluetooth profile suitable for the simultaneous wireless transmission of three audio channels in a full-duplex connection.

The proposed communication device typically provides a sound quality that corresponds to a sound quality of wired headsets typically used by government broadcasting. However, in the proposed communication device eliminating the need for a cable connection between the headset and desktop station, the proposed communication device allows a large degree of freedom of movement for a user of the headset.

The application further relates to a correspondingly advantageous method for communicating with the public agency radio. The method provides a communication device and a station as described above and / or below. In a further step, the third audio signal is recorded by the microphone. In addition, the third audio signal is transmitted to the first Bluetooth module and transmitted by the first Bluetooth module. The third audio signal is then received by the second Bluetooth module and transmitted to the station. In addition, the first and second audio signals are transmitted from the station to the second Bluetooth module and sent by the second Bluetooth module. Subsequently, the first and second audio signals are received by the first Bluetooth module and forwarded to a respective one of the two speakers. The respective first of the two loudspeakers then reproduces the first or the second audio signal. The transmission and reception of the first and second audio signals and the transmission and reception of the third audio signal occur simultaneously.

For the method of communication, apart from the first and second Bluetooth modules, typically no further means for the wireless transmission are necessary. Thus, it is typically provided that the communication device in addition to the first and the second Bluetooth module does not include any other functional Bluetooth modules. It can also be provided that the communication device in addition to the first and the second Bluetooth module no further functional modules for wireless communication, in particular in the sense of a change and / or counter operation includes.

Typically, the audio signals transmitted by the station to the second Bluetooth module are analog signals. Likewise, the audio signal transmitted by the second Bluetooth module to the station can be an analog signal. In addition, typically, the audio signal passed from the first Bluetooth module to the speakers is an analog signal. Likewise, the audio signal received by the microphone and transmitted to the first Bluetooth module may be an analogue signal. Typically, the first Bluetooth module and / or the second Bluetooth module comprises an analog-to-digital converter for converting the analog signals described above into digital signals, which are then transmitted as digital signals wirelessly between the Bluetooth modules. Moreover, the first Bluetooth module and / or the second Bluetooth module typically include a digital-to-analog converter for converting the above-described digital signals to analog signals after receiving.

In a particularly preferred embodiment, the first Bluetooth module with a first memory unit and the second Bluetooth module are connected to a second memory unit. The same permanent key can be stored on the first memory unit and on the second memory unit for encryption and decryption of the audio signals that can be transmitted between the first and the second Bluetooth module.

It can be provided that the permanent key is read out by the first Bluetooth module. In addition, the third audio signal may be transmitted by the first Bluetooth module based on the permanent key before sending the third audio signal are encrypted. Furthermore, the permanent key can be read out by the second Bluetooth module. The first and second audio signals may be encrypted by the second Bluetooth module based on the permanent key prior to transmission of the first and second audio signals. Moreover, the first and second audio signals may be decrypted by the first Bluetooth module based on the permanent key after receiving the first and second audio signals. In addition, the third audio signal can be decrypted by the second Bluetooth module based on the permanent key after receiving the third audio signal.

The permanent key can be determined by a per se known method, for example, Elliptic Curve Diffie-Hellman method. By using a permanent key for encryption and decryption, the encryption can be correspondingly strong. For example, a key length used may be at least 128 bits. As a result, it is possible to prevent the audio signals transmitted between the first and the second Bluetooth module from being intercepted or manipulated.

It can be provided that the permanent key is used directly for encrypting the audio signals. It may also be provided in other embodiments, that from the permanent key, a first key stream is generated by the first Bluetooth module. It may also be that from the permanent key, a second key stream is generated by the second Bluetooth module. The first and second audio signals may be encrypted by the second keystream. The third audio signal can be encrypted by the first keystream.

It may be provided for an increase in security against eavesdropping that the key streams are changed in a new connection between the first and second Bluetooth module. It can also be provided that the key flows are changed after a specified time, for example every 15 minutes.

To make the communication device, the headset and the dongle are made. In addition, during manufacture, the same permanent key can be stored on the first and second memory units. Subsequently, the communication device can be delivered.

According to a typical embodiment, the first Bluetooth module is connected to a third memory unit. In addition, the second Bluetooth module can be connected to a fourth memory unit. A hardware address of the dongle is typically stored on the third memory unit. Additionally or alternatively, a hardware address of the headset is typically stored on the fourth storage unit.

Of course, the memory units can also be embodied as components of the respective Bluetooth modules. In addition, for example, the first and third storage units may be implemented as a single storage unit or the second and fourth storage units may be embodied as a single storage unit.

It can be provided that the hardware address of the dongle is read out of the third memory unit by the first Bluetooth module. The dongle can then be identified by the first Bluetooth module based on the read-out hardware address of the dongle. Subsequently, a connection between the first Bluetooth module and the second Bluetooth module for transmitting the audio signals can be released.

To identify the dongle, for example, the hardware address of the dongle can be transmitted wirelessly from the second Bluetooth module to the headset. Subsequently, the dongle can be identified by comparing the transmitted hardware address of the dongle with the read-out hardware address of the dongle.

Additionally or alternatively, the hardware address of the headset can be read out of the fourth memory unit by the second Bluetooth module. The headset can then be identified by the second Bluetooth module based on the read out hardware address of the headset. Then, a connection between the first Bluetooth module and the second Bluetooth module for transmitting the audio signals can be released.

To identify the headset, for example, the hardware address of the headset can be transmitted from the first Bluetooth module to the dongle. Subsequently, the headset can be identified by comparing the transmitted hardware address of the headset with the read-out hardware address of the headset.

In this way, a fixed coupling is created between exactly one dongle and exactly one associated headset for producing a wireless Bluetooth connection as described above. Here, the dongle makes only one connection with the associated headset and / or the headset only a wireless connection with the associated dongle. Thus, a dongle with exactly one associated headset are uniquely paired. A wireless connection with other devices does not take place here. This increases the security against eavesdropping.

In the manufacture of the communication device, the hardware address of the dongle on the third memory unit and the hardware address of the headset are typically stored on the fourth memory unit. Subsequently, the communication device can be delivered. After delivery, the dongle and headset typically can not be paired with other devices by a user.

In one possible embodiment, the headset comprises a button accessible to a user. The pushbutton is any manually operated signal generator. The button may for example be a capacitive button, a switch or a finger-covered photodiode. The button can be wired to the first Bluetooth module connected. The first Bluetooth module is typically configured to transmit a status signal from the button, and the second Bluetooth module is typically configured to receive the status signal of the button. The button can take on the function of a push-to-talk button. Pressing the button typically does not cause any interruption in the transmission of the third audio signal between the first and second Bluetooth modules. Typically, as a result of the transmission of the status signal, a transmission of the third audio signal from the second Bluetooth module to the station is interrupted or released. Typically, the third audio signal is transmitted from the second Bluetooth module to the station when the button is held down by the user. When the user releases the button, the transmission of the third audio signal from the second Bluetooth module to the station is interrupted.

The present application also relates to a plurality of communication devices comprising a first communication device with a first permanent key and further communication devices with further permanent keys. The first permanent key is typically different from the other permanent keys. In addition, the other permanent keys typically differ from each other. In this way, a fixed coupling between the dongle and the headset of the first communication device is generated. For example, a pairing of the dongle of the first communication device is possible only with the headset of the first communication device. Also, knowing the hardware addresses of this dongle and this headset typically does not allow for mismatching or listening to the first communication device.

The features referred to in the present application with respect to the communication device may be transferred to the method for communicating. Conversely, the features referred to in the method for communicating may be transferred to the communication device.

• 1 eine perspektivische Ansicht eines Headsets,
• 2 eine perspektivische Ansicht eines Dongles,
• 3 eine schematische Übersicht einer drahtlosen Übertragungseinrichtung,
• 4 eine grafische Darstellung von Verfahrensschritten bei einer Herstellung einer Kommunikationseinrichtung und
• 5 ein Flussdiagramm zu einem Verbindungsaufbau zwischen dem Headset und dem Dongle.

Embodiments will be described below with reference to the drawings. Show it

• 1 a perspective view of a headset,
• 2 a perspective view of a dongle,
• 3 a schematic overview of a wireless transmission device,
• 4 a graphical representation of process steps in a production of a communication device and
• 5 a flowchart of a connection between the headset and the dongle.

In 1 is a schematic view of a headset 1 shown. The headset 1 has two headphone shells 2 . 3 on, over a hanger 4 connected to each other. The headphones clams 2 . 3 each include a speaker. On one of the headphones 2 is a microphone arm 5 attached to the one of the headset 2 In turn, a microphone is removed 6 , For example, an electret microphone is attached. The microphone arm 5 is typically plastically deformable and / or pivotable. The headphones clams 2 . 3 or one of the headphones 3 can or can be pivoted on the bracket 4 be attached, for example, pivotally up to 180 degrees.

In a case of one of the headphones 2 an unillustrated first Bluetooth module is arranged, which is accessible to a user typically only damage to the housing. In addition, the headset includes 1 in the case of this headphone shell 2 a rechargeable battery that powers the first Bluetooth module. In addition, on an outside of the housing of this headphone shells 2 an on / off switch 7 , a charging socket 8th For example, a micro-USB charging socket for charging the battery and a button 9 arranged accessible to the user. The button may for example be a capacitive button, a switch or a finger-covered photodiode. Furthermore, on the outside of the housing Ear cup 2 arranged a light emitting diode, not shown, which is adapted to the user an operating state of the headset 1 to signal. The microphone 6 , the speakers, the button 9 , the on / off switch 7 and the battery are electrically connected to each other via cable connections.

In 2 is a perspective view of a dongle 10 shown. In a housing 11 of the dongle 10 a second Bluetooth module is arranged, which is typical for the user only under a damaged housing 11 of the dongle 10 is accessible. On an outside of the housing 11 of the dongle 10 For example, one or more light-emitting diodes may be arranged which provide the user with an operating state of the dongle, for example 10 , a connection state of a wireless connection of the dongle described in more detail below 10 with the headset 1 and / or a state of the button 9 of the headset 1 signal.

In addition, the dongle points 10 a plug 12 , For example, a Hirose plug, for producing an electrically conductive connector with a desk microphone, not shown on. The dongle 10 can be supplied with power via the plug connection with the desktop station.

The headset 1 and the dongle 10 are components of a communication device, which further comprises a wireless transmission device 13 includes. A schematic of how the wireless transmission works 13 is in 3 shown. Recurring features are given the same reference numerals in this and the following figures. The transmission device 13 is set up for wireless communication via a Bluetooth connection that is between the first Bluetooth module 14 of the headset 1 and the second Bluetooth module 15 of the dongle 10 can be produced. The Bluetooth connection allows for full-duplex audio transmission 16 . 17 . 18 between the headset 1 and the dongle 10 , That means the Bluetooth modules 14 . 15 the communication device are for simultaneously transmitting and receiving the audio signals 16 . 17 . 18 set up. Typically, the communication device includes adjacent to the first and second Bluetooth modules 14 . 15 no further functional means for wireless communication in the sense of a change and / or counter operation.

The second Bluetooth module 15 receives two analog audio signals from the desktop station, indicated by the arrows with the reference numerals 19 and 20 is indicated. These audio signals are then used as a first audio signal 16 and a second audio signal 17 from the second Bluetooth module 15 to the first Bluetooth module 14 wirelessly transmitted. These audio signals then become an analog and two-channel audio signal from the first Bluetooth module 14 transmitted to the speakers, as indicated by the arrows with the reference numerals 21 . 22 is indicated. Through the speakers, the two-channel audio signal is then played back.

The first Bluetooth module 14 receives an analog audio signal picked up by the microphone, indicated by the arrow labeled 23 is indicated. This audio signal is then passed through the first Bluetooth module 14 as a third audio signal 18 wirelessly to the second Bluetooth module 15 transmitted. Subsequently, this audio signal as an analog voice signal from the second Bluetooth module 15 transmitted to the desktop station, which is indicated by the arrow with the reference numeral 24 is indicated.

In addition, the first and the second Bluetooth module have 14 . 15 each an analog-to-digital converter and a digital-to-analog converter, by which the analog signals are converted before transmission in digital signals and after receiving into analog signals.

The audio signals 16 . 17 . 18 are transmitted as encrypted voice signals, in particular broadband voice signals, wirelessly. In 4 schematically a flowchart is shown, which is intended to illustrate a manufacturing method of the communication device. Here are the hardware components of the headset 1 and the dongle 10 made as indicated by the reference numeral 25 is shown. The first and the second Bluetooth module 14 . 15 hereafter each have a data memory. In a further manufacturing step are on the data storage of the headset 1 the hardware address of the dongle 10 and on the datastore of the dongle 10 the hardware address of the headset 1 stored (reference numeral 26 ). Then a permanent link key, ie a common key for later encryption of the audio signals to be transmitted 16 . 17 . 18 , generated with an exemplary key length of 128 bits and stored on the respective data storage (reference numeral 27 ). Subsequently, a product inspection in the test field can still be done and the communication device can be delivered. The latter is indicated by the reference numeral 28 shown.

In the production of multiple communication devices for each of these different link keys are generated and used. However, a single headset dongle pair of the same communication device always has only one common link key.

Before sending the audio signals 16 . 17 . 18 These are controlled by the corresponding Bluetooth module 14 . 15 encrypted using a keystream generated from the link key. After receiving the audio signals 16 . 17 . 18 These are controlled by the corresponding Bluetooth module 14 . 15 decrypted using a keystream generated from the link key.

In the 3 is also a connection 29 of the button 9 with the first Bluetooth module 14 shown. A status signal 30 of the button 9 becomes wireless and encrypted by the first Bluetooth module 14 to the second Bluetooth module 15 transfer. Based on the status signal 30 of the button 9 can through the second bluetooth module 15 be set whether the analog voice signal 24 is transmitted to the desk station. It can also be provided that the status signal 30 of the button 9 is transmitted to the desktop station, which is indicated by the arrow with the reference numeral 31 is indicated. As a result, it can be determined by the desktop station, for example, whether the voice signal 24 is passed on to other connected to the desktop station communication equipment. The button 9 thus has the functionality of a push-to-talk button.

In addition, the light emitting diodes described above are shown as arrows with the reference numerals 32 - 35 shown. In addition, the on / off switch 7 and the charging socket 8th for the power supply of the headset 1 or the first Bluetooth module 14 as well as the power supply 36 of the dongle 10 or the second Bluetooth module 15 shown schematically.

A setup of a wireless connection between the headset 1 and the dongle 10 takes place automatically when the headset 1 not turned off and if the dongle 10 connected to the desk station and if the headset 1 also within reach of the dongle 10 located. 5 schematically shows a flowchart for connection establishment. Here, the dongle first turns on 10 on (reference numeral 37 ). Then the dongle looks for 10 after the headset 1 based on the data memory of the first Bluetooth module 14 stored hardware address of the headset 1 (Reference 38 ). The dongle can be stored by the stored hardware address (es) 10 and the headset 1 identify each other. Unless the headset 1 not found, the dongle looks for 10 the headset 1 again, which is indicated by the arrow with the reference numeral 39 is indicated. If the headset 1 was found (reference numeral 40 ) builds the dongle 1 an encrypted connection with the headset 1 on (reference numeral 41 ). Subsequently, it is repeatedly checked whether the transmitted signals and / or data are plausible (arrow with reference number 42 ). If this is not the case, the connection is aborted and the dongle 10 looking for the headset 1 again (arrow with reference number 43 ). The same applies if, for example, the dongle 10 through the headset 1 is sought or found, it may be provided in this case that, for example, the headset 1 establishes the connection and checks the plausibility of the transmitted signals and / or data.

Only features disclosed in the embodiments of the various embodiments can be combined and claimed individually.

Claims (13)

Communication device for the public agency radio comprising a headset (1) with a microphone (6) and two loudspeakers, characterized by a wireless transmission device (13) comprising a first Bluetooth module (14) arranged in a housing of the headset (1) and with the microphone (6) and each of the loudspeakers is wired, and a dongle (10), wherein the dongle (10) via a wired connection with a microphone unit is connectable and a second Bluetooth module (15), wherein the first Bluetooth Module (14) for simultaneously receiving first and second audio signals (16, 17) and transmitting a third audio signal (18), the second Bluetooth module (15) for simultaneously transmitting the first and second audio signals (16, 17) and receiving the third audio signal (18) is arranged and wherein the first Bluetooth module (14) for transmitting the first and the second audio signal (16, 17) to a respective one the loudspeaker and receiving the third audio signal (18) from the microphone (6) is set up, wherein the first audio signal (16) is a listening channel and the second audio signal (17) is a channel for a communication partner. Communication device after Claim 1 characterized in that the first Bluetooth module (14) is connected to a first memory unit and the second Bluetooth module (15) is connected to a second memory unit, wherein on the first memory unit and on the second memory unit respectively the same permanent key for a Ver - And decryption of the transferable between the first and the second Bluetooth module (15) audio signals (16, 17, 18) is stored. Communication device according to one of Claims 1 or 2 , characterized in that the first Bluetooth module (14) is connected to a third memory unit and the second Bluetooth module (15) is connected to a fourth memory unit, wherein a hardware address of the dongle (10) is stored on the third storage unit and / or a hardware address of the headset (1) on the fourth storage unit. Communication device according to one of Claims 1 to 3 characterized in that the headset (1) comprises a user-accessible button (9) connected in line with the first Bluetooth module (14), the first Bluetooth module (14) for transmitting a status signal ( 30) of the button (9) is set up and the second Bluetooth module (15) is set up to receive the status signal (30) of the button (9). Communication device according to one of Claims 1 to 4 Characterized in that it comprises no further functional modules for wireless communication in addition to the first and the second Bluetooth module (14, 15). Communication device according to one of Claims 1 to 5 , characterized in that the line-connected connection for connecting the dongle (10) to the station is a plug connection. Variety of communication devices, characterized by a first communication device according to Claim 2 or one on Claim 2 A back claim with a first permanent key and further communication devices with further permanent keys, wherein the first permanent key is different from the further permanent keys, and wherein the further permanent keys differ from each other. A method of communication for the public agency radio, characterized by the following steps: - providing a communication device according to one of the preceding claims and a speech station, - recording the third audio signal (18) by the microphone (6), - transmitting the third audio signal (18) the first Bluetooth module (14), - transmitting the third audio signal (18) by the first Bluetooth module (14), - receiving the third audio signal (18) by the second Bluetooth module (15), - transmitting the third audio signal (18) to the station, - transmitting the first and second audio signals (16, 17) from the station to the second Bluetooth module (15), - transmitting the first and second audio signals (16, 17) by the second Bluetooth module (15), - receiving the first and second audio signals (16, 17) by the first Bluetooth module (14), - forwarding the first and second audio signals (16, 17) to a respective one of the two speakers, - playback n of the first and second audio signals (16, 17) through the respective one of the two loudspeakers, wherein the transmission and reception of the first and second audio signals (16, 17) and the transmission and reception of the third audio signal (18) occur simultaneously, and wherein the first Audio signal (16) is a listening channel and the second audio signal (17) is a channel for a communication partner. Method according to Claim 8 wherein the communication device is a communication device according to Claim 2 or a claim based on claim, characterized by the following steps: - reading the permanent key by the first Bluetooth module (14), - encrypting the third audio signal (18) by the first Bluetooth module (14) based on the permanent key before transmitting the third audio signal (18), - reading the permanent key by the second Bluetooth module (15), - encrypting the first and the second audio signal (16, 17) by the second Bluetooth module (15) based on the permanent Decrypting the first and second audio signals (16, 17) by the first Bluetooth module (14) on the basis of the permanent key after receiving the first and second audio signals (16 , 17) and - decrypting the third audio signal (18) by the second Bluetooth module (15) based on the permanent key after receiving the third audio signal (18). Method according to Claim 9 characterized by the steps of: - generating a first keystream from the permanent key by the first bluetooth module (14), - generating a second keystream from the permanent key by the second bluetooth module (15), the first and the second Audio signal (16, 17) is encrypted by the second key stream and wherein the third audio signal (18) is encrypted by the first key stream. Method according to one of Claims 8 to 10 wherein the communication device is a communication device according to Claim 3 or one on Claim 3 is back claim, characterized by the steps of: - reading the hardware address of the dongle (10) by the first Bluetooth module (14) from the third memory unit, - Identifying the dongle (10) by the first Bluetooth module (14) based on the read-out hardware address of the dongle (10), - Releasing a connection between the first Bluetooth module (14) and the second Bluetooth module (15) Transmission of the audio signals (16, 17, 18) and / or - readout of the hardware address of the headset (1) by the second Bluetooth module (15) from the fourth memory unit, - identification of the headset (1) by the second Bluetooth Module (15) based on the read-out hardware address of the headset (1), - releasing a connection between the first Bluetooth module (14) and the second Bluetooth module (15) for transmitting the audio signals (16, 17, 18). Method for producing a communication device according to Claim 2 or one on Claim 2 back claim with the following steps: - making the headset (1), - making the dongle (10), - storing the same permanent key on the first and the second storage unit. Method according to Claim 12 wherein the communication device is a communication device according to Claim 3 or one on Claim 3 claim 1, characterized by the step: - storing the hardware address of the dongle (10) on the third memory unit and storing the hardware address of the headset (1) on the fourth memory unit.

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