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HeadsetRelated Patent Categories: Telecommunications, Radiotelephone System, Security Or Fraud PreventionHeadset description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070173227, Headset. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The invention relates to a communications unit constructed as a slave station which is adapted to be coupled to a plurality of master stations, said communications unit having a memory with a plurality of address fields in which one or more identification keys may be stored, said master station or stations having an identification cell with an identification key, wherein a coupling is established between one of the master stations and the communications unit in that the identification key of the master station is stored in one of the address fields of the communications unit. [0002] The system principles of a network including a headset as mentioned above are described e.g. in the published US Patent Application No. 2002/0061009 A1. [0003] Today, many mobile telephones use headsets in connection with a call and an answer to a call, as the user of the mobile telephone may hereby have his or hers hands free for other tasks during a call, which may be e.g. be the operation of a PC. [0004] Previously, the headset was connected to the mobile telephone via a wire, but after the provision of short-ranged communications connections it has become widespread practice to use these instead of a wired connection. [0005] The two most widely used wireless connections are the so-called Bluetooth and DECT standards, where Bluetooth has a range of about 10 metres, while the DECT standard has a range of about 150 metres. [0006] Known today are also wireless communications connections between public switched telephones and headsets, where the wireless connections are likewise based on Bluetooth and DECT. [0007] Such a connection between a public switched telephone and a headset is established by inserting an adapter circuit between the public switched telephone and the headset, said adapter circuit being connected by a wire to the public switched telephone and wirelessly to the headset. This adapter station may generally be configured as a holder for the headset and may contain a charging circuit for the headset. An example of such an adapter station may be seen in U.S. Design Pat. No. D 433005. [0008] To additionally improve the user friendliness of a headset in connection with a public switched telephone, an electrical circuit may be inserted which "lifts the receiver" at a call to the public switched telephone so that the user need not walk over to the public switched telephone to answer a call, but may do so directly from the headset. [0009] Another option is to add a mechanical lifting device to the public switched telephone to lift the receiver, e.g. if the given public switched telephone is not suitable for an electrical solution. An example of a mechanical lifting device is described in WO 99/49642. [0010] Although mobile telephony has gained widespread use and has clearly overtaken the public switched telephones in terms of growth, it is still so that the public switched telephone has a better sound quality in spite of considerable technical improvements of the mobile telephone technique. In addition, it is considerably cheaper to use the public switched telephone than the mobile telephone. [0011] Although many mobile telephone users have access to the public switched telephone and quite often are present in the vicinity of the public switched telephone, be it at home or at the office, it is so that the public switched telephone is frequently "forgotten" when a call is to be made. The reason for this may be of a purely habitual nature, but another factor coming into play is presumably that mobile telephones are equipped with more sophisticated call options and provide easier access to telephone numbers, as they are easy to store and find in the mobile telephone. [0012] In the light of this, it is desirable to be able to design a telephone system where all the advantages of the mobile telephone are incorporated, and where calls from the public switched telephone become a more natural act, while maintaining the same comfort. [0013] The object of the invention is achieved by a headset of the type defined in the introductory portion of claim 1, which is characterized in that at least one of the address fields of the communications unit is configured with an address field and an associated electrical lock, and that the address may be overwritten only if the master station has a unique identification key to open the electrical lock. [0014] Hereby, it is possible to establish an automatic coupling between the communications unit and the master station, as the address field in the communications unit is hereby reserved to be coupled only to a communications unit which has the unique identification key. [0015] When, as stated in claim 2, the fixed address field is predefined to be coupled only to specific master stations, it is advantageously ensured that only selected master stations having the unique identification key may be coupled to the communications unit. [0016] Expediently, as stated in claim 3, the coupling is established with a short-ranged communications connection of the Bluetooth type or of the DECT type, and additionally it is user-friendly if, as stated in claim 4, the communications unit is a headset. [0017] With a view to adapting a master station with an identification cell to a communications unit with as few electrical changes in the master station as possible, it is an advantage if, as stated in claim 5, the master station is an adapter master station having a unique identification key, and that the adapter master station is coupled, optionally wirelessly, to the other master station, preferably to a public switched telephone. [0018] It is an advantage to a user wishing to make call, e.g. by activating a button on the headset, if, as stated in claim 6, the adapter master station emits indication signals to the communications unit, allowing it be verified in the communications unit, e.g. via sound emission, whether it may be connected to the adapter master station, and if so a prioritized connection to the adapter master station is provided. [0019] This advantage is particularly pronounced if, as stated in claim 7, the master station is a public switched telephone, a mobile telephone or the like. [0020] To improve the user's comfort when connections are established to various master stations, it is an advantage if, as stated in claim 8, the adapter master station has a volume control unit to adjust the strength of a signal between the communications unit and a master station, e.g. a public switched telephone, relative to the strength of the signal between the headset and another master station, e.g. a mobile telephone. [0021] To improve the comfort, in the sense that it should be just as attractive to use the public switched telephone for calls as it is to use the mobile telephone, it is an advantage if, as stated in claim 9, the adapter master station has an electrical circuit or a mechanical structure adapted to lift or hang up the receiver of the public switched telephone, which provides the advantage that when receiving a call the user need not physically walk over to the public switched telephone. [0022] This advantage is enhanced additionally if,, as stated in claim 10, the adapter master station emits a sound at a call. [0023] If, as stated in claim 11, the adapter master station has a charging unit to charge the headset, the need of acquiring an independent charging unit is eliminated, and at the same time the user is currently made aware of the presence of the public switched telephone. [0024] The invention will now be explained more fully with reference to the drawing, in which Continue reading about Headset... Full patent description for Headset Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Headset patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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