Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M1/00—Substation equipment, e.g. for use by subscribers
  • H04M1/02—Constructional features of telephone sets
  • H04M1/04—Supports for telephone transmitters or receivers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M1/00—Substation equipment, e.g. for use by subscribers
  • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
  • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
  • H04M1/6041—Portable telephones adapted for handsfree use

Definitions

• the present invention relates to a hands-free device for a telecommunication terminal having a base station and a mobile part / with a loudspeaker and a microphone.
• Such hands-free devices are used, for example, in the base stations of cordless telephones or in the form of car hands-free devices in connection with mobile radio telephones.
• the generic hands-free devices enable the user to conduct a telephone conversation, for example, while having both hands free.
• the base station In connection with cordless telephones, it is customary for the base station to have the loudspeaker and a microphone specially designed for hands-free operation. Although the sensitivity of the microphone integrated in the base station can be regulated, the distance between the user and the base station must not be too great, since otherwise the spoken word picked up by the microphone is difficult or impossible for the conversation partner to understand.
• the present invention is based on the object of specifying an improved hands-free device compared to the prior art.
• the speakerphone according to the invention builds on the prior art, that the microphone is subordinate to the handset at ⁇ .
• the microphone used for hands-free operation can be positioned in the immediate vicinity of the user, whereby communication problems can be avoided.
• the microphone usually assigned to the base station can be dispensed with, as a result of which the production costs of the base station can be reduced.
• the microphone can be a microphone integrated in the handset, preferably the microphone provided for the handset anyway. In this embodiment, the manufacturing costs are particularly low since only one microphone needs to be provided overall.
• the microphone is an external microphone, for example a microphone that can be connected to the handset via a connection cable.
• an external microphone could be in the form of a pluggable microphone, for example.
• the handset can be a cordless handset, in which case the base station is the base station of the cordless handset.
• the connection between the cordless handset and the base station of the cordless handset can be made, for example, in accordance with the DECT standard (Digital European Cordless Telecommunications) without this being a restriction.
• DECT Digital European Cordless Telecommunications
• a hands-free device with a microphone in the manner of a radio microphone is created.
• the loudspeaker is then preferably integrated in the base station of the cordless handset.
• the base station can also perform the function of an answering machine, so that the loudspeaker intended for the answering machine and that for the hands-free mode provided speakers can be formed by one and the same speaker.
• the handset is a handset that works according to a mobile radio standard.
• this mobile radio standard can be formed, for example, by the GSM standard (Global System For Mobile Communications), the UMTS standard (Universal Mobile Telecommunications System) or the AMPS standard (Advanced Mobile Phone Service).
• the base station is a car base station.
• a motor vehicle base station can be connected to the motor vehicle loudspeaker system and / or the car radio.
• the car speaker system can be used as the speaker of the speakerphone.
• embodiments are also conceivable in which the loudspeaker is integrated in the motor vehicle base station. This is particularly useful for portable car hands-free devices, which in many cases only have to be connected to the motor vehicle via the cigarette lighter.
• a hands-free algorithm which can be implemented by a combination of hardware and software, is preferably provided for operating the hands-free device.
• the hands-free algorithm runs in the base station and / or in the handset.
• the microphone is assigned a sensitivity setting intended for hands-free operation, this also being a special one regulated sensitivity setting intended for hands-free operation.
• the microphone can be assigned a sensitivity setting intended for handset operation, as is known from the prior art.
• Figure 1 shows an embodiment of the hands-free device according to the invention, realized by a cordless handset and an associated base station.
• FIG. 1 shows a schematic representation of a base station, generally designated 10, and of a cordless handset, generally designated 20.
• the base station 10 has an antenna 11, via which the base station 10 exchanges radio signals with the mobile part 20 and possibly other devices.
• the speaker 12 provided for hands-free operation is integrated in the illustrated embodiment in the base station 10 and is only indicated schematically.
• the base station 10 furthermore has a charging cradle 13, which is of no interest here, by means of which a rechargeable battery assigned to the handset 20 can be charged. If necessary, the charging cradle 13 has further contacts which interact with corresponding contacts of the mobile part, so that the mobile part 20 and the base station 10 can also exchange line-bound signals, for example for synchronization purposes.
• the mobile part 20 is arranged in the charging cradle 13 of the base station 10, it being clear that the mobile part 20 is not connected to the base station 10 via lines. which is therefore easily removable from the charging cradle 13.
• the handset 20 has a designated 22 shell, through which the user can hear the other party during herkömm ⁇ union operation, that is the non-hands-free operation.
• a display 23 is also provided, via which the user can be shown a large amount of information.
• the handset has a plurality of function or multifunction keys, of which only a few are designated by 24 for the sake of simplicity. Furthermore, some of the standard numeric / letter keys are provided with the reference number 25.
• the microphone 21 of the hands-free device according to the invention is formed by the microphone provided for the handset 20 anyway. In this embodiment, it is therefore possible to dispense with a microphone provided specifically for hands-free operation, which reduces the overall manufacturing costs.

Landscapes

• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Mobile Radio Communication Systems (AREA)
• Telephone Function (AREA)
• Telephone Set Structure (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7649195

Family Applications (1)

Country Status (3)

Cited By (3)

Families Citing this family (2)

Citations (8)

• 2000
  • 2000-07-17 DE DE2000134695 patent/DE10034695A1/de not_active Ceased
• 2001
  • 2001-02-28 AR ARP010100950A patent/AR027582A1/es unknown
  • 2001-06-26 WO PCT/DE2001/002339 patent/WO2002007417A1/de active Application Filing

Patent Citations (8)

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