| 摘要 |
Telephone sets are known which have a handset with internal electro-acoustic transducers, a handset support and additional electro-acoustic transducers disposed outside the handset for hands-free operation. In order to achieve flexible and low-cost fitting of telephone devices of this type, the invention proposes to dispose the hands-free device in the handset. A hands-free device can be retrofitted in this way by anone without interfering with the communications device, simply by exchanging the handset. |
