| 摘要 |
A base unit; which is arranged to provide a communications connection between a plurality of fixed communications units (2, 6, 12, 13) and at least one mobile communications unit, such as a headset (10), is arranged to adapt the bandwidth of the communications connection between the fixed communications units (2, 6, 12, 13), which operate at various bandwidths, and the mobile units. The fixed communications units may be public switched telephones (2, 3), PC phones (6, 7), PDA units, etc. The invention makes it possible to optimize the sound quality in dependence on which type of fixed communications unit coupled to the mobile unit, and which task is to be solved. In one embodiment, it is possible to lock the bandwidth, e.g. to the lowest bandwidth, irrespective of which fixed communications connection is used.
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