Importance

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Abstract

Modems (1) for coupling network-units (40) to devices (50) and comprising receivers (21) for receiving first data from the network-units (40) and transmitters (22) for transmitting second data to the network-units (40), which first data is destined for the devices (50) and which second data originates from the devices (50), are provided with detectors (31) for detecting parameters (p.sub.1) of the first data and adjustors (32) for, in response to detection results, adjusting parameters (p.sub.2) of the second data, to reduce the chance on network congestion networks (4). Calculators (33) calculate the parameters (p.sub.2) of the second data as a function of the parameter (p.sub.1) of the first data. The parameter (p.sub.2) of the second data is made substantially equal to the parameter (p.sub.1) of the first data between a minimum value (b.sub.min) and a maximum value (b.sub.max). The parameters (p.sub.1,p.sub.2) comprise a bitrate. The network-unit (40) forms part of an access network (4) and the device (50) forms part of a subscriber network (5).

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