Dynamic line management

摘要: A management device (100) for use in an access network (10, 19, 20, 30, 40, 100) including a plurality of data connections (18, 20) between end user devices (10) and aggregation transceiver (20) where the are aggregated onward connection through (20, 30,40), storing association with each Dynamic Line Management, DLM, profile which specifies set values parameters associated respective connection, together stability level specifying desired connection. The comprises means receiving monitoring over predetermined period time; selecting DLM to be applied dependence on both stored connection; requesting OSS system apply selected selection disregards any resynchronisations or errors estimated have occurred as result area wide event such thunderstorm. It performs this estimation by detecting large number retrains occurring within short test period.