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Today's access networks are still mainly based on copper cable infrastructure in the first mile. The geographic extension of conventional access service areas and with this also the structure of the access/aggregation network is mainly defined by the resistance of the copper lines - and thus the copper loop length - as well as by the switching capacity of the electro-mechanic telephone exchanges in...
This paper reports on a FTTH field trial with GPON technology in the network of Deutsche Telekom AG. Focus of this trial was to gain practical experience regarding: GPON technology, fibre installation in existing ducts with micro duct technology, fibre cabling in customer buildings and impact on operational processes.
Our own work on steroid compounds with defined conformation as chiral model compounds for investigations of chemo-, regio- and stereoselectivity of metal-mediated new reactions is reviewed. Reactions with nickelacycles, (π-allyl)zirconoxycarbene complexes, iron tricarbonyl complexes of dienes and 1-azadienes, the Ru-catalyzed synthesis of 1,3-dihydropyrrol-2-ones from 1-azadienes, the Pd-catalyzed...
Crosstalk is caused by electromagnetic coupling between neighbouring wire pairs in multi-pair copper cables. In this contribution the channel capacity of a twisted wire pair in an unidirectional driven multi-pair cable is calculated, where only far-end crosstalk is present. Thereby two scenarios are considered: Firstly the far-end crosstalk from neighbouring wire pairs is interpreted as disturbance,...
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