Recent developments for the Upgrade of the LHCb readout system Cachemiche J P CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France Duval P Y CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France Hachon F CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France Le Gac R CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France Réthoré F CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France 2012 The LHCb collaboration has chosen to evaluate the ATCA architecture as form-factor for the LHCb readout system. A same board can satisfy all the requirements for data transmission, timing and fast control as well as slow control. First developments rely on a generic ATCA carrier board equipped with four dense AMC mezzanine able to interface a total of 144 bidirectional optical links at up to 10 Gbits/s. Early results and measurements will be presented. LHCbCERNTALK