... A new technological vision on the future of the VLBI backend area let envision a fully digital implementation of what was until now performed in the analog domain. ... Very Long Baseline Interferometry (VLBI), radio astronomy, VLBI backend systems, VLBI backend area, domains transition point, radio observatories digital technology, data handling process, signal path, RFI and calibration effects, DSP algorithms, sensitivity of the observatories, global applications. ...