Patent ID: 7925156

Claim:
An apparatus for performing optical line diagnostics of a transmission line between optical network units (ONUs) and an optical line terminal (OLT) in a passive optical network (PON), the apparatus comprising: a phase error unit (PEU) for generating initial quality indicators and quality measures respective of input burst signals received at the OLT; a statistical accumulation block (SAB) coupled to the PEU and capable of performing statistical analysis on the quality measures by computing for each quality measure an average value, an absolute value, a minimum value, a swing value, and a maximum value, the SAB aggregates quality measures computed for each ONU in different times within a burst signal sent from the ONU, the quality measures include at least one of: an average sampling point (ASP), a number of detected narrow bits (NB), an average wave form (AWF), a jitter indication, and a duty cycle indication; a memory unit for storing statistics generated by the SAB; and a processor for processing statistics stored in the memory unit to generate a plurality of failure indications related to the optical line diagnostics.