MONITORING METHOD FOR A PASSIVE OPTICAL NETWORK

摘要

The invention relates to a method for monitoring a passive optical network (1), PON, having a tree-like structure with a main line (3) and a plurality of branches (6.1 to 6,3), the method comprising the steps of: transmitting a wake- up signal (11) from an optical Sine termination (4), OLT, arranged in the main line (3) to a plurality of monitoring units (DPMI to DPM3) arranged in the branches (8.1 to 6.3), detecting the wake-up signal (11) and listening to information requests from the OLT (4) in the monitoring units (DPMI to DPM3) during a pre-defined listening time interval after the detection of the wake-up signal (11), transmitting an information request (12) to be received in the listening time interval from the OLT (4) to the monitoring units (DPMI to DPM3), and receiving the information request (12) in the monitoring units (DPMI to DPM3) during the listening time interval, one of the monitoring units (DPM2) which is addressed by the information request (12) transmitting a response message (13) back to the OLT (4).