Abstract: An optical line terminal (OLT) includes a basic wavelength channel unit and a corresponding extended wavelength channel unit. The basic wavelength channel unit is configured to support a basic wavelength channel and realize discovery and ranging of an optical network unit (ONU) on the basic wavelength channel; establish a first ONU management and control channel (OMCC) with the ONU on the basic wavelength channel, and in response to the ONU supporting an extended wavelength channel and being configured to be in a low delay mode, notify the ONU to switch from the basic wavelength channel to the extended wavelength channel through the first OMCC. The extended wavelength channel unit is configured to support at least one extended wavelength channel and establish a second OMCC with the ONU on the extended wavelength channel to transmit a low delay service.

Abstract: The disclosure provides a method and device for detecting rogue behaviour. The method comprises: for the upstream optical signal of each Passive Optical Network (PON) port, an Optical Line Terminal (OLT) constructs a short timeslot and transmits it via an optical transceiver; the OLT controls the optical transceiver to conduct a first Signal Detect (SD) sampling detection on the upstream optical signal according to the short timeslot to obtain a first detection result; the OLT judges, according to the first detection result, whether the upstream optical signal is valid; if so, the OLT constructs a long timeslot and transmits it via the optical transceiver, and controls the optical transceiver to conduct a second SD sampling detection on the upstream optical signal according to the long timeslot to obtain a second detection result; and the OLT determines, according to the second detection result, whether the current PON port is experiencing rogue behaviour.

Abstract: The disclosure provides a method and device for detecting rogue behaviour. The method comprises: for the upstream optical signal of each Passive Optical Network (PON) port, an Optical Line Terminal (OLT) constructs a short timeslot and transmits it via an optical transceiver; the OLT controls the optical transceiver to conduct a first Signal Detect (SD) sampling detection on the upstream optical signal according to the short timeslot to obtain a first detection result; the OLT judges, according to the first detection result, whether the upstream optical signal is valid; if so, the OLT constructs a long timeslot and transmits it via the optical transceiver, and controls the optical transceiver to conduct a second SD sampling detection on the upstream optical signal according to the long timeslot to obtain a second detection result; and the OLT determines, according to the second detection result, whether the current PON port is experiencing rogue behaviour.