Abstract: A passive optical network power meter includes at least one memory and the computer program code configured to, with at least one processor, cause the passive optical network power meter to: determine an extinction ratio for the optical network unit based on a first plurality of consecutive optical transmissions indicative of a first logic value during a first time interval and a second plurality of consecutive optical transmissions indicative of a second logic value during a second time interval, the second time interval being subsequent to the first time interval; detect an average transmit power for the optical network unit based on a third plurality of consecutive optical transmissions during a third time interval, the third plurality of consecutive optical transmissions indicative of alternating first and second logic values; and identify an operating state of the optical network unit based on the extinction ratio and the average transmit power.

Abstract: An optical line terminal receives a sequence of optical power test transmissions from an optical network unit, wherein the sequence of optical power test transmissions includes a first plurality of consecutive optical transmissions, a second plurality of consecutive optical transmissions, and a third plurality of consecutive optical transmissions. The optical line terminal decides whether the optical network unit is malfunctioning based on an extinction ratio and an average transmit power, wherein the extinction ratio is based on the first plurality of consecutive optical transmissions and the second plurality of consecutive optical transmissions, and the average transmit power is based on the third plurality of consecutive optical transmissions.

Abstract: An optical line terminal receives a sequence of optical power test transmissions from an optical network unit, wherein the sequence of optical power test transmissions includes a first plurality of consecutive optical transmissions, a second plurality of consecutive optical transmissions, and a third plurality of consecutive optical transmissions. The optical line terminal decides whether the optical network unit is malfunctioning based on an extinction ratio and an average transmit power, wherein the extinction ratio is based on the first plurality of consecutive optical transmissions and the second plurality of consecutive optical transmissions, and the average transmit power is based on the third plurality of consecutive optical transmissions.

Abstract: A method for a first optical transceiver to range one of a plurality of second optical transceivers. The method my include broadcasting a first ranging grant, determining whether a runt response is received in a quiet window, changing one of the desired delay or a timing of the quiet window in response to determining that no runt response was received, repeating the broadcasting and the determining in response to determining that no runt response was received, identifying one of the unranged second optical transceivers in response to determining that a runt response was received, and establishing a ranged state with the identified unranged second optical transceiver. The first ranging grant including a delay request indicating a first delay before unranged second optical receivers respond. The quiet window is a time when no responses are expected from the second optical transceivers.