Abstract: A method of performance monitoring according to an embodiment of the invention includes, in a passive optical network (PON), sending system time of an optical line termination (OLT) to an optical network unit (ONU). The method further includes retrieving, by the OLT, network data collected at the ONU and associated with the sent OLT system time. The retrieved network data is stored at the OLT.

Abstract: A method of performance monitoring according to an embodiment of the invention includes, in a passive optical network (PON), sending system time of an optical line termination (OLT) to an optical network unit (ONU). The method further includes retrieving, by the OLT, network data collected at the ONU and associated with the sent OLT system time. The retrieved network data is stored at the OLT.

Abstract: Networks and networks for performance monitoring (PM) in a passive optical network, which contain at least one optical line terminator (OLT) and at least one optical network terminal (ONT), provide increased PM flexibility over traditional ONT management and control interface functionality. These networks and networks include setting a PM initialization time at the ONT, maintaining a base PM time at the ONT, zeroing an interval end time counter at the ONT and collecting a first set of PM data in PM bins for a specified PM time interval. The interval end time counter can sequentially increment after completing collection the first set of PM data. Once collection of the first set of PM data is complete and the interval end time counter has been incremented, these networks and networks can collect more sets of PM data in other PM bins for the PM time interval. Once PM data are collected, the OLT can retrieve the PM initialization time and the base PM time from the ONT, as well as the PM data from the PM bins.

Abstract: The size and power consumption of a ring trip monitor circuit, which performs one of the BORSHT functions of a telephone line card, is reduced by utilizing an operational amplifier with feedback resistors, a resistor network, and a ring signal generator that is only connected to the line when a ring condition is present.

Abstract: A number of fiber optic connectors are held by a connector clip that positions the fiber optic connectors so that the connectors can only be inserted into a corresponding number of receiving connectors in one way. In addition, the connector clip can only be assembled in one way to prevent the connectors from being improperly positioned within the connector clip.

Abstract: A differential pair of a first and a second transistor is used in a tone burst generator circuit for generating tone bursts for periodic pulse metering. The first transistor carries all of the current through the differential pair when no tone burst signal is to be generated. When a tone burst signal is to be generated, the base or gate voltage of the first transistor is reduced relative to the base or gate voltage of the second transistor, thereby causing the second transistor to conduct and the first transistor to be turned off. A continuous tone signal connected to a common current path through the differential pair is then coupled through the second transistor to a telephone connection in order to apply a tone burst signal to the connection.