摘要:
An assembly includes a first member having an inner surface and a second member having an outer surface. One of the two members has greater rigidity than the other member and at least one groove. The rigid member is partially received within the less rigid member and a coupling mechanism provides radially inward pressure to generate a seal between the inner surface of the first member and the outer surface of the second member. The groove includes an opening and a base each having a predetermined width. The predetermined width of the opening is generally less than the predetermined width of the base. The more rigid member may comprise an insert with a surrounding sleeve wherein the sleeve includes the grooves.
摘要:
A buried fiber optic cable system includes a distribution cable extending along a buried route, a splice enclosure connected to the distribution cable along the buried route, and a first sub-distribution fiber optic system extending along the buried route in a first direction away from the fiber optic splice enclosure. The first sub-distribution system may include spaced apart fiber optic taps along the buried route, a first sub-distribution fiber optic cable between the fiber optic splice enclosure and a first fiber optic tap, and at least one second sub-distribution fiber optic cable between adjacent fiber optic taps so that the first sub-distribution fiber optic cable and the at least one second sub-distribution fiber optic cable are arranged in end-to-end relation. The system may also or alternately include a similar lateral sub-distribution system.
摘要:
An optical network unit (ONU) includes an optical interface, a detector producing an output signal based on a characteristic of an optical input received via the optical interface, a radio-frequency (RF) interface, an opto-electrical (O/E) converter in a first path from the optical interface to the RF interface, an electro-optical (E/O) converter in a second path from RF interface to the optical interface and a controller operatively connected to the detector, the controller being configured to adjust an optical output of the ONU based on the characteristic, where the characteristic may be a level of the received signal. Also a method of adjusting an optical output of an ONU based on a characteristic of a received signal.
摘要:
An addressable optical network interface unit includes an optical input and a radio frequency output. The unit also includes an optical-to-electrical conversion circuit that converts optical signals received at the optical input into radio frequency signals, a directional coupler that is coupled to an output of the optical-to-electrical conversion circuit and a radio frequency receiver that is coupled to a first output of the directional coupler. The radio frequency receiver receives radio frequency signals input through the optical input. The unit also includes a controller that is coupled to the radio frequency receiver, and a filter circuit that is coupled to a second output of the directional coupler. The filter circuit includes multiple signal paths that filter out signals in different frequency ranges. Switches are provided that select one of the signal paths through the filter circuit. These switches are controlled in response to data contained in the radio frequency signal. The controller is configured to generate control signals that control the settings of at least some of the switches based at least in part on a filter control signal received through the optical input.