Abstract: Techniques, apparatus and systems for optical communications, including fiber ring networks with protection switching to maintain optical communications when an optical failure occurs and to automatically revert to normal operation when the optical failure is corrected, fiber ring networks that provide a circulating optical probe signal at an optical probe wavelength within the gain spectral range of optical amplifiers used in a fiber ring network to detect an optical failure, and fiber ring networks that support broadcast-and-select optical WDM signals carrying communication traffic to the optical ring nodes without regeneration at each optical ring node and one or more overlaid in-band node-to-node optical signals carrying communication traffic with regeneration at each node.

Abstract: A cross tie bracket that is attachable to a rod and a building structural element. The cross tie bracket has a generally cylindrical body sized to receive the rod and a gusset disposed between the body and a base. The base has a series of apertures formed therein for inserting fasteners through the base into the building structural element, temporarily securing the cross tie bracket to the building structural element with screws, and for providing alignment of a temporary drill guide with the base. A first and second end plate are disposed adjacent to each respective end of the cylindrical body. Each of the end plates has a rod aperture sized to receive the rod. Accordingly, by inserting and securing the rod to the end plates, it is possible to attach the rod to the building structural element.