1187-1 Larus Equipment Shelf

The Larus FT2ER Quad DS1 Fiber Optic Extension is a four channel multiplexer/demultiplexer that operates over single mode or multimode fiber optic cable. The FT2ER has a 1300nm laser diode transmitter, and PIN diode receiver. The system can operate over 30dB of fiber, splice and connector loss, with a 3.0dB power margin, or up to 39 miles (63.3km) of single mode fiber or 20 miles (33km) of multimode fiber.

An end-to-end system comprises the FT2ER circuit pack and mounting shelf at each terminal end and the interconnecting fiber. A fully protected system requires two FT2ER circuit packs at each terminal end. The circuit packs provide four transmit and receive DS1 ports for metallic connection to DSX-1 and/or customer equipment. The four T1 metallic inputs are multiplexed and output to a 1300nm fiber optic channel. The input from the fiber optic channel is demultiplexed and output to the four T1 metallic circuits.

A single FT2ER circuit pack provides power supply, fiber optic receiver/transmitter circuitry, four-DS1 interfaces, multiplexer/demultiplexer circuits and alarm interfaces. Front panel LEDs and pushbutton switches provide circuit status information. The FT2ER can be powered from central office battery, local -48 VDC power, or customer supplied optional 117 VAC to -48 VDC power converter.

The FT2ER circuit pack may be mounted in a 10 position 19-inch/23-inch rack shelf or a 14 position 23-inch shelf, for locating in a central office, controlled environment vault, outdoor pedestal, or customer equipment room. A two position shelf, providing four protected DS1s, is manufactured for customer premises applications, in wall or desk top mounting. All shelves are configured for fully redundant protected service.