Compaq LP8000-F1 manual Glossary

Glossary 5

nm Nanometer. A unit of measurement equal to one billionth of a meter. 10exp- 9 meter.

Non-OFCNon-Open Fiber Control. GLMs that do not contain OFC control but still guarantee laser emission levels to be below Class 1.

OFC Open Fiber Control. A power monitoring/control system which continuously monitors the optical fiber link between two ports and prevents any laser emission from exceeding Class 1 levels in the event of a break anywhere in the path.

Optical Waveguide Dielectric waveguide with a core consisting of optically transparent material or low attenuation (usually silica glass) and with cladding consisting of optically transparent material of lower refractive index than that of the core. It is used for the transmission of signals with lightwaves and is frequently referred to as fiber.

PCI Bus # An internal Peripheral Connect Interface bus number in a computer. BCI Bus # is set by the computer system’s BIOS, and in most cases, the number is zero.

PCI Device # PCI slot number in a computer.

Point-To-Point (PTP) A connection established between two specific locations, as between two buildings.

Protocol A data transmission convention encompassing timing, control, formatting, and data representation.

SCSI Small Computer Systems Interface.

SelectID Used to configure Seagate drives. A matrix for relating ALPA (hex) numbers to SelectID (hex) numbers.

Shortwave Refers to length of the wave or frequency in the spectrum of light. 780 nm is the operating range of short wave lasers, while 1300nm describes the range of long wave lasers.

Simplex Cable A term sometimes used for a single-fiber cable.

Simplex Transmission Transmission in one direction only.