Glossary

For radiation. Expressed in joules per square meter. Sometimes called irradiance.

A room in a building where antenna, public, and private network service cables can enter the building and be consolidated. Should be located as close as possible to the entrance point. Entrance facilities are often used to house electrical protection equipment and connecting hardware for the transition between outdoor and indoor cable. Also called an entrance room.

The location where telecommunications enter a building through an exterior wall, a concrete floor slab, a rigid metal conduit, or an intermediate metal conduit.

A glue that cures when mixed with a catalyzing agent.

A connector that does not require the use of epoxy to hold the fiber in position.

ELFEXT is the name for the crosstalk signal that is measured at the receiving end and equalized by the attenuation of the cable.

Cable or cable assembly used to connect telecommunications equipment to horizontal or backbone cabling systems in the telecommunications room and equipment room. Equipment cables are considered to be outside the scope of cabling standards.

Part of the cabling structure, typically between the distribution frame and the equipment.

A centralized space for telecommunications equipment that serves the occupants of the building or multiple buildings in a campus environment. Usually considered distinct from a telecommunications closet because it is considered to serve a building or campus; the telecommunications closet serves only a single floor. The equipment room is also considered distinct because of the nature of complexity of the equipment that is contained in it.

An optical amplifier that uses a length of optical fiber doped with erbium and energized with a pump laser to inject energy into a signal.

The process of detecting errors during data transmission or reception. Some of the error checking methods including CRC, parity, and bipolar variations.

The frequency of errors detected in a data service line, usually expressed as a decimal.

A local area network (LAN) architecture developed by Xerox that is defined in the IEEE 802.3 standard. Ethernet nodes access the network using the Carrier Sense Multiple Access/Collision Detect (CSMA/CD) access method.

A European trade organization that issues its own specifications and is a member of the ISO.

(1) In a fiber-optic coupler, the optical loss from that portion of light that does not emerge from the nominally operational pods of the device. (2) The ratio of the total output power of a passive component with respect to the input power.