7E Communications

Glossary Terms Beginning U

0-9 : A : B : C : D : E : F : G : H : I : J : K : L : M

N : O : P : Q : R : S : T : U : V : W : X : Y : Z

Rack-height unit: a unit of measurement of height for equipment racks, where 1 U = 1.75 in (44.5 mm); also referred to as RU.
The point at which the ISDN telephone line terminates at a subscriber's premises.
Universal Mobile Telecommunication System: ETSI system.
Transmission from one origin to one destination only.
Earth station equipment to convert from IF to RF frequency: transforms the modulated IF signal from the modulator up to the desired transmit frequency by a process of frequency shifting or conversion.
Earth station used to transmit signals to a satellite; the transmit earth station-to-satellite connection.
Universal time co-ordinated: measurement of time, locked to an atomic clock reference, particularly used in space science and engineering; virtually the same as Greenwich Mean Time.