duplex equipment
41EIA-485 — In telecommunications, EIA 485 (formerly RS 485 or RS485) is an electrical specification of a two wire, [ [http://www.chipkin.com/articles/rs485 cables why you need 3 wires for 2 two wire rs485 Why you need 3 wires for 2 (two) wire RS485] ] half… …
42Mobile radio telephone — systems preceded modern cellular mobile telephony technology. Since they were the predecessors of the first generation of cellular telephones, these systems are sometimes retroactively referred to as pre cellular (or sometimes zero generation)… …
43Orckit-Corrigent — Type Public (NASDAQ: ORCT)(TASE:  …
44Stainless steel — Iron alloy phases Ferrite (α iron, δ iron) Austenite (γ iron) Pearlite (88% ferrite, 12% cementite) …
45Cordless telephone — A cordless telephone with base. A cordless telephone or portable telephone is a telephone with a wireless handset that communicates via radio waves with a base station connected to a fixed telephone line, usually within a limited range of its… …
46Non-line-of-sight propagation — Non line of sight (NLOS) or near line of sight is a term used to describe radio transmission across a path that is partially obstructed, usually by a physical object in the innermost Fresnel zone. Many types of radio transmissions depend, to… …
47Ethernet over twisted pair — cable (upper) and 8P8C plug (lower) Ethernet over twisted pair technologies use twisted pair cables for the physical layer of an Ethernet computer network. Other Ethernet cable standards employ coaxial cable or optical fiber. Early versions… …
48Leased line — A leased line is a service contract between a provider and a customer, whereby the provider agrees to deliver a symmetric telecommunications line connecting two or more locations in exchange for a monthly rent (hence the term lease). It is… …
49Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… …
50Bilevel rail car — Double deck rail car operated by GO Transit, Ontario, Canada …
