half-duplex repeater
11Base station — The term base station can be used in the context of land surveying, wireless computer networking, and wireless communications.Land surveyingIn the context of external land surveying, a base station is a GPS receiver at an accurately known fixed… …
12Channel (communications) — Old telephone wires are a challenging communications channel for modern digital communications. In telecommunications and computer networking, a communication channel, or channel, refers either to a physical transmission medium such as a wire, or …
13Mobile radio — This article is about professional equipment. For mobile radios used in amateur radio, see amateur radio mobile operation. Mobile radio or mobiles refer to wireless communications systems and devices which are based on radio frequencies, and… …
14Walkie-talkie — A walkie talkie (more formally known as a handheld transceiver) is a hand held, portable, two way radio transceiver. Originally developed for the Canadian government during the Second World War by Canadian Donald L. Hings, similar designs were… …
15Network switch — A network switch or switching hub is a computer networking device that connects network segments. The term commonly refers to a multi port network bridge that processes and routes data at the data link layer (layer 2) of the OSI model. Switches… …
16Media Access Control — The Media Access Control (MAC) data communication protocol sub layer, also known as the Medium Access Control, is a sublayer of the Data Link Layer specified in the seven layer OSI model (layer 2). It provides addressing and channel access… …
17Reduced Media Independent Interface — (RMII) is a standard that addresses the connection of Ethernet physical layer transceivers (PHY) to Ethernet switches. It reduces the number of signals/pins required for connecting to the PHY from 16 (for an MII compliant interface) to between 6… …
18Carrier sense multiple access with collision detection — (CSMA/CD), in computer networking, is a network control protocol in which *a carrier sensing scheme is used. *a transmitting data station that detects another signal while transmitting a frame, stops transmitting that frame, transmits a jam… …
19EIA-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… …
20Physical Layer — NOTOC The Physical Layer is the first level in the seven layer OSI model of computer networking. It translates communications requests from the Data Link Layer into hardware specific operations to affect transmission or reception of electronic… …
