Base station (or base radio station) is – according to the International Telecommunication Union's (ITU) Radio Regulations (RR) – a 'land station in the land mobile service.'A cell tower near Thicketty, South Carolina.Two GSM mobile phone base station towers disguised as trees in Dublin, Ireland.A base station disguised as a palm tree in Tucson, Arizona.Close-up of a base station antenna in Mexico City, Mexico. There are three antennas: each serves a 120-degree segment of the horizon. The microwave dish links the site with the telephone network.A professional rack-mount iDEN Base Radio at a Cell Site.Trunked systems have groups of base stations configured as repeaters. The center blocks with frequencies in this trunked block diagram each represent a base station.136–174 MHz US professional base station antenna examples.WiMAX base station equipment with a sector antenna and wireless modem on top Base station (or base radio station) is – according to the International Telecommunication Union's (ITU) Radio Regulations (RR) – a 'land station in the land mobile service.' The term is used in the context of mobile telephony, wireless computer networking and other wireless communications and in land surveying. In surveying, it is a GPS receiver at a known position, while in wireless communications it is a transceiver connecting a number of other devices to one another and/or to a wider area.In mobile telephony, it provides the connection between mobile phones and the wider telephone network. In a computer network, it is a transceiver acting as a switch for computers in the network, possibly connecting them to a/another local area network and/or the Internet. In traditional wireless communications, it can refer to the hub of a dispatch fleet such as a taxi or delivery fleet, the base of a TETRA network as used by government and emergency services or a CB shack. In the context of external land surveying, a base station is a GPS receiver at an accurately-known fixed location which is used to derive correction information for nearby portable GPS receivers. This correction data allows propagation and other effects to be corrected out of the position data obtained by the mobile stations, which gives greatly increased location precision and accuracy over the results obtained by uncorrected GPS receivers. In the area of wireless computer networking, a base station is a radio receiver/transmitter that serves as the hub of the local wireless network, and may also be the gateway between a wired network and the wireless network. It typically consists of a low-power transmitter and wireless router.