Seen two telecommunication towers used for cellular networks. on the right is not a lot of radio equipment is installed, but on the left looks so much radio equipment installed. Radio equipment used in pairs on the cellular tower is a microwave radio antenna, radio antenna GSM, 3G radio antenna.Number of installed devices is determined by the needs of a complex network to a cellular network, a tower may be able to contain a microwave radio links and three GSM antenna sector or also called end point site. If a tower has more than one radio link with a different direction, then the tower is called a nodal site. Nodal site can be interpreted as a meeting place for several radio link-end site, then passed to the link for backbone fiber optic or radio backbone.
