Cellular Telephone
Operation of cellular radio transmission
is a radio signals wave. The traffic signs
must be located in an area known as the
Cell, which resembles a honeycomb
structure. The function or signal
transmission, each cell will have its own
antenna with a low power signal to
prevent interference between cell. The
communication will be made by the
contact between the antenna of each cell
with the handset, which will be Roaming
or transfer of contact between them.