English homework specialized electronics and telecommunications
English homework specialized electronics and telecommunications
Telecommunications (in European languages derived from the Greek tele means far communicare of Latin and means notice) described in a general way all forms of information exchange through a certain distance without having to carry this information to a specific way (eg mail). The visible signal was used in the 18th century as the expression system of the letters by hand or two flags placed in a certain position (semaphore) or optical machine press (heliograph) is an instrument communication by