SCCT1023 Group A 6/9/09

Today we continue our chapter 6. It is about telephone and cellular phone system. telephone is a telecommunications device that is used to trsnsmit and receive sound (most commonly speech). Telephone has 2 types of information, they are signal and voice. Telephone switchboard was a device used to connect a group of telephone exchanges or pivate branch exchanges(PBXs). Cellular phone system uses a network of specialized base stations known as cell sites. Cellular network is a radio network made up of a member of radio celles each served by a fixed transmitter, known as a cell site or base station. After finish this chapter, lecturer said that our group discussion and presentation is start at next month. Then, there has a few classmates want lecturer to cancel class on next wednesday. But for me, it isn't matter, because i don't go anywhere, just at university to do my assignment.