Transcription: The modem is a device that allows your PC to talk over the telephone lines to other computers. They come in two types, internal, which is an expansion card, and external, which is a separate device that connects to your PC through a serial port. Although the internal modem does not physically connect to a serial port, it does use one. All modems have telephone jacks in the back that you connect a telephone cord to. Most modems are Hays compatible, which is an industrial modem communication standard. Different modems communicate at different speeds, which is measured in bits per second. This sp ...