One of the most common ways of converting an analog signal to a digital signal. This is done by sampling the signal and coding the sample. At the receiving end, the interleaved signals are separated and converted back to analog. Phase Modulation One of the three ways of modulating or altering a signal so that it is able to carry information. The other two are amplitude and frequency modulation.
Phase modulation is used in high speed modems.
Polling Method of controlling terminals on a multi-point line by which a computer acting as master calls or polls each of the terminals in turn to find out if they have any data to send. This access method is used in star topology networks but is generally being superseded by the preferred interrupt method. Port A computer interface capable of attachment to another device, such as a modem for communicating with a remote terminal, or, if the port is within a hub, to a workstation. An addition to the Internet protocol suite to help connect devices where dissimilar transport protocols exist, for example for the transfer of routing the range of actions a user can perform on the network. Profile A set of parameters defining the way in which a device acts.