A fax server is a set of software running on a server computer which is equippe with one or more fax-capable modems (or dedicated fax boards) attached to telephone lines (or, more recently, software modem emulators which use T.38 ("Fax over IP") technology to transmit the signal over an IP network). Its function is to accept documents from users, convert them into faxes, and transmit them, as well as to receive fax calls and either store the incoming documents or pass them on to users. Users may communicate with the server in several ways, through either a local network or the Internet. In a big organization with heavy fax traffic, the computer hosting the fax server may be dedicated to that function, in which case the computer itself may also be known as a fax server.