Home Networking
Although the name modem is seldom used in this case, modems are also used for high-speed home networking applications, especially those using existing home wiring. One example is the G.hn standard, developed by ITU-T, which provides a high-speed (up to 1 Gbit/s) Local area network using existing home wiring (power lines, phone lines and coaxial cables). G.hn devices use orthogonal frequency-division multiplexing (OFDM) to modulate a digital signal for transmission over the wire.
The phrase "null modem" was used to describe attaching a specially wired cable between the serial ports of two personal computers. Basically, the transmit output of one computer was wired to the receive input of the other; this was true for both computers. The same software used with modems (such as Procomm or Minicom) could be used with the null modem connection.
Read more about this topic: Modem
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