What is a Null Modem?

A Null Modem is a in particular designed cable that permits a “head-to-head” connection between two close by serial gadgets (Computers) via their communique ports (RS-232). Having a period drawback of up to 30 toes, it is maximum normally used to connect PCs inside the identical room for Gaming and other Functions including sending and receiving Files.

A null Modem is also referred to as a Crossover Cable.

What Does Null Modem Mean?

A null modem Makes use of a modem Protocol with Tx (transmit) and Rx (receive) strains most effective appropriate for serial connections. An RS-232 serial verbal excHange Interface is the same old communication channel via the facts Terminal gadget (DTE) — normally a Personal pc — and inFormation communications equipment (DCE), or the modem. Sending and receiving is finished by separate lines, each of which has a function that permits the communication. A DTE sends information on the road which is the receiving line for the DCE. Sometimes inside the absence of a DCE interface, the null modem makes the DTE interface of a PC look like a DCE interface with a View to facilitate communication.