A short RS-232-C cable that connects two PCs so that they can communicate without the use of modems The cable connects the two computers' serial ports, and certain lines in the cable are crossed over so that the wires used for sending data by the other computer, and vice versa
A cable used to enable two computers to communicate with each other by emulating a modem The null modem cable is wired up so that the end connection from one to the other are: 2 connected to 3; 4 and 5 connected to 8; 6 connected to 20
A connection between two computers locally, causing the computers to act as if connected via a modem Generally used to transfer data from one machine to another
Cable adapter for V 24 links, used to link two data transmission installations, or two data installations The Null modem exchanges several lines, and thus creates a data installation from a data transmission installation, or vice versa
A cable in which the transmit and receive leads are crossed A null modem allows two devices to communicate over short distances (typically 50 ft or less) without using a modem
Sometimes you have two computers (DTEs) that you wish to connect directly to each other You have three choices 1 Think back to your high school gym class where they taught ballroom dancing If the number of boys did not exactly match the number of girls, some boys were given sashes, and told to dance backwards Similarly, you can get one of your computers to masquerade as a DCE 2 Buy a pair of modems and attach them back to back 3 Make a cable with wires crossed in a particular way so that it simulates two modems back to back This is called a null modem cable
A short serial cable that connects two personal computers so that they can communicate without the use of modems The cable connects the two computers' serial ports, and certain lines in the cable are crossed over so that the wires used for sending by one computer are used for receiving data by the other computer (Ref: Dyson, Dictionary of Networking)