26 Pin Serial Connector
Q: What is a null modem cable? A: A null modem cable connects to two standard serial ports for networking two computers together.
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Null modem cables enable direct data transfer with minimum setup. Null modem cables reverse the transmit and receive lines on each end of the cable to enable direct two-way communication. A null modem cable for PCs ordinarily follows the RS-232 standard and uses the same serial ports as RS-232 cables. Q: What is the difference between a DB15 and HD15 connector?
A: A DB15 connector has 15 pins arranged in two rows with one row on top of the other. The top row has 8 pins and the lower row has 7. A DB15 connector can be found on sound cards older AUI network cards and devices as well as legacy Macintosh® monitors. A: An HD15 connector has 15 pins arranged in three rows. Each row has 5 pins with the middle row slightly offset from the top and bottom. A HD15 connector is sometimes called HD DB15 or VGA connector.
The HD15 connector is a very common connector used mostly as a video interface for computers and monitors. It can also be found on HD displays and on older HD source devices such as satellite receivers and cable boxes. What is a Parallel Cable? A: A parallel cable is used to connect to the parallel ports on a computer and a peripheral device like a printer or external drive. IBM originally developed parallel ports and cables as a mean for connecting a printer to the earliest personal computers.