Question about Parallel 6 Foot DB9 Male - DB9 Female Null Modem Cable (NM96MF)
What 's the meaning of Db and the use of Db9-male/db9-female Cabl
The D is the shape of the connector when looked at it on it's side. The second letter (A,B,C,D,E) defines the amount of pins in the D connector. "DB9" is actually called DE by the standard and the E=9 pins. A=15, B=25, C=37, D=50, E=9. This standard was set in place by ITT Corp (Not the school) in 1952, and DE-9 connectors were used for tons of applications. (Machinery, Cars, etc). If you are only referring to the computer uses, the connector is widely known as RS-232 or a "Serial" port. These ports in computers were/are used for devices like early printers, scanners, networking hardware, or even as a method of connecting to the Internet at one point.
Posted on Dec 12, 2008
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Posted on Jan 02, 2017
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