Question about Parallel 6 Foot DB9 Male - DB9 Female Null Modem Cable (NM96MF)

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Meaning of Db and the use of Db9-male Cabl

What 's the meaning of Db and the use of Db9-male/db9-female Cabl

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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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1 Answer

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technicalsupport@prospectelectronics.com

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Does a de/db9 to dvi-d female adapter even exist? Is there a combination of adapters I might be able to use? I need an adapter with one female de/db9 to connect to my computer whose other end is a...


Looks like it does exist...

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380342442870&hlp=false

Are you sure its a DB9 and not an hd15?

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This IBM page seems to have the information needed to wire a DB9 to RJ11 for a cash drawer:
http://www-01.ibm.com/support/docview.wss?uid=pos1R1003522

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1 Answer

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1 Answer

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The jack in the UPS may be easily use a 8 pin RJ45 connector. It is easy to construct the cable by cutting off one end of a standard RJ45-8 ethernet cable and wiring the other end (three wires) into a standard DB9F female serial port connector.
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APC Part# - 940-0128A computer --------- Inside the Connector--------- UPS DB9-F | | RJ45 pin - signal | | Pin - Color | | 4 DSR ->|---+ | | | diode resistor | 6 DTR ->|---+---->|----///---o kill power | 8 Orange | | 1 DCD <-|----+ | | | | 2 RxD <-|----+----------------+--o low battery| 3 Brown | | | 7 RTS ->|----------+--///--+ | | | | | +--///--+ | | | | 8 RI <-|----+----------------+--o on battery | 2 Black | | | 9 CTS <-|----+ | | signal | 5 GND --|-----------------------o ground | 7 Red | | 3 TxD | | | chassis | Chassis/GND |-----------------------o ground | 4 Black | | | Not connected | 1, 5, 6, 9, 10 --------------------------------------

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2 Answers

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