Question

PCMCIA to Ethernet dongle

Asked by: MTec89_

I have done a decent amount of research myself, to know that I can make my own "dongle" for my 3Com Megahertz LAN 10/100 CardBus PCMCIA card for my laptop. the model is 3CCFE575BT. I have managed to desolder a Ethernet port off of a LAN card i do not use and hooked the 4 'full duplex' wires up to that port. The next step in my project is to solder those four wires directly to the card its self. now, i know the basics, the card does have the transformer, so it is not in the dongle like some manufacturers have done. What i need now is for a bit of help, in determining what pins on the card go to which twisted pair of wires. I do not have an ohm meter to test with so i have been trying to find a pin guide for my card and have been unable to do so. if there is someone out there that is able to find one that will tell me what wires from the ethernet cable go to which pin on the card, that's all I'm asking for. alternatively if someone has a dongle and can test it to find out the wireing and pin arrangements that will work too.

http://labs.cexx.org/dongle.htm

                                  
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Asked On
2009-09-24 at 18:59:55ID24760618
Tags

PCMCIA

Topic

General Laptop

Participating Experts
2
Points
380
Comments
8

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Answers

 

by: jmeyer17Posted on 2009-09-24 at 19:05:41ID: 25419639

try this site out to see if it is what you are looking for.

http://noteablecomputers.com/3com_dongles.htm

 

by: jmeyer17Posted on 2009-09-24 at 19:08:36ID: 25419647

Or are you going this route?

http://labs.cexx.org/dongle.htm

 

by: WolfherePosted on 2009-09-24 at 19:28:43ID: 25419698

Take a look at the pin assignment on a t568A (RJ45 pin assignment). http://www.utm.edu/staff/leeb/568/568.htm . Um..there are 8 wires and color coded. Am I missing something here? 3com has discontinued support for that card, but you can pick up another used for $3.00. There are pcmcia cards out there with ports to plug directly into (which is what you are trying to do here) no 'dongle' needed.

 

by: MTec89_Posted on 2009-09-24 at 19:32:35ID: 25419709

the first link is what i am looking for  for as far as information and the second link (and thats the same link i provided in my question) is what i am actually going to do with the information, however i still have not found the information im looking for, for my card's pin outs

 

by: MTec89_Posted on 2009-09-24 at 19:37:34ID: 25419723

wolfhere, i know that there are 8 wires but for simple lan, only four is needed (or thats what i have read) to send and receive data. even if there are more wires needed, thats not an issue as long as i can figure out what pins on the card go to what wires in the ethernet. i know i can get a new card and a new dongle but im not going that route as of now.

 

by: jmeyer17Posted on 2009-09-24 at 20:11:13ID: 25419813

it is only the four wires needed, 1,2,3 and 6.  Like the website suggests, trial and error, it is only two pair of wires.  you would probably spend less time using trial and error than searching all over for the pin out.

 

by: MTec89_Posted on 2009-09-25 at 18:22:56ID: 25428395

jmeyer17 i agree with the trial and error but i can not afford to possibly damage my card or router, or laptop for that matter. a misplaced 5 volt charge can wreak havoc on those electronics

 

by: MTec89_Posted on 2009-09-27 at 18:41:43ID: 25436323

i suppose this is as far as im going to get as far as help.

thanks guys.

20120131-EE-VQP-002

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