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Callandor, thanks for the info, interesting page. 
 
But I guess what I need is a better understanding of what to connect the transmit and recieve pins on the RS232 connector to the RJ45. 
 
I know on the RJ45, 1,2,3,6 are transmit and recieve, but since I can only pin to one pair, which do I use on the RJ45...1 and 3 or 2 and 6 etc.
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Callandor, thanks for the info, interesting page.

But I guess what I need is a better understanding of what to connect the transmit and recieve pins on the RS232 connector to the RJ45.

I know on the RJ45, 1,2,3,6 are transmit and recieve, but since I can only pin to one pair, which do I use on the RJ45...1 and 3 or 2 and 6 etc.

<div>
Here is an example from the connecttech site mentioned above. &nbsp;I would only add that I would buy a rj45 to db25 kit and build it to fit the sniffer spec. &nbsp;Keep in mind that on the RJ side pins 1/2, 3/6, 4/5 and 7/8 are paired. &nbsp;It is also a good idea to use pairs to carry the RX and TX signals. 
 
CB004 Pinout 
 
RJ 45 Jack &lt;-&gt; DB25F 
 
CTS 9 &nbsp;&lt;-&gt; 4 RTS 
 
DTR 7 &lt;-&gt; 8 DCD 
 
GND 6 &lt;-&gt; 7 GND 
 
TX &nbsp;5 &lt;-&gt; 3 RX 
 
RX 4 &lt;-&gt; 2 TX 
 
DCD 3 &lt;-&gt; 20 DTR 
 
RTS 1 &lt;-&gt; 5 CTS 

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Here is an example from the connecttech site mentioned above.  I would only add that I would buy a rj45 to db25 kit and build it to fit the sniffer spec.  Keep in mind that on the RJ side pins 1/2, 3/6, 4/5 and 7/8 are paired.  It is also a good idea to use pairs to carry the RX and TX signals.

CB004 Pinout

RJ 45 Jack <-> DB25F

CTS 9  <-> 4 RTS

DTR 7 <-> 8 DCD

GND 6 <-> 7 GND

TX  5 <-> 3 RX

RX 4 <-> 2 TX

DCD 3 <-> 20 DTR

RTS 1 <-> 5 CTS

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Hello all, 
 
I have an RS232 connector as follows: 
 
3 &gt;&nbsp;TD 
5 &gt;&nbsp;RD 
7 &gt;&nbsp;RTS 
9 &gt;&nbsp;CTS 
11 &gt;&nbsp;DSR 
12 &gt;&nbsp;RCVRDY - 
13 &gt;&nbsp;SIG GND 
14 &gt;&nbsp;DTR 
19 &gt;&nbsp;RESET - 
 
Now, I need to connect this to an RJ45 connector. I need pin 3 as Transmit and 5 as Receive from the RS232 to connect to the RJ45 so I can connect it to my sniffer to capture data. 
 
What pins do these connect to on the RJ45 connector? 

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Hello all,

I have an RS232 connector as follows:

3 > TD
5 > RD
7 > RTS
9 > CTS
11 > DSR
12 > RCVRDY -
13 > SIG GND
14 > DTR
19 > RESET -

Now, I need to connect this to an RJ45 connector. I need pin 3 as Transmit and 5 as Receive from the RS232 to connect to the RJ45 so I can connect it to my sniffer to capture data.

What pins do these connect to on the RJ45 connector?


RS232 to RJ45 Pinout

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