Solved

How to make a 4 wire phone crossover cable

Posted on 2007-12-04
6
3,676 Views
Last Modified: 2013-11-09
Using a cat5 cable, terminating with rj11, what is the pin-out for each end of the rj11?
0
Comment
Question by:smcintire001
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 54

Expert Comment

by:b0lsc0tt
ID: 20404516
smcintire001,

I'm not exactly sure I understand what you are looking for but I am pretty sure it is in the diagram at http://www.hometoys.com/htinews/feb98/articles/moses/jacks.html .

Let me know if you have any questions or need more information.

b0lsc0tt
0
 

Author Comment

by:smcintire001
ID: 20404535
b0lsc0tt

no that does not help or answer my question
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20404564
If this is for phone why does it need to be a cross-over.
If it is for network you cannot do so with an RJ-11, it must be an RJ-45:
http://www.incentre.net/incentre/frame/ethernet.html
0
Building an interactive eFuture classroom

Watch and learn how ATEN provided a total control system solution including seamless switching matrix switch, HDBaseT extenders, PDU, lighting control to build an interactive eFuture classroom.

 

Author Comment

by:smcintire001
ID: 20404610
i need to hook up a device to a computer.

i got a serial to rj11 converter on both device's com1 ports.  but i ran a cat5 cable, not knowing that they sent me serial to rj11.  SO... i need to know what pinout to use so that these 2 devices talk.

this is what they told me:  "The connection between your computer and the controller is a four wire phone cable that does a crossover.  but you can use the cat5 to transmit. "
0
 
LVL 77

Accepted Solution

by:
Rob Williams earned 250 total points
ID: 20404812
That's a tough one. There are dozens of serial/RS-232 configurations however, a typical phone extension crossover is as simple as:
RJ-11 #1        RJ-11 #2
   pin 1    =>     pin 4
   pin 2    =>     pin 3
   pin 3    =>     pin 2
   pin 4    =>     pin 1

However, please do not accept this as correct for your purposes. You should verify with your supplier first, as the internal wiring of the serial adapter can be all sorts of configurations.
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20619623
Thanks smcintire001.
Cheers !
--Rob
0

Featured Post

NFR key for Veeam Backup for Microsoft Office 365

Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For many of us, the  holiday season kindles the natural urge to give back to our friends, family members and communities. While it's easy for friends to notice the impact of such deeds, understanding the contributions of businesses and enterprises i…
Most of the applications these days are on Cloud. Cloud is ubiquitous with many service providers in the market. Since it has many benefits such as cost reduction, software updates, remote access, disaster recovery and much more.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…
Suggested Courses

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question