I have Belden 9539 (RS232 cable, 9 pin) already run in a building. Can I put an RJ45 connector on both ends of this cable, will it work? I'd just leave out the ground pin. I don't see why it wouldn't work, even if it's not the ideal solution. Any thoughts? This is for connecting the LAN port of a PTZ camera to the PTZ controller.
Confused about proper pinout with an RJ45 to DB9 adapter
Serial Console over RJ45 Ethernet-Patchpanels / RS232-Ethernet-Pinout?
programming - Serial Communication with rs232/485 and rj45 - Electrical Engineering Stack Exchange
Can I put RJ45 connectors on RS232 9-pin cable?
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Those plugs are most likely (hard to tell from a picture) Cisco console cable plugs.
They convert a DB-9 serial interface to a RJ45 receptacle , but NOT for use with a regular network cable. (They also exist in a DB-25 version.)
They are intended to use with a Cisco console cable (that has a RJ45 plug on 1 end and a DB-9 on the other) or a roll-over cable (RJ45 plug on both ends, but different pin-out than a network cable).
A Cisco console cable + a plug like yours connected to the other end make together a serial 3-wire null-modem cable.
A roll-over cable with 2 of these plugs (on each end) also makes a 3-wire null-modem cable.
That may be all you need. Provided that your lab-device needs a 3-wire null-modem cable, which is the most common case.
But some require a straight cable and in some (rare) cases you need a 5-wire null-modem (or straight) cable.
As modern computers, especially laptops, typically don't have a DB-9 serial port anymore, you may also need a USB to serial converter plug.
For short: There are a lot of variables here. Without more details about the devices involved and the exact nature of your plugs I can't get any more specific.
As Tonny wrote, that adapter is most likely a Cisco RJ45-to-DB9 converter, which is a purely passive adapter. The RJ45 side is not Ethernet, it's just RS232 on a different type of connector (Cisco devices used to have console ports with an RJ45 connector rather than the more common DB9 or DB25 connectors).
If you have an RS232 port on your laptop, then you just need a cable. While this was extremely common a couple of decades ago, nowadays I believe it's quite rare to find a laptop with an RS232 port.
So what you need instead is more likely an RS232-to-USB (aka serial-to-USB) converter/adapter.
Once you have that, you should have a new character device for the serial port somewhere in /dev (details may vary, but probably some kind of /dev/tty-something).
If you just want to capture the data from the serial port to a file, you can just cat /dev/serial_port_device_name >filename.
If you need to change serial port settings you can use stty but beware that you must keep the port open while you do it, otherwise the settings will reverse to defaults right away.
If you want something more foolproof, you can probably write a short script using the language of your choice, or they may be additional tools to manage that.
Alternatively there are devices with serial ports and Ethernet connections (you would then usually use telnet or netcat to connect to the serial ports and capture the data), but these would be more expensive, and only useful if you need to capture data from a larger distance.
I am attempting to control a device with RS232 commands.
The device has a control box that accepts RJ45 cable.
I am sending my commands via a Global Cache iTach WF2SL device which has a DB9 serial port.
I am attempting to connect the two devices using a Cat-6 T-568B cable, and a RJ45 to DB9 adapter.
The WF2SL pinout uses 2 - RX, 3 - TX, and 5 - Ground.
The control box expects what is in the image below:
Screen-Pinout462×336 35.3 KB
The adapter has the following pinout definitions:
Adapter Diagram831×771 47.9 KB
I’ve been trying to research this to determine the correct pinout but have become pretty much completely confused at this point.
I have ensured that the WF2SL is configured with the correct baud rate and additional settings.
I have tried quite a few different combinations of pinouts with no success.
Would anyone be able to dumb this down for me, and help me get the right pinout on the adapter, using the Cat-6 cable I have, to work with what the device is expecting?
Thanks in advance.
2 to 3, 3 to 2 and 5 to 5.
Hello Guys,
we recently purchased an Avocent ACS8000 terminal server/console server for an OOBM for one of our customers, to have remote connections to local devices serial console ports. (mainly Cisco switches)
http://42u.com/pdf/Manual_Avocent-ACS-8000_userguide_501a.pdf
We also have to reach switches in a different fire compartment. Therefor we have to use standard Ethernet patchpanels. So now we are wondering how to cable it up!?
The Avocent terminal server has RJ45 ports with RS232 pinout.
The Cisco switches also have RJ45console ports, which are supposed to be rollover?
Page 5: https://www.cisco.com/c/en/us/td/docs/security/asa/hw/maintenance/5585guide/5585Xhw/pinouts.pdf
So now I am wondering, do we just use rollover cables?
[Cisco Console Port] - [rollover cable] - [RS232 port on Avocent terminal server]
[Cisco Console Port] - [rollover cable] - [Ethernet patchpanel] - [Ethernet cable] - [RS232 port on Avocent terminal server]
Or do I use the included Cisco RJ45-DB9 console cable (which is supposed to be doing a rollover already) on the switches and then a DB9(male)-RJ45 adapter.
[Cisco Console Port] - [Cisco console adapter RJ45-DB9] - [DB9-RJ45 adapter] - [Ethernet cable] - [RS232 port on Avocent terminal server]
[Cisco Console Port] - [Cisco console adapter RJ45-DB9] - [DB9-RJ45 adapter] - [Ethernet cable] - [Ethernet patchpanel] - [Ethernet cable] - [RS232 port on Avocent terminal server]
I am sure, I am not the first with this question, so there has to be an answer for that somewhere out there, so I hope someone can me poke into the right direction.