Over 1 million tech questions and answers.

Usb Serial Port Adapter

Q: Usb Serial Port Adapter

i have a usb serial port adapter and i trying to figure out to set the usb jack on the desk top to be port1, port2, port3, or port4. if this is an easier process with xp i can change to the laptop

Preferred Solution: Usb Serial Port Adapter

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)

A: Usb Serial Port Adapter

hi,,, im not quite with you on this,,,, do you mean when you click on the "safely remove hardware" button on the notifacation area near the clock,,, where it says "safely remove mass storage device, D:E:F:G:" etc???

Read other 2 answers

I have 2 different adapters and neither one will work on my new computer with windows 8. Any fixes? Are there any adapters available that will work on windows 8?

A:USB to serial port adapter not working on Windows 8

Welcome to Tech Support Guy

What is the serial device you are trying to connect
What is the make of the USB to serial adapter

The problem is that the processor chip - YES they do have one, is not in many cases compatible with Windows 8, especially 64 bit, as of course the actual working of the adapter is achieved by connection to the USB port and then transmission of data from and to the USB hub.

Not knowing what you actually wish to connect your best first port of call is here to see what is on offer

scroll down for USB to serial or click USB on menu at top

Read other 3 answers

My PC doesnt have a parallel port. My printer is not USB-capable. So, I connected an adapter (9-pin plug in one end/25-pin plug other end) to the 9-pin serial port of the PC and plugged the printer cable in the adapter. On connecting, the PC communicated w/the printer because a paper came out with a single black square on top. But I could not get it to print again. I tried printing directly from CMD prompt to LPT1; then tried COM1 and COM2 - No luck. Any suggestions? The printer is a discontinued HP Laserjet 4000 - it may have a serial port, in which case I may go from serial to serial but, is that okay? Thanks for your help.

A:Serial Port Adapter for Parallel Printer Cable

Read other 8 answers

Need some advice a quick as possible.

Windows XP Pro
ofc had a built in serial port go bad, it was hooked to a charicter generator (don't no how to spell charicter) for a tv channel.
Installed a Controller Card with two serail ports PCI Multi I/O Controller Card, it didn't show up in the device manager was having problems getting the driver to work. says to load driver first then put in the pci card. Anyway it wouldn't work. The port that was built in (that went bad was on com 1) When the new card didn't work I used a usb with a serial adaptor and it went in fine and showed up in the divice manager and it said it was working and it started out on com 3, I no each time you plug the adaptor into a different usb port it goes to a different com port. That isn't a problem cause it would stay in the same port. Anyway device manager said it was working we changed the charicter generator to com 3 but it wouldn't work. We no the cables are good. I then got a PCI Card with one serial port instead of two and installed it and it show right up in the device manager and said it was working and I for get what comport it was on but changed it to com 1. that port didn't work either. Finally brought in another windows xp computer and hooked everhthing to it and it works. The xp computer I brought in had no serial port so used the same usb to serial adaptor that we had used and it work the first time. Show up in the device manager just like on the first comp... Read more

Read other answers

I'm looking for two drivers, and have run into a bit os a wall on the Lenovo driver website. - PCI Simple Communicator Port- PCI Serial Port Computer: Thinkcenter M58 8910 ARU.   Windows 7, 64 bit. I dropped a new hard drive and a PCI card into this machine, and everything looks good except that the PCI card is not recognized.  I see similar posts here, but none with solutions that work for my exact situation.  I'm not a tech guru, just a semi-educated user.  8^)  Any help is greatly appreciated! Thanks,Bob 


Go to Solution.

A:PCI Simple Communicator Port and PCI Serial Port drivers for M58

I have the same problem with M58P and Windows 8.1_x64.- http://support.lenovo.com/br/pt/products/desktops-and-all-in-ones/thinkcentre-m-series-desktops/thin...On page no information about the PCI Serial Port driver.Any suggestion?

Read other 4 answers

I have an amateur radio program installed on my desktop Dell PC runnning Windows 7. The program is correctly installed but when I try to communicate using the Internet I hear no sound from my speakers. I am connected to the other station but still no sound.
I get a message saying "cannot open serial port COM1. I would like to know how to convert a USB port to a Serial port. Please advise.
Thank you

Read other answers

Hi! There are some tablets I have my eye on, on ebay. But they've got connections that are made for a mac on them. I was wondering if there is an adapter out there that will let me connect these Wacom tablets to my PC. If they exist and someone can direct me to a place online that sells an adapter, that would be awesome! The sooner, the better please ! Thank you kindly!

A:Mac serial to PC serial adapter?

Read other 9 answers

Hello ,im using elitebook hp8530p and i cant find driver PCI serial port for windows 10 64bit.Any solution ? Thanks

Read other answers

Everytime I turn on computer its trying to install new hardware. "PCI SERIAL PORT" . Please help me to solve this problem.

A:Pci Serial Port

Give us as much computer info on your system as you can to enable us to help you.

Read other 2 answers

I have Palm VIIx. The hot sink was working ok before. But now it says "com1 port used by other programs and so it is not available. I am using windows xp.

A:Serial port

Go into add hardware scroll through to add another port, tell it hardware is there click next when you get to the applet that gives you the option to manually select click it then scroll trought list to find(CON & LPT) high light click next it will appear in the next section that is about all I can remember don't have an XP machine up right now.

Read other 1 answers

Hi Support, I have just upadted my windows to 10 (x64) and I have found PCI serial posrt is missing can not updated via windows when i went through the details got that : PCI\VEN_8086&DEV_2E17&SUBSYS_3034103C&REV_03PCI\VEN_8086&DEV_2E17&SUBSYS_3034103CPCI\VEN_8086&DEV_2E17&CC_070002PCI\VEN_8086&DEV_2E17&CC_0700 under Hardwearids, could you help me please!

Lion Lover

Read other answers

Why are new systems frequently being made without RS-232 serial ports?

A:New RS-232 Serial Port?

Read other 16 answers

Hello. I have a digital camera that must use a serial port. I can not get the comp. to recognize the camera. The software that came with the camera has been successfully installed (or so I'm told). I have two serial ports, one is 9 pin the other is larger.The camera requires the 9 pin connection. The 9 pin is on Com 1 and has the settings IRQ:4 Range:03F8-03FF. I am using a cable modem, and I do not have a dial up modem installed. I have checked the device manager and there are no exclaimation points or "X's" by Com 1. Device manager also reports no conflicts with Com 1. Any suggestions for resolving this problem would be appreciated.

A:serial port

Read other 10 answers

I have reviewed the other serial port malfunction thread, but it didn't seem to correct my problem. My computer will not recognize a device plugged into the serial port. I have confirmed the settings for the port which concur with COM 1, but I continue to receive a "device not connected" in the software.

A:Serial Port

Check to make sure the serial port is enabled in the bios. Sometimes, one will be disabled by default (to make us crazy), but it's easy to fix.

Read other 2 answers

How does a serial port look like?

A:Serial Port

Read other 7 answers

I am trying to connect my fiancee's palm pilot via serial port to my computer running windows XP. I have tried both serial ports on the back of my computer (one has a picture of a monitor and one has a picture of what reminds me of a lego Oh, and these are 9-pin ports I believe). Anyway, I can't get the palm pilot to sync with the computer. After looking at the FAQ section on Palm's website, it sounds like the reason it isn't working is because of conflicting COM/IRQ addresses.

Can someone please tell me the best way to see if there are any COM ports available on my computer and, if there's not, how to free one up? Thanks in advance!

A:Serial Port Help

If the plug has a pic of a monitor on it, the socket is probably for the onboard Video. I'm guessing that you are not in the right area for the serial ports?

Read other 3 answers

serial port disabled need to enable without using cmos (no password)

A:serial port

To enable the serial ports you are going to get the BIOS password or override it. What make and model PC is it? Also what BIOS and version is it? You can see them after powering on the PC while it is booting.

Read other 2 answers

Hi to all, should I install a serial port on the PC Pavilion? you know some working product? thank youDamiano

Read other answers

Hi - I am selling a sewing machine that has a serial port on the side but most people use USB sticks these days to transfer embroidery designs into their machines. The convertors I have seen have a male connection whereas I need a female connection. Does anyone know if there is a convertor that has a female connection? Thanks!

A:Help with serial to USB port

Hi judysue2, and welcome to TSG.

Are you talking about the USB connector or the 9 pin D-sub serial connector?

There are 9 pin serial cables that come in all combinations of male and female connectors on each end. There are also 9 pin D-sub "gender changer" blocks available.

EDIT: The serial port on your sewing machine is most likely designed to connect to a computer running specific downloading software for the machine. A general purpose serial-to-USB adapter would not have the built-in software needed to read the memory stick and send the data to the machine.

Read other 3 answers

So im going to try to explain this as well as i can.
I am running a windows 7 and I have a radio I would like to program. The main issue is that the program needed to program it is for DOS. So I installed DOS 6.22 On my VMWare virtual machine (VMware Workstation 8.0.0) and ran the program. Now the radio connects with a serial cable. but since I am using my laptop (lenovo ideapad z575) It does not have a Serial port. So I am using a USB to Serial Adapter (Trendnet TU-S9). But DOS will not recognize it.

What I am wanting to do overall is to make my windows 7 computer assume that my USB adapter is a physical Serial port so that I can go into VMware and attach a "physical" serial port to my VM. any Ideas or other suggestion i could try? thanks and sorry for the read.

A:USB serial port help

Did the trendnet USB to serial adapter come with drivers? Usually devices like that will. If not you can find them on the website most of the times. You may have to just install the drivers on your machine, and within the VM.

Read other 3 answers

I have a second older computer for my child, I do not have funds for purchasing new one for about a year. His mouse sucks. It's an old serial port mouse. There seems to be no PS2 port for a mouse. I bought an optical usb. I have a serial to ps2 connector, and a ps2 to usb, all plugged into one another lol. Have floppy for new optical. Reboot. No detection of a mouse. Go to run>A:/setup.exe, it goes to install but doesnt work as it does not detect a device. Do I need an additional driver for the serial to ps2? PLEASE tell me I can do this, I would really like to do this for my kid, if there is a way to config this, please help me? Thank you. He is on win98se. I sure hope I can do this! I would make him one happy kid for sure! ( I cannot stand that serial mouse either !! )

A:serial port to ps2 to usb please???

Read other 9 answers

i need the pci serial port driver for Elitebook 8460p -Windows 10 64bit

A:pci serial port

Hi: You need this driver for that device... This package provides the Intel Management Engine Interface (MEI) Driver for the supported notebook models and operating systems. The Intel Management Engine Interface enables communication between the host operating system and the Intel Management Engine firmware. ftp://ftp.hp.com/pub/softpaq/sp64001-64500/sp64098.exe

Read other 1 answers

On an Acer travelmate 518TX serial port I feed signals coming from a DSP. The signal is processed by a charting software that builds up the page line by line.
Happens that the image makes, at regular intervals a small jump to the left. So doing the final page is make up in stripes.
The software manufacturer states that some othe program is interrupting the incoming data stream from serial port, suggesting to disabling the Power Management System. I did it without any result.
My question is:
Can someone address me to what could be devices or software that commonly sample the serial port ? In order to investigate on how to stop this chopping activity.
Thanks for support

Manlio Laschena

mailto:[email protected]

Read other answers

I need to turn on my serial port and I don't know how to access the controls in the BIOS...
I have a Compaq Presario 5108US desktop. I have disabled the Windows XP "welcome screen" during reboot so that now I see the commands when my computer boots up. I don't know the proper keys to push to allow me to access the BIOS controls.

Can anyone help?

A:Serial port

Sorry I didn't get back to you on the other post, been crazy around here...

Anyway, press F10 repeatedly when your computer boots up to enter the BIOS. After you reach the BIOS main menu, see if you can find a menu or setting for Serial Port. It is probably under the menu, Integrated Peripherals, or a menu similar to that. There should be an "Enable/Disable" option.

Let me know if this works for you

Read other 2 answers


I just installed Windows 7 and updated all my drivers. I am missing two drivers, and I don't know what they are:

PCI Serial Port
PCI Simple Communication Controller

What exactly are these? I own a Lenovo X200 Tablet. Any ideas where I can find the drivers for these two things?


A:PCI Serial Port?H

Hi Akimatsu,

Have a look here
Lenovo Support & downloads - ThinkPad X200 Tablet support

These are for your model, download and try all the Vista drivers that you dont have or you are not sure of

I hope this helps

Read other 9 answers

could someone explain to me how to configure a serial port on the back of a laptop so i can connect a dds modem, always on ?

Read other answers

At work I was using a laptop with a serial port, which I used to communicate with an electronic device. The application used for the communication between the laptop and the device is designed to use a serial port.
The problem is I have now got a new laptop without a serial port (this seems to be the thing now!?) and I'm trying to use the USB port instead. My laptop doesn't like this at all!
Is there any way to configure the laptop to make the application think that it is talking to a serial port when it is in fact connected to the USB?
Any pointers anyone?

A:Serial port and USB

You can purchase a USB to Serial adaptor, I Googled it...

Read other 2 answers

A few days ago, I installed a PCI card in my computer and it has one serial and one parallel port.

When I checked to see if it is installed, the device manager says I have Com 1, Com 3 and Com 4. It seems like I should only have Com 1 (on motherboard) and Com 3 or Com 4.

Does this look right?

I am using Windows XP SP2 and my computer is a dual core pentium 4 with an intel motherboard.

A:Adding serial port

Read other 6 answers

I would like to hook up a camera to my PC.It requires a serial port.I have an Aptiva p2.
It has 1 on board serial port,Com2,which I am using for an external USR 56kmodem.
Com1 has installed a lucent winmodem,which I am not using but is still installed.
My pc documentation shows Com's 1-4 available.Coms 1 and 3 share IRQ 4 and Coms 2 and 4 share IRQ 3.
My bios info is;
PCI slots 1-3 enabled
Plug and Play =yes
PCI irq sharing=yes.
My dumb question is:Given the above,is there is a way that I can connect this camera.


A:Serial port question

Read other 6 answers

Whenever I try to access my serial port, my computer restarts. It does this for both com ports. OS is Win2k. Any ideas?

Read other answers

I have a weather staion that still uses serial connections. It isn't being reada by the software so I used the old hyperlink thingy to check the com port. The test didn't echo any of my characters so HyperLink says the ort is not functioning. Nah.

I don't think the test works well with anything but a modem. Is there any other test I can do in Win XP to check the COM1 port.

Sevice manager says that the port is fine and the BIOS is set to Auto to select the COM number. The software must be opening the port cause if I change the COM number there, it says it can't open the port. So the other times it's opening something but maybe not sending data to it.

I want to make sure the serial port is working before I go off and replace weather hardware that was good.

A:Testing a serial port with XP

You need to jumper pins 2 & 3 in the serial connector to get hyperterminal to echo characters. Here's a serial port loopback plug that you can fabricate to fully test the port. From the same site, here's some serial port test software.

Read other 1 answers

Does anybody know if a RS232 port is the same as a serial port?

A:RS232 the same as serial port?

Well, I think so. Just do some google image search on "Serial port" and see if that's you mean.

Read other 5 answers

Hi, I have a Elitebook 8560p and I am trying to resolve an issue with the serial port. The error I get is.. The drivers for this device are not installed. (Code 28)To find a driver for this device, click Update Driver. I have looked all over for a driver on hp.com and cannot find anything that relates to serials ports. What is the correct driver for this computer to resolve this issue?

A:PCI Serial Port Driver

HI. Try this: ftp://ftp.hp.com/pub/softpaq/sp64001-64500/sp64098.exe Regards.

? I do not work for HP, I volunteer.? To close the topic, check "accept as a solution" the correct answer or Thumb to say thank you.? I'm sorry but you do not answer questions privately.

Read other 3 answers

I have a toughbook CF-27 that I'm having a problem using the serial port with. It is Pentium 266 mhz with 192 meg running Win98SE.

I am running a DOS program that communicates through the serial port to a RS-232 to RS-485 converter and my signal is not communicating properly. I know its not the converter cause it works on various other equipment. I've tried testing the com port with various com port testers and all test pass. I tried loading problem straight from a dos boot disk and have had no luck. Checked the BIOS settings and everything seems to be correct. The UART on this MOB is the same style as my other laptop.

Not sure where else to check.

Any thoughts?

Thanks in advance

A:Serial Port Problem

Just because an adapter will work on one computer doesn't mean that it will on another.

Read other 1 answers

I have just received a palm pilot handheld for Christmas. I want to sync up to my PC, but simply connecting the handheld cradle to my serial port and installing the software is not enough.

I receive messages that my serial port is not available. How can I turn on the serial port on my PC? I run Widows XP Home.

I was once told to find the command for serial ports in the startup screen after a reboot. I have successfully changed the feature that only displays the Windows logo, and I can now read system commands at startup, but I don't see anything about serial ports...someone please help me!

A:Serial port connection

It is a setting that is in your BIOS that came disabled for some reason.

When your computer reboots and you see the text, you will see the computer running diagnostics on your computer (finding hard drives, verifying memory, etc...). On that first page, you have to press F1, DEL, ESC or some other key to enter your BIOS Settings. Once you enter it, you have to go into Port Management or Integrated Peripherals to enable the SERIAL Port.

If you can determine who made your motherboard, we might be able to determine the exact procedure on how to enable this for you.

Read other 4 answers

I have an IBM Thinkpad. When I try to hook up to my Fluke DSP 4000 The serial port seems to be inactive or locked. When I go to my device manager I can't find com port 1.
How do I get my com port 1 or my serial port back.
Try to be as basic as posible with your answer. My PC skills are very limited BUT if you give me detailed instructions I can work it out. Phiel !!

A:serial port missing

Read other 15 answers

HI, I'm looking for the PCI Serial Port Driver for a Compaq 8000 Uktre Slim Desktop PC running Windows 7 64bit OS.It's properties being "PCI\VEN_8086&DEV-2E17&SUBSYS-3648103C&REV-03"


Hi: Here is the link to the W7 driver you need for that device... This package contains the Intel Local Management Service (LMS) and Serial-over-LAN (SOL) support for Intel Active Management Technology (AMT) for the supported desktop models and operating systems. This software is part of the Intel Digital Office Initiative. ftp://ftp.hp.com/pub/softpaq/sp45001-45500/sp45367.exe

Read other 1 answers


I have an older program that I want to play networked, but the only choice for networking is to do it using a serial cable.

Since newer computers dont come with serial ports, I was wondering if there is a program that allows you to emulate a virtual serial port and pass it over to another computer via normal ethernet. The same program on the other computer will translate the information back into another virtual serial port?

Any Ideas?

A:Emulating a serial port

Read other 7 answers

Hi all, I'm quite desperate! In the middle of the sea with computer not working. I need to connect my laptop with windows 7 to a gps (Garmin 72H) to down?oad data. The Gps has a serial port and OFF COURSE my laptop not. I have a convertor COM-USB with driver but is not working. With XP I could create a virtual com port but I'm not able to do that with Windows7. When I connect the cable in Device manager in Other device a USB-serial controller is popping up with question mark. Usually there was an advanced bottom and from that I could create a virtual com. How can I do with Windows 7? Thank you very much for any suggestion.

A:GPS, serial port and windows 7

Marina, welcome to the forums
can you give details about the COM-USB converter? maybe we can help find the drivers, that seems to me would be the best solution?
Have you tried installing the ones you have in compatibility mode?

Read other 6 answers

I have a Sony PCG-FRV28 without a serial port. I have tried (2) different USB to Serial cables and (1) PCMCIA to serial card. The computer (running Win Xp Home) seems to recognize the serial adaptor, but the device I am trying to connect to (a touch screen display RS 232 connection via serial port) does not respond. I have tried to assign different COM prots to the serial connection but with no luck. The same cable works on an older Sony running Win 2000. The older Sony has a native serial port built in! I have already tried downloading the latest drivers for the serial cables with no luck.Any suggestions?

A:Serial port problem

I'd look for a PCMCIA serial board, the USB to serial stuff has been problematic for me in several cases. I still have a couple of those adapters that wouldn't work in the application I was attempting to use them.

Read other 1 answers

I have a Dell Latitude D620 with 2 USB ports and a Serial port. I need one of the USB ports to emulate a serial port. How do I do that?

A:USB Emulation of a Serial Port

I'm not sure that can be done or why one would want to do it.

If you could give more details someone else might have a idea.

What are you trying to hook to what and for what reason.

Read other 6 answers

Hi, I am new to this forum and I have a question when using bluetooth to connect an external device (Blueport XP). This external device requires a serial port for communication, but I don't see the bluetooth on my laptop had assigned a port.

I would like my bluetooth to work as the following mode:
When I search online, I find other people who faced my case have difference hardware (Left is others, right is mine):

They have the "Standard Serial over Bluetooth Link (COMXX)" under the Port catergory, while my "Device manager" don't have a such a Port category.

I think that is the reason when my external device can be successfully connected (using passcode), but still not assigned the com port and thus no later communication. (Left is others, right is mine):

I have checked my laptop configuration, my bluetooth is : Intel 7265 AC/B/G/N Dual Band Wireless + Bluetooth Version 4.0

So my question is: Does my bluetooth not support serial port profile (SPP)?
If it does support SPP, how can I make it work?

Thank you,

A:no serial port over bluetooth

Hmm, I don't have much information about this subject but perhaps your laptop needs to support the serial port and not the Bluetooth in particular. Not all laptops have a serial port. Sorry, can't provide anything more in this regard.

However, check How to Create a Bluetooth Virtual Serial Port | eHow. Maybe it will help.

Read other 4 answers


The Problem:

A friend of mine has some win32 and msdos applications that use serial
port communication with an external device, and a notebook that doesn't
have a serial port (unfortunately, many notebooks these days come
without serial ports). He got himself a USB to Serial Port Cable, and he
says that the win32 apps work just fine now, but the DOS ones don't.

I think (I'm not sure) those DOS applications don't run from an ms-dos
prompt under windows , but just in plain DOS mode. I'm trying to find out a
solution to use them under ms-dos.

I just want to find out if anyone knows any DOS driver for those USB to
Serial Port Converters / a method to get those dos applications running ...


A:USB to Serial Port driver for DOS

Just because you have a USB to serial converter cable/adapter doesn't mean DOS can work with the device. The device itself uses the USB protocol, so you need a DOS driver to "talk" to it. Scour the internet, I believe I saw one out there. search for - DOS usb

Read other 1 answers

i have upgraded to vista and did a clean install. Everything was ok until i was looking in system info. on problem devices it says this
PCI Serial Port
The drivers for this device are not installed.

on device manager there is a yellow box on pci serial port (other devices).on properties it says
manufactor unknown
location pci bus 6 , device 1 , funciton 0

The drivers for this device are not installed. (Code 28)

To reinstall the drivers for this device, click Reinstall Driver.

i did this it searches but cannot find the driver software. i dont have any of my original disks only vista and the drivers are not on there. even tryed on the web but no luck.

i have a emachines pc

OS Name Microsoft® Windows Vista™ Home Basic
Version 6.0.6000 Build 6000
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Manufacturer GATEWA
System Model D915GAG_
System Type X86-based PC
Processor Intel(R) Pentium(R) 4 CPU 2.66GHz, 2666 Mhz, 1 Core(s), 1 Logical Processor(s)
BIOS Version/Date Intel Corp. EV91510A.15A.0067.2004.0722.1717, 22/07/2004
SMBIOS Version 2.3
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United Kingdom
Hardware Abstraction Layer Version = "6.0.6000.16386"
User Name TonyRobbo-PC\TonyRobbo
Time Zone GMT Daylight Time
Total Physical Memory 2,294.18 MB
Availa... Read more

A:pci serial port code 28

Read other 10 answers

I have a 9 pin female serial port loopback tester, but on the other end of it, it is also a 25 pin loopback tester. Whenever I run our serial test, it fails the handshake portion of the test consistently. I have other serial testers, and they work fine, but I need this one to work properly. Is the loopback pinned out differently, or can I jump some of the connections to make it work? Any help is appreciated!


A:Serial Port testing

daves01902 said:

I have a 9 pin female serial port loopback tester, but on the other end of it, it is also a 25 pin loopback tester.Click to expand...

Are you trying to loopback test on the same connector or between two different connectors? You may have a loopback adapter/tester for testing between one serial port with a 9 pin plug and one with a 25 pin plug. I found a description of such a cable in some Sun Microsystems documentation here:


That same documentation has information on wiring 9 pin and 25 pin plugs for loopback testing on the same port.

Read other 1 answers

Hi All, I need to purchase a new Laptop, and I cant seem to find a new model that fits my needs.Does HP (or any other brand) make one with a native RS-232 serial port, preferably with an i7 processor 500GB HDD, 15"-17" FHD display 8GB-16GB memory  

Read other answers