4 Port Professional FTDI CHIP USB to Serial RS232 DB9 Adapter Converter Serial Cable 9-Pin Male to Male with Thumbscrews (W/Thumbscrews, 4 RS232 Port)

Purchased for my tech department employees to use with laptops. Works perfectly on Windows 10 and 7 also seems to work fine with CentOS and Redhat Linux. We work on a lot of EMC, NetApp, Cisco...equipment testing using serial ports and this is great and easy to stick in a laptop case. They can more easily multitask by running multiple serial connections to multiple systems using Putty or Hyperterminal, etc. I advise you determine what comport each serial connection "head" is assigned in device manager because it gets confusing. We mark each serial head with a number that corresponds to the com port assigned by OS. Once you install the drivers each "head" is assigned a comport that does not change.

There are times when I'm doing work on multiple headless Linux machines, because the session is killed when you disconnect from the serial port, I was having to do work on multiple node clusters one node at a time.Picked this up and now I'm able to work on four machines concurrently. Since the majority of the work is installing operating systems, screen isn't a viable solution. This product works well for that, or any other application where you need concurrent connections serially.

Works great. Prolific Driver disk provided helped to ease our setup. USB ports not labeled but can be identified using simple feedback/loopback connector. Would buy again.

All four ports were recognized on my Macintosh laptop without having to load drivers. I needed it to help set up and configure a set of Cicso switches and a NetApp cluster. I told several of my coworkers about it so they could get one for themselves!

When buying "generic" computer hardware like this I often wish someone would post some technical details so that I can make a better guess regarding whether or not it's going to work for me. I bought one of these for use on a RPi-based test fixture, and so far I have not run into problems. I did not need the driver disc at all -- just worked out of the box on Debian Linux (wheezy & stretch).`lsusb` outputs the following:Bus 003 Device 012: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) ICBus 003 Device 011: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) ICBus 003 Device 010: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) ICBus 003 Device 009: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) ICBus 003 Device 008: ID 1a40:0101 Terminus Technology Inc. HubThat is, it appears as a hub with with 4 FT232 converts connected. Here's the detailed output (lsusb -v -d 0403:6001):Bus 003 Device 012: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) ICDevice Descriptor:bLength 18bDescriptorType 1bcdUSB 2.00bDeviceClass 0 (Defined at Interface level)bDeviceSubClass 0bDeviceProtocol 0bMaxPacketSize0 8idVendor 0x0403 Future Technology Devices International, LtdidProduct 0x6001 FT232 USB-Serial (UART) ICbcdDevice 6.00iManufacturer 1 FTDIiProduct 2 FT232R USB UARTiSerial 3 AH05KCY0bNumConfigurations 1Configuration Descriptor:bLength 9bDescriptorType 2wTotalLength 32bNumInterfaces 1bConfigurationValue 1iConfiguration 0bmAttributes 0xa0(Bus Powered)Remote WakeupMaxPower 90mAInterface Descriptor:bLength 9bDescriptorType 4bInterfaceNumber 0bAlternateSetting 0bNumEndpoints 2bInterfaceClass 255 Vendor Specific ClassbInterfaceSubClass 255 Vendor Specific SubclassbInterfaceProtocol 255 Vendor Specific ProtocoliInterface 2 FT232R USB UARTEndpoint Descriptor:bLength 7bDescriptorType 5bEndpointAddress 0x81 EP 1 INbmAttributes 2Transfer Type BulkSynch Type NoneUsage Type DatawMaxPacketSize 0x0040 1x 64 bytesbInterval 0Endpoint Descriptor:bLength 7bDescriptorType 5bEndpointAddress 0x02 EP 2 OUTbmAttributes 2Transfer Type BulkSynch Type NoneUsage Type DatawMaxPacketSize 0x0040 1x 64 bytesbInterval 0Device Status: 0x0000(Bus Powered)When the device is connected, the following output appeared in /var/log/messages:kernel: [1328570.600195] usb 3-2: new high-speed USB device number 8 using xhci_hcdkernel: [1328570.740504] usb 3-2: New USB device found, idVendor=1a40, idProduct=0101kernel: [1328570.740513] usb 3-2: New USB device strings: Mfr=0, Product=1, SerialNumber=0kernel: [1328570.740518] usb 3-2: Product: USB 2.0 Hub [MTT]kernel: [1328570.741191] hub 3-2:1.0: USB hub foundkernel: [1328570.741226] hub 3-2:1.0: 4 ports detectedkernel: [1328571.048076] usb 3-2.1: new full-speed USB device number 9 using xhci_hcdkernel: [1328571.154958] usb 3-2.1: New USB device found, idVendor=0403, idProduct=6001kernel: [1328571.154967] usb 3-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3kernel: [1328571.154972] usb 3-2.1: Product: FT232R USB UARTkernel: [1328571.154976] usb 3-2.1: Manufacturer: FTDIkernel: [1328571.154979] usb 3-2.1: SerialNumber: AH05KEIJkernel: [1328571.158204] ftdi_sio 3-2.1:1.0: FTDI USB Serial Device converter detectedkernel: [1328571.158292] usb 3-2.1: Detected FT232RLkernel: [1328571.158742] usb 3-2.1: FTDI USB Serial Device converter now attached to ttyUSB0kernel: [1328571.256087] usb 3-2.2: new full-speed USB device number 10 using xhci_hcdkernel: [1328571.362674] usb 3-2.2: New USB device found, idVendor=0403, idProduct=6001kernel: [1328571.362684] usb 3-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3kernel: [1328571.362688] usb 3-2.2: Product: FT232R USB UARTkernel: [1328571.362692] usb 3-2.2: Manufacturer: FTDIkernel: [1328571.362696] usb 3-2.2: SerialNumber: A5062OYNkernel: [1328571.366032] ftdi_sio 3-2.2:1.0: FTDI USB Serial Device converter detectedkernel: [1328571.366124] usb 3-2.2: Detected FT232RLkernel: [1328571.366558] usb 3-2.2: FTDI USB Serial Device converter now attached to ttyUSB1kernel: [1328571.468091] usb 3-2.3: new full-speed USB device number 11 using xhci_hcdkernel: [1328571.594043] usb 3-2.3: New USB device found, idVendor=0403, idProduct=6001kernel: [1328571.594046] usb 3-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3kernel: [1328571.594047] usb 3-2.3: Product: FT232R USB UARTkernel: [1328571.594048] usb 3-2.3: Manufacturer: FTDIkernel: [1328571.594048] usb 3-2.3: SerialNumber: AH05KDAKkernel: [1328571.596873] ftdi_sio 3-2.3:1.0: FTDI USB Serial Device converter detectedkernel: [1328571.596890] usb 3-2.3: Detected FT232RLkernel: [1328571.597085] usb 3-2.3: FTDI USB Serial Device converter now attached to ttyUSB2kernel: [1328571.696086] usb 3-2.4: new full-speed USB device number 12 using xhci_hcdkernel: [1328571.803239] usb 3-2.4: New USB device found, idVendor=0403, idProduct=6001kernel: [1328571.803249] usb 3-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3kernel: [1328571.803254] usb 3-2.4: Product: FT232R USB UARTkernel: [1328571.803258] usb 3-2.4: Manufacturer: FTDIkernel: [1328571.803261] usb 3-2.4: SerialNumber: AH05KCY0kernel: [1328571.806660] ftdi_sio 3-2.4:1.0: FTDI USB Serial Device converter detectedkernel: [1328571.806745] usb 3-2.4: Detected FT232RLkernel: [1328571.807221] usb 3-2.4: FTDI USB Serial Device converter now attached to ttyUSB3

I needed several serial connections to setup debug of instrument. This unit came with updated drivers that installed on my Win 7 pc easily. I have been building my intercept cable and was finally able to stage test. The four ports were easy to assign. Shipping and packaging was fine.

I used this to connect 4 Barudan embroidery machines. It only uses 1 usb for 4 machines and it wont lose its com port setting like the Hawking adapters.

As an install tech you need quality reliable tools. This is one of those tools you can trust when you are deep in problem solving mode.