Best Serial Network Adapter

StarTech.com PCI Express Serial Card - 16 DB9 RS232 Ports - Low + Full Profile - Multiport Serial Adapter - PCIe Serial Card (PEX16S550LP)

Add 16 RS232 serial ports (DB9) to your low or full-profile computer through a PCI Express slot.
This 16-Port PCI Express Serial Card provides high-speed PCIe serial card with 16 DB9 RS232 ports from a single PCIe slot.
Multiport serial adapter card enables high-speed serial communication with data transfer rate up to 921.6 Kbps.
Compliant with PCI Express 1.0a/1.1 and compatible with 1x/2x/4x/ 8x/16x PCIe bus.
PCIe serial card / Multiport serial adapter card / Serial PCIe card / Serial expansion card / 16 port serial card / pci serial port / pcie serial card / PCI serial card / pci e serial card / pci express serial card.

MAXIMIZED PORTABILITY: This USB to serial RS232 adapter converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device.
BROAD COMPATIBILITY: Compatible with your USB 1.0 or 2.0 ports, this USB to RS232 converter works with your Windows, Mac or Linux system.
FAST TRANSFER SPEEDS: Experience fast speeds with this USB to DB9 serial adapter, supporting a Baud Rate up to 921.6Kbps.
PORTABLE DESIGN: Powered by a USB port, this USB to RS232 serial adapter cable features a lightweight design that conveniently fits into your carrying case, making it ideal for professionals on the go.
Install in almost any laptop or desktop computer through broad operating system compatibility, including Windows 8.
Communicate efficiently with connected devices with high-speed 921Kbps support.
Portable and lightweight, the USB-Powered design requires no additional power adapter.
USB to Straight-Through RS232 DB9 Serial Adapter.
Compatible with Windows 8, Mac OS X and Linux.
USB-powered - no external power adapter required.

Add a parallel port and two RS-232 serial ports to your PC through a PCI expansion slot.
2S1P PCI Serial Parallel Combo Card with 16550 UART.
PCI RS232 Serial Card plus Parallel Port.
2x Serial and 1x Parallel Adapter Card / PCI Serial/Parallel Card Adapter / Serial RS232 Adapter Card with Parallel Port.
All three ports share only one IRQ which minimizes the system resources required to operate the card.

Chipset: Intel 945 Express, Socket: LGA775, Other Features: Hyper-Threading Technology Support, Video: integrated Intel Graphic Media Accelerator 950 or PCI Express x16 graphics card.
Network: Integrated network interface with ASF 1.03 and 2.0 support as defined by DMTFCapable of 10/100/1000, Audio: AC97, Sound Blaster emulation, 16-bit analog-to-digital.
20-bit digital-to-analog, Type: 533-MHz and 667-MHz DDR2 SDRAM, Memory connectors: 4.
Memory modules supported: 256-MB, 512-MB, 1-GB, or 2-GB non-ECC, Minimum memory: dual-channel: 512 MB.
single-channel: 256 MB, Maximum memory: 4 GB, 1 x PCI.
1 x PCI Express x16, Serial: 9-pin connector.
16550C-compatible, Parallel: 25-hole connector (bidirectional), Video: 15-hole VGA connector.
Network adapter: RJ45 connector, USB: six USB 2.0–compliant connectors, Audio: three connectors for line-in, line-out, and microphone.

Connect to configure and remotely manage an RS-232 serial device over an IP network.

A simple, cost effective solution to process serial data communication between RS232 COM port devices over inexpensive cat5 cat6 RJ45 network cable.
DB9 female to RJ45 modular adapter converts DB9 female connector into an RJ45 female connector (DB9 female - RJ45 Female pinout: 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x).
A pair of DB9 to RJ45 socket coupler can be used a extender to extend rs232 serial signals up to 65ft.
Bi-directional DB-9 female to RJ-45 female converter comes with thumbscrews for easy and secure connection.
(Please be noted it's NOT 15 pin VGA video port) It's compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc..

Add one serial RS-232 port with com retention to any laptop or computer with a USB port.
Simple installation and operation with COM port retention provides robust serial connectivity for legacy devices with minimal hassle.
Easy plug and play installation with USB Powered device - no power outlet required.
Extensive list of compatible operating systems makes this device perfect for almost any RS232 application.
USB to Straight-Through RS232 Serial Adapter.
COM Port assignments maintained across reboot.
Powered by an available USB port - no external power adapter required.

Serial adapter allows a serial device to be connected to a USB computer.
Plug-and-play convenience:DB9 serial port is seen as a COM port by your computer, and is available for use by any program that accesses COM ports.
No need for an external power adapter:draws power directly from your computer via the USB connection.
DB9 serial port supports data transfer rates up to 230 Kbps:twice the speed of a standard built-in serial port.
LED shows adapter status and data activity at a glance.

Compatible devices: serial connected devices, serial network/monitoring equipment, data acquisition systems, POS terminals and industrial PCs, serial I/OUSB for add-on cards, I/O expansion for embedded systems.
2S + SPI (PCIe to dual serial and SPI) and LB (PCIe to local bus/ISA)-Like) are suitable for different types of applications..
AX99100 is a single-chip solution that can fully integrate PCIe 2.0 Gen 1 endpoint controller and SerDes with various peripherals, such as two/four high-speed serial ports, one parallel port, I2C master, high-speed SPI, local Bus (ISA-Like)) and GPIO..
Composed of four main configurations, such as 2S (PCIe to Dual Serial), 2S + 1P (PCIe to dual serial and single parallel),.
Single-channel (X1) PCI Express endpoint with integrated PHY controller.