This compact, low-power, low-cost, advanced communication computer is based on an up to 266 Mhz 586 class processor. It has three 10/100 Mbit ethernet ports, up to 256 Mbyte SDRAM main memory and uses a CompactFlash module for program and data storage. It can be expanded using a MiniPCI type III board and a low-power standard PCI board. It has been optimized for use as a Firewall, VPN Router and Internet Gateway, but has the flexibility to take on a whole range of different functions as a communication appliance. The board is designed for long life and low power. The router is still available in small/medium volume, as board only or with a small metal box and various power supplies. With an HDD mounting kit you can install a 2.5" HDD on top of the board. Cases are available for inserting lan1621, lan1641 and Sangoma boards. Standard stock configurations: 4801-48: 233 Mhz CPU, 128 Mbyte SDRAM, 3 Ethernet, 2 serial, USB connector, CF socket, 44 pins IDE connector, 1 Mini-PCI socket, 3.3V PCI connector. Specifications: • 233 to 266 Mhz NSC SC1100 single chip processor • 32-256 Mbyte SDRAM, soldered on board • 4 Mbit BIOS/BOOT Flash • CompactFLASH Type I/II socket • UltraDMA-33 interface with 44 pins connector for 2.5" Hard Drive • 1-3 10/100 Mbit Ethernet ports, RJ-45 • 2 Serial ports, DB9 and 10 pins header • USB 1.1 interface • Power LED, Activity LED, Error LED • Mini-PCI type III socket. (t.ex for optional hardware encryption.) • PCI Slot, right angle 3.3V signaling only, dual PCI slot option planned. • 12 bit general purpose I/O, 20 pins header • Temperature and voltage monitor • Hardware watchdog • Board size 5.2" x 5.7" • Power using external power supply is 6-20V DC, max 15 Watt • Option for 5V supply using internal connector • Operating temperature 0-60 °C Software: • comBIOS for full headless operation over serial port • PXE boot rom for diskless booting • Designed for FreeBSD, NetBSD, OpenBSD and Linux • Runs most realtime operating systems