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Product Description
Compaq NC3121 Fast Ethernet 10/100 PCI WOL NIC
By providing high performance and feature-rich functionality on both 10BaseT and 100Base TX networks, the NC3121 Fast Ethernet NIC offers businesses a robust, cost-effective NIC solution as their networks evolve.
The Compaq NC3121 network adapter is a device that provides connectivity between a computer system an an Ethernet Local Area Network (LAN). A computer system is any Intel/PCI based computer system with a compatible PCI slot, OS driver support and Ethernet hub connection. The Compaq NC3131 Fast Ethernet NIC is a high performance, upgradable NIC with two fully integrated 10Base-T/100Base-TX networking chips. The NIC supports emerging standards for system manageability and power management, such as ACPI.
The Compaq NC3131 NIC is a sophisticated 64-bit PCI component with enhanced scatter-gather bus-mastering capabilities. Its true 64-bit architecture enables it to perform high-speed data transfers on the PCI bus using four DMA channels. Its sophisticated microcode-based engine enables the controllers to process high level commands and perform multiple operations without CPU intervention. The NC3131 also operates in a standard 32-bit PCI slot and will support both 32-bit and 64-bit systems.
Product Features
Part numbers
Option Part #: 323551-B21
Spare Part #:  323553-001
Assembly #: 323557-001
Bus interface
PCI 64-bit or 32-bit, 33-MHz bus
IEEE 802.2, 802.3, and 802.3u
Power requirements
470mA@+5V typical
FCC Class B, CE Mark
Data transfer
32-bit bus-master PCI, 10 or 100Mb/s, Auto negotiating
Buffer memory
Communication processor
Intel 82558 chipset
Supported cabling
CAT 3, 4, 5 UTP (2 or 4 pair), Up to 100 meters (328 feet)
Standard Features
  • Wake on LAN (WOL) - Enables remote system power up and maintenance during non-work hours
  • Remote Wake Up (Magic Packet*) support in APM and ACPI modes
  • Full ACPI and system wake-up support, including wake-up from a device D3cold state (i.e., with system main power off).
  • LanDesk Service Agent v2.0 (LSA) boot code contained in on-board flash memory. (64Kb)
  • Glueless 32-bit PCI bus master interface
  • 208-pin SQFP (Intel 82558)
  • 82557-Style Chained Memory Structure streamlined for performance enhancement
  • Backwards compatible with 82557 software
  • Internal transmit and receive FIFOs (3 Kbytes each)
  • 6 KB total buffer memory - Allows low CPU utilization at high throughputs
  • Back-to-back transmit at 100 Mbs within minimum IFS
  • EEPROM support for configuration and customization feature section
  • ACPI and PCI Power Management standards compliant
  • ACPI "interesting" packet wake up support in D0 to D3cold low power states
  • IEEE 802.3u Auto-Negotiation for hardware selection of highest operating speed
  • Full or half duplex capable at 10 or 100 Mbps
  • IEEE 802.3x flow control support
  • Bay Technologies flow control support with the internal 100BASE-TX PHY
  • Test modes: Nand Tree and Test Access Ports
  • Adapter power provided by either the PCI bus, or the +5V standby supply, via three pin header
  • Management flexibility - Allows remote monitoring of the controller using Compaq Insight Manager, Compaq CNMS management software, or any other SNMP-compliant management solution
  • Compaq and Intel driver compatibility - Allows standardization on either Compaq or Intel Fast Ethernet NICs
  • Embedded Boot ROM support - Allows MIS personnel to remotely install and configure software
  • Fault tolerance, redundancy - Allows a second NIC to maintain an active link when a connection fails
  • Full-duplex support - Allows the Fast Ethernet NIC to transmit and receive data simultaneously for rates up to 20 Mb/s (Ethernet) or 200 Mb/s (Fast Ethernet)
  • Auto-negotiation to 10 or 100 Mb/s - Automatically connects the NIC at the highest common speed, without requiring configuration changes
  • PCI "plug and play" installation - Allows easy installation without conflict with other installed cards
  • Diagnostic LEDs - Allows easy installation and troubleshooting of the NIC
Operating system support
  • Microsoft Windows 95 & 98
  • Windows NT 3.5x & 4.0
  • Novell NetWare 3.12 & 4.x Server with ODI 16-bit and ODI 32-bit
  • IBM OS/2
  • MS-DOS / Windows 3.1/Windows for Workgroups with NDIS 2.0
  • SCO UNIX 5.x
  • SCO UnixWare 7.x
  • Linux.
Operating temperature
10° to 55°C/50° to 131°F
Shipping temperature
-20° to 65°C/-4° to 149°F
Operating humidity
Up to 85% (noncondensing)
Warranty information
The NIC is covered by the Compaq Lifetime Limited Warranty. Contact  Technical Support at  800-652-6672 for details. 
Link to Warranty Information
Click here for additional information regarding worldwide limited warranty and technical support available at:
Links to Product Specifications
Please visit website for overall information on HP Computer Corporation. For further information on HP products, contact HP Sales at 1-800-544-5255 or the HP Technical Support Center (post sales) at 1-800-652-6672. For customer support and information about HP and its products consult the Customer Support Center at 1-800-345-1518.


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