What interface does the HP 721502-005 Nc3123 network adapter use?

The HP 721502-005 Nc3123 Fast Ethernet Card is described as a PCI Intel 10/100mbps Network Interface Card. This means it is designed for systems that provide a standard PCI expansion slot, allowing it to function as a PCI-based network adapter within compatible desktops or servers.

What Ethernet speeds are supported by the HP Nc3123 Fast Ethernet Card?

The HP Nc3123 Fast Ethernet Card PCI Intel 10/100mbps Network Interface Card supports 10/100 Mbps Ethernet operation. This allows the adapter to connect to both 10 Mbps and 100 Mbps network segments, providing compatibility with legacy Ethernet and standard Fast Ethernet LAN environments.

What type of connector does the HP 721502-005 network adapter use?

The adapter is categorized as a 10/100 Mbps RJ-45 network interface card. This indicates it uses an RJ-45 connector for Ethernet connectivity, enabling straightforward integration with standard twisted-pair copper cabling and common RJ-45-based patch panels and switches.

How is the HP Nc3123 PCI adapter classified in terms of product category?

The HP Nc3123 PCI Intel 10/100mbps Network Interface Card, with SKU 721502-005, is listed under Network Adapters and specifically as a PCI Fast Ethernet adapter with 10/100 Mbps, RJ-45 characteristics. This classification helps identify it as a Fast Ethernet PCI NIC for wired LAN connectivity.

How can procurement teams uniquely identify this HP Nc3123 network card?

Procurement teams can use the SKU 721502-005 together with the description HP Nc3123 Fast Ethernet Card PCI Intel 10/100mbps Network Interface Card. This combination of SKU and model name ensures that the exact PCI 10/100 Mbps RJ-45 network adapter is specified in purchase and inventory records.

721502-005 - HP 721502-005 10/100Mbps Fast Ethernet PCI card

Name: HP 721502-005 10/100Mbps Fast Ethernet PCI card
Brand: HP
SKU: 721502-005

721502-005 - HP 721502-005 10/100Mbps Fast Ethernet PCI card | US IT Hardware

Product overview

The HP Nc3123 Fast Ethernet Card PCI Intel 10/100mbps Network Interface Card, SKU 721502-005, is designed as a PCI network adapter for Fast Ethernet connectivity. It is categorized as a 10/100 Mbps RJ-45 adapter, supporting standard Fast Ethernet throughput over twisted-pair copper cabling. As a PCI-based solution, it fits systems that require a conventional PCI expansion slot for wired network access. The 10/100 Mbps capability allows operation with both 10 Mbps and 100 Mbps Ethernet networks, helping maintain compatibility across legacy and Fast Ethernet environments. With its RJ-45 interface, this adapter is suitable for typical copper-based LAN infrastructures. This product is positioned for environments that need a straightforward Fast Ethernet network interface card at the adapter level without additional integrated features specified. The Nc3123 designation identifies it within HP’s family of Fast Ethernet network adapters for client or server deployments that use PCI expansion.

HP Nc3123 PCI Fast Ethernet network adapter
Supports 10/100 Mbps Ethernet operation
RJ-45 interface for copper cabling
SKU 721502-005 for precise identification
Categorized as PCI Fast Ethernet adapter
Designed as a 10/100 Mbps RJ-45 NIC

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Featuring

Manufacturer part #	721502-005
Brand	HP
Condition	New
Model	Nc3123 Fast Ethernet Card PCI Intel 10/100mbps Network Interface Card
Bus Speed	33 MHz PCI
Form Factor	Full‑height PCI expansion card
Cabling Type	10BASE-T, 100BASE-TX
Product Line	NC3123
Product Type	Network Interface Card
Branding Name	HP
Bus Power Type	Powered from host PCI bus

Compatible systems

Confirmed as an HP NC3123 Fast Ethernet PCI network adapter with 10/100 Mbps RJ-45 connectivity; no manufacturer datasheet found.

Best for

Legacy PCI-based desktops and servers
Suited to systems that provide a standard PCI slot and need a dedicated Fast Ethernet network adapter using the HP Nc3123 PCI design and 10/100 Mbps capability.
10/100 Mbps Fast Ethernet LANs
Ideal for networks operating at 10 or 100 Mbps that require a compatible Fast Ethernet card supporting 10/100 Mbps over RJ-45 cabling.
RJ-45 copper cabling environments
Appropriate for installations using twisted-pair copper with RJ-45 connectors, as this card is categorized as a 10/100 Mbps RJ-45 network adapter.
Mixed-speed Ethernet infrastructures
Useful in environments where both 10 Mbps and 100 Mbps segments exist, since the adapter supports 10/100 Mbps Fast Ethernet operation.
Standard network interface card deployments
Fits use cases that simply require a PCI network interface card categorized as a Fast Ethernet adapter without additional advanced specifications.

Frequently asked questions

Details

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Boot ROM Support	PXE remote boot support (Intel‑based systems)

Bus Architecture	32-bit PCI

Bus‑Master DMA	Yes, 32‑bit bus‑master DMA

10 Mb/s Signaling	10BASE‑T Manchester encoding

100 Mb/s Signaling	100BASE‑TX MLT‑3 encoding with 4B/5B

Onboard Controller	Intel Fast Ethernet controller (Intel 82558 class)

Link Integrity Test	Yes, continuous link integrity monitoring

Auto MDI‑X Support	Requires standard straight‑through cabling (no explicit Auto‑MDI/MDI‑X listed)

Performance Features	Transmit and receive FIFOs, interrupt moderation, and bus‑mastering for reduced CPU utilization

Twisted Pair Support	Category 3, 4 or 5 UTP for 10 Mb/s; Category 5 UTP for 100 Mb/s

Managed PC Boot Agent	Compaq Remote Secure Boot (RSB) and Intelligent Manageability support

Duplex Modes Supported	Half‑duplex and full‑duplex

Supported Cable Length	Up to 100 meters on Category 5 UTP

IEEE Standards Supported	IEEE 802.3, IEEE 802.3u

Operating System Support	Microsoft Windows and several server operating systems (via Compaq/HP drivers)

Auto‑Negotiation Support	Yes, auto‑negotiates 10 or 100 Mb/s and half or full duplex

Receive and Transmit Queues	Separate transmit and receive FIFOs on the adapter

Half‑Duplex Collision Handling	CSMA/CD with backoff per IEEE 802.3

Media Type	Ethernet
Full‑Duplex Throughput	Up to 200 Mb/s aggregate at 100BASE‑TX full duplex
Maximum Data Transfer Rate	100 Mb/s

Networking Ports & Interfaces

Port Count	1 port
RJ-45 Ports	1
Network Type	Ethernet
PCI Interface	PCI
Connector Type	RJ-45
Ethernet Speed	10/100 Mbps
Interface Type	PCI
LED Indicators	Link and activity LEDs on bracket
Power Management	Supports advanced power management features via PCI bus
Ethernet Standard	Fast Ethernet
Interface Bus Type	PCI
Network Technology	10/100 Mbps Fast Ethernet
Ethernet Port Speed	10/100 Mbps
Twisted Pair Interface	RJ‑45 over UTP copper
Network Management Support	SNMP management via host system network stack

HP 721502-005 10/100Mbps Fast Ethernet PCI card