
Safe checkout
Secure payments
Fast dispatch
1–2 day handling
Free shipping
U.S. ground
Warranty & RMA
Support after delivery
J4121A - HP ProCurve 4000M Ethernet Switch Chassis with 10 Expansion Slots
- 8-Port 10/100 Base-T Ethernet Expansion Module.
- Designed for HP ProCurve 4000M chassis.
- Provides additional Fast Ethernet connectivity.
- Supports 10/100 Mbps auto-negotiation.
- RJ-45 connectors for standard Ethernet cables.
- Modular design for flexible network expansion.
- Enhances the port density of the ProCurve 4000M switch.
Was $217.47 · You save $32.32
Key specifications
See full specs ↓- Part Number
- J4121A
- Product Type
- Ethernet Expansion Module
- Number of Ports
- 8
- Port Speed
- 10/100 Mbps (Fast Ethernet)
- Connector Type
- RJ-45
- Compatibility
- HP ProCurve 4000M Chassis
Product details
The HP J4121A ProCurve is an 8-port 10/100 Base-T Ethernet expansion switch module for the HP ProCurve 4000M chassis. It provides additional Fast Ethernet connectivity to the modular switch system.
Technical Information
| Part Number | J4121A |
| Product Type | Ethernet Expansion Module |
| Number of Ports | 8 |
Additional Specifications
| Port Speed | 10/100 Mbps (Fast Ethernet) |
| Connector Type | RJ-45 |
| Compatibility | HP ProCurve 4000M Chassis |
Description
The HP J4121A is a specialized expansion module designed to enhance the capabilities of the HP ProCurve 4000M modular switch. This module adds eight Fast Ethernet (10/100 Base-T) ports to the chassis, providing increased network port density and flexibility for connecting end devices or smaller network segments. Each of the eight ports utilizes standard RJ-45 connectors, making it compatible with typical Ethernet cabling infrastructure. This module supports auto-negotiation for speed (10 Mbps or 100 Mbps) and duplex mode, simplifying network configuration and ensuring optimal performance with connected devices. Its integration into the ProCurve 4000M chassis allows network administrators to customize their switching solution based on specific port requirements, making it a cost-effective way to expand network capacity without replacing the entire switch. The J4121A is a key component for organizations looking to extend their network reach or add more connections to their existing ProCurve 4000M deployment. It represents a practical solution for increasing the number of devices that can be connected to the network, supporting a wide range of endpoints such as computers, printers, and IP phones.
Condition: Refurbished
Free U.S. ground shipping
Typically 1–2 days handling, 3–7 days in transit.
Purchase orders accepted
Government, enterprise, data center and small business.
Buying 10+ units?
Get volume pricing and availability for J4121A.





