Description
The Enterasys A4H124-24TX (SKU: P0973JM) is a high-performance, stackable Fast Ethernet switch from the Matrix A4 family. It is designed to provide high-density wire-speed switching for enterprise edge applications, offering robust Quality of Service (QoS) and security features in a compact 1U form factor.
Product Parameters (Datasheet)
- Model Number: A4H124-24TX
- Part Number: P0973JM
- Total Ports: 28
- Fixed Ports: 24x 10/100Base-TX (RJ45)
- Uplink Ports: 2x 10/100/1000Base-T (RJ45) and 2x 1G SFP (Combo ports)
- Switching Capacity: 12.8 Gbps
- Forwarding Rate: 9.5 Mpps
- Stacking Support: Yes (Up to 8 units via dedicated stacking ports)
- MAC Address Table: 16,000 entries
- VLAN Support: Up to 4,094 VLAN IDs (802.1Q)
- Power Supply: Internal AC (90-264 VAC)
- Mounting: 19-inch rack-mountable (1U)

ENTERASYS A4H124-24TX P0973JM

ENTERASYS A4H124-24TX P0973JM

ENTERASYS A4H124-24TX P0973JM
Country of Origin
This networking hardware was engineered and manufactured in the United States (with global assembly components) by Enterasys Networks (now Extreme Networks).
Application Fields
The A4H124-24TX is commonly deployed in environments requiring reliable edge connectivity:
- Enterprise Office Networks: Providing desktop connectivity for workstations, IP phones, and printers.
- Educational Institutions: Serving as the access layer switch for classrooms and computer labs.
- Industrial Control Rooms: Linking HMI stations and PLCs to the plant-wide Ethernet backbone.
- Government Facilities: Utilized in secure environments due to Enterasys’ advanced policy-based security features.
- Legacy System Support: Maintaining older 10/100 Mbps infrastructure that requires managed switch capabilities.
Product Usage Instructions
- Rack Installation: Secure the module in a standard 19-inch rack using the provided mounting brackets. Ensure the ventilation fans on the sides are not obstructed.
- Initial Configuration: Connect a standard DB9 console cable to the front-panel console port. Use a terminal emulator (9600 baud, 8-N-1) to access the Command Line Interface (CLI).
- VLAN Setup: Assign ports to specific VLANs to segment traffic. Use the
set vlancommands to isolate guest traffic from internal business data. - Stacking: If using multiple units, connect the stacking cables to the rear stacking ports before powering on. The stack will automatically elect a manager (Master) switch.
- Firmware Updates: Periodically check for updated firmware images via the Extreme Networks support portal to ensure the switch has the latest security patches and feature sets.
Product Technical Description
Technically, the A4H124-24TX is a Layer 2 switch with basic Layer 3 routing capabilities (Static Routing). It utilizes Enterasys’ signature Policy-Based Architecture, allowing administrators to define security rules based on user identity or device type rather than just port number. The 24 ports of 10/100 provide reliable “Fast Ethernet” speeds, while the two Gigabit copper and two SFP ports provide flexible high-speed uplinks to a core switch or server. The “H” in the model name typically indicates “High-Feature” or “High-Density” hardware revision within the A4 lineage.
Q&A (Common Questions)
Q: Does this switch support Power over Ethernet (PoE)? A: No, the A4H124-24TX is a non-PoE switch. For PoE applications, the A4H124-24P is the corresponding model.
Q: Can I use third-party SFP modules in the uplink ports? A: Enterasys switches are generally compatible with standard MSA SFPs, though using genuine Enterasys/Extreme modules is recommended for guaranteed performance and diagnostic reporting.
Q: How do I factory reset the switch if I lose the password? A: You must interrupt the boot sequence via the console port and use the boot menu to clear the configuration and password files.
Q: Is this switch still supported by the manufacturer? A: The Matrix A4 series is considered a legacy product. While it is highly reliable, support is primarily found through third-party hardware specialists and the Extreme Networks archive.
Similar Model Recommendations
- Enterasys A4H124-24P: PoE-enabled version of this switch.
- Enterasys A4H124-48TX: 48-port high-density version.
- Extreme Networks C5-Series: Modern stackable successor to the A4 series.
- Enterasys B5-Series: Higher-performance Gigabit edge switch.
- Enterasys A2-Series: More compact, entry-level managed switch variant.
For technical documentation or to inquire about current stock for the Enterasys A4H124-24TX and other Matrix series networking spares, please contact our team.

