Enterasys A4H254-8F8T

¥9,999.00

The Enterasys A4H254-8F8T is a Fast Ethernet switch from Enterasys Networks (later acquired by Extreme Networks), part of the A4 series of fixed-configuration switches designed for enterprise and industrial network deployments. The A4H254-8F8T provides a combination of 8 fiber ports and 8 copper (TX) ports, making it a flexible choice for access segments that need both fiber connectivity for distance or isolation and standard twisted-pair ports for end devices. As a member of the A4 series, the A4H254-8F8T builds on the established Enterasys switch architecture, supporting the stable connectivity that plant and building networks depend on. The switch is built for reliable continuous operation and is typically deployed at the access layer, connecting end devices and uplinking to higher-layer switches. For organizations maintaining legacy Enterasys network infrastructure, the A4H254-8F8T serves as an important spare, helping preserve network availability where replacement with current-generation platforms is not immediately practical.

Description

Product Parameters

Parameter	Specification
Brand	Enterasys Networks (Extreme Networks)
Model	A4H254-8F8T
Series	A4 series
Module Type	Fixed-configuration Fast Ethernet switch
Port Configuration	8 fiber ports + 8 copper (TX) ports
Network Role	Access-layer switching
Mounting	Rack or cabinet installation
Operating Environment	Enterprise wiring closet / industrial network cabinet
Certification	Per Enterasys / industry standards

Advantages and Features

Mixed port configuration: 8 fiber and 8 copper ports provide deployment flexibility.
Fiber connectivity: Suits distance, electrical isolation, or noise immunity requirements.
A4 series architecture: Builds on the established Enterasys switch platform.
Reliable continuous operation: Built for always-on network environments.
Rack-mount design: Fits standard network cabinet arrangements.
Legacy support value: Helps sustain existing Enterasys network infrastructure.

Application Cases and Fields

The A4H254-8F8T is used in applications including:

Enterprise networks: Access-layer connectivity in office and campus buildings.
Industrial networks: Mixed fiber and copper segments in plant and utility cabinets.
Building automation: Network segments for building systems requiring fiber links.
Utilities and transport: Network segments where electrical isolation is preferred.
Legacy network maintenance: Spare switch for existing Enterasys deployments.

Comparison with Competing Products

Compared with current-generation switches, the Enterasys A4H254-8F8T offers continuity for existing Enterasys network designs, avoiding the reconfiguration effort of a platform migration. Competing modern switches provide higher throughput and updated management features, but may require redesign of VLAN, spanning tree, and management configurations. Where the existing network is standardized on Enterasys equipment, the A4H254-8F8T minimizes disruption and preserves operational familiarity.

Selection Suggestions

Confirm the fiber and copper port mix matches your existing cabling requirements.
Verify fiber connector types and copper cabling category before ordering.
Review compatibility with your network management and VLAN configuration.
Consider stocking a spare A4H254-8F8T where legacy Enterasys equipment remains in service.
Consult Enterasys/Extreme documentation for firmware and configuration details.

Precautions

Install only with power disconnected and follow network cabinet safety procedures.
Observe ESD precautions when handling the switch.
Verify firmware version compatibility with your network design.
Confirm fiber connector types and cleaning procedures before connection.
Note that vendor support lifecycle for legacy platforms should be verified before relying on long-term availability.

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