Description

The ENTERASYS A4H124-24FX P0973JN is a high-density, hardened industrial Ethernet switch designed for mission-critical network infrastructures in extreme environments. As part of Enterasys’ (now Extreme Networks) A-Series, this 26-port managed switch combines 24× 10/100BASE-TX PoE+ ports with 2× 100BASE-FX multi-mode fiber uplinks, delivering robust connectivity for OT/IT convergence. Engineered to exceed IEEE 1613 Class 2 and IEC 61850-3 standards, the ENTERASYS A4H124-24FX P0973JN operates across -40°C to +75°C with dual 48–57 VDC inputs, ensuring reliability in electrical substations, rail systems, and industrial automation. Its non-blocking 12.8 Gbps switching fabric supports deterministic data transmission for real-time protocols like PROFINET IRT and GOOSE messaging, while 802.3at PoE+ (30W per port) powers IP cameras, wireless APs, and sensors without separate power runs.

Featuring IP30-rated housing, 50g shock resistance, and conformal-coated PCBs, the switch withstands harsh conditions in mining, transportation, and energy sectors. Advanced Layer 2 capabilities include ExtremeXOS®-enabled Precision Time Protocol (PTPv2) for μs-level synchronization, hardware-based QoS for traffic prioritization, and MPLS support for secure network segmentation. The ENTERASYS A4H124-24FX P0973JN integrates with Extreme’s Fabric Connect for automated topology management, reducing deployment complexity in large-scale industrial networks.

ENTERASYS A4H124-24FX P0973JN

Technical Specifications

Main Features and Advantages

Industrial Resilience:

Conformal coating protects against humidity, salt fog (ISO 9227), and corrosive gases

50g shock/10g vibration immunity (IEC 60068-2-27/64)

Redundant power with <10ms>

Advanced PoE Management:

Per-port 802.3at (30W) for PTZ cameras, APs, and industrial sensors

Automatic PD classification and priority-based power budgeting

Remote power cycling via CLI/SNMP

Deterministic Networking:

Hardware-based PTPv2 (±1μs accuracy) for synchrophasor networks

802.1p QoS prioritizes OT traffic (e.g., PROFINET, Modbus TCP)

Broadcast storm control and loop protection (STP/RSTP)

Security & Manageability:

MACsec-ready fiber ports for encrypted uplinks

Port security with 802.1X/MAB authentication

Extreme Fabric Connect for zero-touch provisioning

ENTERASYS A4H124-24FX P0973JN

Application Field

The ENTERASYS A4H124-24FX P0973JN excels in:

Smart Grids: IEC 61850-3-compliant substation LANs for protection relays and meter data

Rail Systems: Onboard train networks (EN 50155) for passenger Wi-Fi and CCTV backhaul

Industrial Automation: Machine vision cell connectivity with PoE+ cameras and PLCs

Oil & Gas: Offshore platform safety systems with H₂S-resistant components

Mining: Ventilation control and personnel tracking in Zone 2 hazardous areas

City Infrastructure: Traffic management systems with -40°C cold-start capability

Related Products

ENTERASYS A2H254-16: Gigabit switch with SFP uplinks

ENTERASYS PS48-2A: 48V DC redundant power supply

EXTREME ISW-2402G-POE+: Successor model with Layer 3 features

ENTERASYS I-Series ISW-802F: Compact 8-port PoE switch

ENTERASYS SSA-SFP-1G-SX: 550m multi-mode SFP module

Installation and Maintenance

Pre-installation preparation: Verify PoE load calculations to avoid power budget overdraw. Ground chassis via M4 screw (≤0.1 Ω resistance). Use shielded Cat5e+/Cat6 cables for PoE runs. Separate fiber uplinks from high-voltage cables (>30 cm).

Maintenance recommendations: Monitor PoE utilization via SNMP. Update firmware using ExtremeXOS® TFTP tools. Clean fiber connectors annually. Replace internal cooling fans after 80,000 hours. Validate PTP synchronization during grid maintenance.