The **EX77424-R2AWR** is a high-performance, industrial-grade managed PoE (Power over Ethernet) switch, typically manufactured by **EtherWAN**. It is designed for critical infrastructure, such as IP surveillance, traffic control, and factory automation. --- ## 1. Core Technical Specifications The electronics of this unit are optimized for high-speed data throughput and significant power delivery to connected devices. | Feature | Specification | | :--- | :--- | | **Total Ports** | 28 Ports | | **Copper Ports** | 24 × 10/100/1000BASE-T (RJ45) | | **Fiber Ports** | 4 × 100/1000BASE SFP (Dual Rate) | | **PoE Standards** | IEEE 802.3af/at (PoE+) | | **Switching Capacity** | 56 Gbps | | **Installation** | 1U Rackmount | --- ## 2. Electronic Component Breakdown ### A. Power Delivery System (PoE+) The "R2AWR" designation refers to specific power configurations. The electronic power stage is designed to handle: * **PoE Budget:** Up to 720W total (depending on power supply configuration). * **Per Port Output:** Up to 30W per port, suitable for PTZ cameras or wireless access points. * **Protection:** Integrated circuitry for over-current, over-voltage, and short-circuit protection. ### B. Networking Architecture The internal PCB (Printed Circuit Board) utilizes advanced Silicon for Layer 2 management: * **MAC Address Table:** Typically supports 8K entries, allowing for extensive device connectivity. * **Packet Buffer:** Large internal buffers to minimize packet loss during high-traffic bursts from high-resolution cameras. * **Jumbo Frames:** Supports up to 9K bytes for efficient data transfer. ### C. Environmental Hardening Unlike consumer-grade switches, the electronics in the EX77424-R2AWR are ruggedized: * **Operational Range:** Rated for -40°C to 75°C (-40°F to 167°F). * **Redundancy:** Dual power inputs for failover reliability. * **EMI/EMS:** High-level electromagnetic interference protection, crucial for placement near heavy machinery or electrical substations. --- ## 3. Management and Firmware Features The electronics are driven by a proprietary firmware that allows for: * **Redundancy Protocols:** Supports Alpha-Ring, Alpha-Chain, and STP/RSTP/MSTP for sub-15ms recovery. * **Security:** Port-based security, ACLs, and VLAN tagging (802.1Q). * **Remote Monitoring:** Full SNMP support (v1, v2c, v3) for network management systems. --- ## 4. Port Configuration Detail ```text [ 24 x RJ45 PoE+ ] + [ 4 x SFP Slots ] | | | +--> Uplink to Core Switch/Fiber Backbone +--> Connection to IP Cameras, VoIP, and Sensors ```