The CRS112-8P-4S-IN is a versatile PoE switch featuring eight gigabit RJ45 ports and multiple power output options, including auto-sensing 802.3af/at PoE/PoE+ and passive PoE. Four SFP ports provide fiber connectivity options for uplinks up to 1 Gbps. **Key Features:** - **8 Gigabit RJ45 Ports:** Support a variety of power output options for flexible connectivity. - **4 SFP Ports:** Offer fiber connectivity to handle high-speed uplinks. - **PoE Flexibility:** Automatic detection and support for powering 802.3af/at devices when using 48-57V DC input. - **Included Power Supply:** Comes with a 28V 3.4A power adapter. - **Additional DC Port:** Supports extra power supply inputs (48-57V), not included in the package. The CRS112-8P-4S-IN is designed to power 802.3af/at devices with an input range of 48-57V DC, automatically providing appropriate power. It offers a maximum output of 1A per port with 18-28V input, and 450mA with 48-57V. The total power limit is 2.8A at 24V and 1.4A at 48-57V, with PoE-Out distributed through pins B 4,5 (+) and 7,8 (-). **Technical Specifications:** - Power Output: Auto-sensing 802.3af/at PoE/PoE+ - Available Ports: 8x Gigabit RJ45, 4x SFP - Power Supply: 28V 3.4A included, supports additional input of 48-57V DC (not included) - PoE-Out: Distributed via pins B 4,5 (+) and 7,8 (-) - Maximum Current: 1A per port (18-28V input), 450mA per port (48-57V input) - Total Power Limit: 2.8A at 24V, 1.4A at 48-57V