MikroTik CRS112-8P-4S-IN – 8-Port Gigabit PoE Switch with 4 SFP for SMB Networks

MikroTik CRS112-8P-4S-IN is a managed PoE switch for small and medium offices, featuring 8 Gigabit Ethernet ports with power output and 4 SFP ports for fiber uplink, designed for infrastructures where centralized PoE delivery to wireless access points, IP cameras and VoIP phones is a core operational requirement. Commonly deployed as a PoE access switch in SMB networks, it supports both 802.3af/at auto-sensing PoE and Passive PoE across all 8 ports simultaneously.

All 8 Gigabit ports automatically detect the power requirement of connected devices and deliver the correct voltage, eliminating risk of equipment damage from incorrect power delivery. The included 28 V power supply covers standard deployment scenarios, while the secondary DC input for 48-57 V enables full 802.3af/at PoE for devices requiring higher voltage. Four SFP ports provide fiber uplink connectivity of up to 1 Gbps to the network core. Passive cooling ensures completely silent operation in office environments.

CRS112-8P-4S-IN runs RouterOS level 5, combining Layer 3 switch functionality with full routing capabilities. Each port can be independently assigned to switching or routing mode, providing network design flexibility without additional hardware. The switch supports management via Winbox, SSH and web interface with PCB temperature monitoring included for operational safety.

Recommended for small and medium offices centralizing PoE delivery for wireless access points and IP cameras, for networks requiring simultaneous compatibility with both Passive PoE and 802.3af/at devices, for installations where fiber uplink is mandatory, and for MikroTik-managed environments where a compact PoE switch with Layer 3 functionality covers both access-layer switching and basic routing needs.