The MikroTik CRS112-8P-4S-IN is a highly versatile 12-port PoE switch engineered for small to medium enterprise networks requiring both power-over-Ethernet deployment and fiber optic backhaul connectivity. Featuring eight 10/100/1000 Mbps RJ45 ports alongside four 1.25G SFP cages, the device provides flexible network expansion options in a low-profile desktop or rackmount form factor.
The switch stands out for its dual power input architecture and dynamic PoE-out support. Equipped with automatic device detection, it can deliver passive 24V PoE or 802.3af/at PoE/PoE+ directly over its eight Ethernet ports. Housed in a durable metallic chassis with passive cooling, the CRS112-8P-4S-IN delivers silent operation under full load while leveraging the comprehensive feature set of RouterOS (Level 5 license).
Comprehensive Key Features
8x Gigabit PoE Ports: 8 Gigabit Ethernet RJ45 ports capable of delivering auto-sensing 802.3af/at PoE/PoE+ and Passive PoE to power IP cameras, access points, and VoIP phones.
4x SFP Optical Uplinks: 4 dedicated 1.25G SFP cages providing high-bandwidth fiber connectivity over extended distances.
Dual Power Input Architecture: Features two independent DC input jacks supporting 18–28 V and 48–57 V power supplies for flexible PoE output scenarios.
Fanless & Silent Operation: Heavy-duty metal housing acts as a heat sink to ensure completely fanless, noise-free, and dust-free operation.
Non-Blocking Layer 2/3 Switching: 24 Gbps switching capacity and 12 Gbps non-blocking throughput for uncompromised network line-rate performance.
Enterprise RouterOS L5 Integration: Pre-installed with RouterOS Level 5 license, supporting VLAN tagging, IGMP snooping, port isolation, link aggregation, and custom routing policies.
Extended Technical Specifications
1. Hardware & Physical Parameters
Model / SKU: CRS112-8P-4S-IN
Dimensions: 0.200 m × 0.142 m × 0.044 m (200 × 142 × 44 mm)
Weight: 1.700 kg (Chassis + standard accessories)
CPU: QCA8511 Single-Core @ 400 MHz
RAM: 128 MB
Storage: 16 MB Flash
Enclosure Material: Desktop / Rackmount Metal Casing
Status LEDs: Power, User LED, Ethernet Link/Activity, PoE Out Status (Low/High Voltage)
2. Wireless, Networking & Performance Parameters
Ethernet Ports: 8× 10/100/1000 Mbps RJ45 Ports with PoE-out
SFP Cages: 4× 1.25 Gbps SFP Slots
Switching Capacity: 24 Gbps
Non-Blocking Throughput: 12 Gbps
Forwarding Rate: 17.8 Mpps
Operating System: MikroTik RouterOS (License Level 5)
3. Electrical & Environmental Parameters
Power Method: Dual DC Power Jacks (Jack 1: 18 – 28V DC; Jack 2: 48 – 57V DC)
Included Power Supply: 28V DC / 3.4A Power Adapter
PoE Out Capabilities: Auto-sensing 802.3af/at (requires 48-57V PSU) and Passive PoE (Mode B 4,5+ / 7,8-)
Max PoE Output Current: 1A per port (18–28V, max 2.8A total) / 450mA per port (48–57V, max 1.4A total)
Max Power Consumption: 160 W (with connected PoE devices), 10 W (without attachments)
Cooling Type: Passive / Fanless
Operating Temperature: -20°C to 60°C (-4°F to 140°F)