The managed Layer 2 MikroTik CRS504-4XQ-IN switch connects devices through four 100 Gigabit QSFP28 ports and has a separate Ethernet port for management. Each QSFP28 port uses four 25 Gigabit lanes and, with a suitable breakout cable, can connect 25 Gigabit devices. It also supports combinations of 100, 40, 25, 10 and 1 Gigabit connections.

The switch runs preinstalled RouterOS and can be mounted in a rack or on a wall. It is powered via AC, a DC jack, a two-pin terminal or PoE-in, and has an RJ45 serial console port.

• Type: Managed Layer 2 switch
• QSFP28 ports: 4 × 100 Gigabit
• Lanes per QSFP28 port: 4 × 25 Gigabit
• Management port: 1 × 10/100 Ethernet
• Mounting: Rack or wall
• Operating system: RouterOS, preinstalled
• RouterOS license: Level 5
• Architecture: MIPSBE
• Processor: QCA9531, 1 core at 650 MHz
• RAM: 64 MB
• Storage: 16 MB FLASH
• AC inputs: 2
• DC inputs: 3 (DC jack, PoE-in, two-pin terminal)
• DC input voltage: 36–57 V at the DC jack and two-pin terminal
• PoE-in: 802.3 bt, 43–57 V
• Power supply frequency: 47–63 Hz
• Maximum power consumption: 41 W, or 25 W with no accessories connected
• Serial console: RJ45
• Monitoring: CPU and board temperature, and voltage
• Ambient temperature: Tested from -40 °C to 70 °C
• Certifications: CE, EAC, ROHS
• Protection rating: IP20
• Package contents: K10 screw set, 2 IEC cables and rack-mounting hardware