MikroTik CRS328-4C-20S-4S+RM 28-Port Gigabit PoE Rackmount Switch

The MikroTik CRS328-4C-20S-4S+RM is a 28-port Cloud Router Smart Switch engineered for high-density fiber aggregation environments. It delivers twenty SFP ports, four SFP+ ports supporting 10G modules, and four combo ports that can operate as either SFP or RJ45 Gigabit Ethernet connections—selectable in software, allowing scripted control over which physical interfaces are active even when all eight combo-port cables are connected simultaneously. Built on a 98DX3236 ARM 32-bit CPU running at 800 MHz with 512 MB of RAM, the switch ships with a dual-boot capability letting administrators choose between RouterOS and SwOS to match their operational workflow. The 1U rackmount chassis houses dual 100–240 V AC power supplies with failover functionality, ensuring continuous uptime in mission-critical rack deployments. A customizable mode button and RJ45 console port round out the management options, making this switch a practical, professional-grade choice for data centers, ISPs, and enterprise distribution layers that require high port density, fiber flexibility, and redundant power in a compact 1U footprint.

Key features & benefits

• 28 Independent Ports with Combo Flexibility — Twenty SFP ports, four SFP+ ports for 10G modules, and four combo ports that can be individually software-selected between SFP and RJ45 operation give network architects precise, script-driven control over physical connectivity.
• Dual Operating System Support — The dual-boot feature lets administrators run either RouterOS or SwOS, accommodating environments that need full routing capabilities or a streamlined switching-focused interface without hardware changes.
• Redundant Dual AC Power Supplies — Two integrated power supplies accept 100–240 V AC input and provide automatic failover, protecting against single-supply failures in uptime-sensitive deployments.
• ARM 32-bit Platform with Ample Memory — The 98DX3236 processor running at 800 MHz paired with 512 MB of RAM and 16 MB of FLASH storage provides the headroom needed to run complex routing tables, ACLs, and automation scripts.
• Built-in Hardware Monitoring — Onboard PCB temperature monitoring and a voltage monitor give operations teams real-time insight into thermal and electrical conditions, supporting proactive infrastructure management.
• RJ45 Console Port and Customizable Mode Button — Out-of-band management via the RJ45 serial console ensures access regardless of network state, while the programmable mode button can trigger any RouterOS command for fast, hands-on control.
• Validated Wide-Temperature Operation — Tested across -20 to +60 degrees C, the switch is suited for both climate-controlled data centers and less-controlled edge or industrial networking spaces.