MikroTik CRS305-1G-4S+OUT 10-Gigabit SFP+ Transceiver 4-Port

The MikroTik FiberBox Plus (CRS305-1G-4S+OUT) is a rugged, outdoor-rated managed fiber switch built around the Marvell 98DX226S switch chip and a dual-core ARM 32-bit CPU running at 800 MHz. It delivers four 10-Gigabit SFP+ ports alongside a single 10/100/1000 Ethernet port, giving network engineers a compact, high-throughput aggregation point for mast-mounted equipment, campus backhaul, and outdoor infrastructure deployments where pulling Ethernet over long distances is impractical. The enclosure carries an IP66 rating, making it suitable for direct outdoor installation without an additional junction box. Three independent power input options—a DC jack, a 2-pin terminal block, and 802.3af/at PoE-in—provide genuine installation flexibility across pole mounts, cabinet panels, and PoE-injector-fed runs. Running MikroTik RouterOS v7 or SwOS under a RouterOS License Level 5, the unit offers both deep routing capability and a simplified switch-management interface depending on operator preference. Maximum power consumption without attached SFP modules is only 7 W, rising to 17 W under full load, and passive cooling keeps the design silent and maintenance-free across a tested ambient range of -40 °C to 70 °C.

Key features & benefits

• Four 10-Gigabit SFP+ Ports — Four SFP+ slots provide 10 Gbps per port for fiber uplinks and device connections, eliminating the distance constraints inherent to copper Ethernet runs and enabling high-capacity links across buildings, masts, or campus segments.
• Marvell 98DX226S Switch Chip — The same switch silicon used in MikroTik's netFiber 9 platform delivers wire-rate Layer 2 switching performance, ensuring the hardware backbone matches the bandwidth headroom provided by the SFP+ ports.
• Triple Power Input Options — A standard DC jack (24–57 V), a 2-pin terminal block (24–57 V), and an 802.3af/at PoE-in port (42–57 V) give installers three independent paths to power the unit, simplifying integration into existing infrastructure without additional adapters.
• IP66 Outdoor Enclosure — The IP66 rating certifies protection against powerful water jets from any direction, allowing direct outdoor mounting on masts, walls, or poles without a secondary weatherproof enclosure.
• Dual Operating System Support — Ships with RouterOS v7 (License Level 5) and SwOS, enabling operators to choose between full-featured routing and firewall capabilities or a streamlined switch-only management interface depending on deployment requirements.
• Dual-Core ARM CPU with 256 MB RAM — A 2-core ARM 32-bit processor running at 800 MHz paired with 256 MB of RAM provides the processing headroom needed for routing, ACLs, and management tasks without becoming a bottleneck in the data path.
• Passive Cooling and Low Power Draw — Fanless passive cooling eliminates moving parts and noise while keeping maximum power consumption at 7 W without attachments and 17 W at full load, reducing operating costs and improving long-term reliability in sealed outdoor enclosures.
• Extended Temperature Range — Tested operation from -40 °C to 70 °C covers extreme cold-weather tower installations and hot rooftop or industrial environments without requiring active thermal management.