The MikroTik CRS310-1G-5S-4S+IN is an ultra-compact indoor fiber switch engineered to deliver high-capacity optical aggregation for small-to-medium offices, server closets, and ISP customer branch locations. Designed as an affordable solution to overcome copper distance limitations (over 100 meters) without signal degradation or electromagnetic interference, it combines multiple 10G and 1G fiber ports inside a durable desktop chassis.
At its core, the device is powered by an ARM 32-bit Marvell 98DX226S switch chip operating at 800 MHz, paired with 256 MB RAM and 16 MB flash storage. It features 4x 10G SFP+ cages for rapid 10 Gbps backbone connectivity, 5x 1G SFP slots for gigabit fiber links, and 1x Gigabit Ethernet RJ45 port for local copper management or PoE power input.
The CRS310-1G-5S-4S+IN supports Dual Boot capability, giving network administrators the option to run lightweight SwitchOS for simplified Layer 2 switching or feature-rich RouterOS v7 Level 5 for hardware-offloaded Layer 3 routing, dynamic VLAN management, ACL filtering, and bandwidth control. Housed in a sturdy white metal enclosure with included rackmount ears, it can operate as a desktop unit or be integrated into standard 19-inch equipment racks.
Comprehensive Key Features
4x 10G SFP+ & 5x 1G SFP Fiber Cages: High-density optical port arrangement providing flexible combinations of 1 Gbps and 10 Gbps fiber links.
1x Gigabit Ethernet Port with PoE-In: Includes 1x 10/100/1000 RJ45 port accepting standard 802.3af/at or 18–57 V Passive PoE input for easy deployment.
Hardware-Offloaded Layer 3 Routing: Powered by Marvell switch architecture to handle VLAN filtering and Layer 3 routing offloading at wire speeds.
Dual Boot Operating System: Choose between SwOS for simplified L2 management or RouterOS v7 Level 5 for advanced L3 networking and firewall rules.
Flexible Desktop / 1U Rackmount Options: Compact metal chassis includes rackmount brackets for standard 19-inch rack installations.
Redundant Power Options: Supports powering via direct DC barrel jack (18–57 V DC) or PoE-in for uninterrupted power delivery options.
Extended Technical Specifications
1. Hardware & Physical Parameters
Model / SKU: CRS310-1G-5S-4S+IN
Dimensions: 0.200 m × 0.166 m × 0.045 m (200 × 166 × 45 mm)
Weight: 0.700 kg (700 g)
CPU: Marvell 98DX226S ARM 32-bit @ 800 MHz
RAM: 256 MB
Storage: 16 MB Flash
Enclosure Material: Durable White Desktop / Rackmount Metal Casing
Included Accessories: 24 V 1.2 A Power Adapter, Rackmount Ears (K-48 fastening set)
Status LEDs: Power, User LED, Port Link/Activity Indicators
2. Wireless, Networking & Performance Parameters
SFP+ Cages: 4× 10 Gbps SFP+ Ports
SFP Cages: 5× 1 Gbps SFP Ports
Ethernet Ports: 1× 10/100/1000 Mbps RJ45 Port (PoE-in)
Console Port: 1× RJ45 Serial Console Port
Operating System: Dual Boot (RouterOS v7 License Level 5 / SwOS)
Switching Capacity: 90 Gbps
3. Electrical & Environmental Parameters
Power Method: Direct DC Power Jack (18 – 57 V DC) or 802.3af/at PoE-in
Included Power Supply: 24 V DC / 1.2 A Power Adapter
Max Power Consumption: 20 W (8 W without attachments)
Cooling Type: Active Cooling (1 internal fan)
Operating Temperature: -40°C to 70°C (-40°F to 158°F)