Overview:
Mikrotik Routerboard's RB-CRS309S is a compact yet powerful networking switch. It features 8x SFP+ ports and 1x Gigabit Ethernet management port which also supports PoE input. The RB-CRS309S supports a dual-boot feature offering both RouterOS and SwitchOS boot options, an RS232 serial port and grounding terminal. The compact and sleek metallic enclosure also acts as a heatsink, making this device passively cooled so there is no fan noise and no dust accumulation inside.
Specifications:
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Specifications![]() | |
| Product Code | RB-CRS309S![]() |
| Architecture | ARM 32bit |
| CPU | 98DX8208 |
| CPU | core count 2 |
| CPU nominal frequency | 800 MHz |
| CPU temperature monitor | Yes |
| DC inputs | 1x DC jack, 1x PoE-In |
| DC jack input Voltage | 12-57 V |
| Ethernet Ports | 1x 10/100/1000 |
| License level | 5 |
| Max power consumption | 23 W |
| Max power consumption without attachments | 17 W |
| Operating System | RouterOS / SwitchOS |
| PoE in | 802.3af/at |
| PoE in input Voltage | 18-57 V |
| RAM | 512 MB |
| Serial port | RS232 |
| SFP+ ports | 8 |
| Storage size | 16 MB |
| Storage type | FLASH |
| Tested ambient temperature | -40°C to 70°C |
| Dimensions | 272 x 158 x 44 mm |
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