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Brand: MikroTik
MikroTik CRS310-1G-5S-4S+IN 10G SFP+ Switch
Description
An indoor fibre switch with five SFP and four SFP+ ports
The CRS310-1G-5S-4S+IN is a fibre switch with five 1G SFP ports, four 10G SFP+ ports and one gigabit Ethernet port. MikroTik calls it an indoor variation of its netFiber 9 switch, suited to small offices and small or medium ISPs, and a direct upgrade path for existing CRS212 setups.
It uses an ARM 32-bit CPU at 800 MHz with 2 cores, 256 MB RAM and 16 MB flash, plus a Marvell 98DX226S switch chip. The Ethernet port connects directly to the switch chip at full gigabit speed and accepts PoE-in, giving a second power option when the DC jack is not reachable.
Technical specifications
Published data for CRS310-1G-5S-4S+IN: datasheet values take priority over the web page throughout the table.
| Parameter | Specification |
|---|---|
| Product code | CRS310-1G-5S-4S+IN |
| Architecture | ARM 32bit |
| CPU | 98DX226S |
| CPU core count | 2 |
| CPU nominal frequency | 800 MHz |
| Switch chip model | 98DX226S |
| Operating System | RouterOS v7 / SwitchOS |
| Size of RAM | 256 MB |
| Storage size | 16 MB |
| Storage type | FLASH |
| Tested ambient temperature | -40°C to 70°C |
| Powering | |
| Number of DC inputs | 2 (DC jack, PoE-IN) |
| DC jack input Voltage | 18-57 V |
| Max power consumption | 20 W |
| Max power consumption without attachments | 8 W |
| Cooling type | 1 fan |
| PoE in input Voltage | 18-57 V |
| Ethernet | |
| 10/100/1000 Ethernet ports | 1 |
| Fiber | |
| SFP ports | 5 |
| SFP+ ports | 4 |
| Peripherals | |
| Serial console port | RJ45 |
| Other | |
| CPU temperature monitor | Yes |
| PCB temperature monitor | Yes |
| Voltage Monitor | Yes |
| Certification & Approvals | |
| Certification | CE, EAC, ROHS |
| IP | 20 |
Manufacturer test figures (98DX226 all port test), made to RFC2544 with Xena tooling:
| Test | Rules | Mbps at 1518 B | Mbps at 512 B | Mbps at 64 B |
|---|---|---|---|---|
| Bridging | none (fast path) | 1264.2 | 487.8 | 72.2 |
| Routing | none (fast path) | 1264.2 | 531.3 | 73.5 |
| Routing | 25 ip filter rules | 535.6 | 186.8 | 24.8 |
Reading the numbers: the nine fibre ports add up to 45 Gbps (derived: 5 x 1G plus 4 x 10G), plus the gigabit copper port. Hardware-offloaded VLAN filtering keeps this traffic out of the CPU. The table shows what the CPU itself can route: 1264.2 Mbps in the fast path at 1518 bytes, 535.6 Mbps with 25 IP filter rules, and 24.8 Mbps at 64 bytes with those rules. Use the switch as a Layer 2 aggregation device and let a router handle heavy Layer 3 work. Idle consumption is 8 W and the maximum is 20 W, so a single PoE-in feed or the adapter is enough.
Switch chip, ports and power
- 5 x SFP, 4 x SFP+ and 1 x 10/100/1000 Ethernet port; RJ45 serial console.
- Hardware-offloaded VLAN filtering and some hardware-offloaded Layer 3 routing.
- RouterOS v7 or SwOS; datasheet states 100-120 percent faster than the CRS212.
- Two DC inputs: DC jack and PoE-in, 18-57 V; 8 W idle and 20 W maximum.
- Tested ambient range -40 to 70 degrees C on the page; one fan; fits standard 1U rack with the supplied rack ears.
Order code and rack notes
The code CRS310-1G-5S-4S+IN reads: 1G = one gigabit copper port, 5S = five SFP, 4S+ = four SFP+, IN = indoor. The package includes a 24 V 1.2 A power adapter, a fastening set and rack ears. The datasheet lists the case as 200 x 166 x 45 mm. SFP and SFP+ modules are separate; select single-mode or multi-mode optics by link distance.
Installation and powering
Mount with the ears in a rack or on a shelf, then power it from the adapter or from a PoE source in the 18-57 V range. For configuration, MikroTik uses the same procedure as its other switches: a browser or WinBox at 192.168.88.1, user admin, no default password. MikroTik points out that fibre is a useful alternative to copper where electromagnetic interference, tampering or eavesdropping are concerns.
Fibre links in small offices and ISP sites
The switch suits building-to-building fibre aggregation, ISP access nodes, and campus uplinks over distances beyond 100 m of copper. Its ratings are for indoor use; in a hot equipment cabinet confirm the internal temperature against the 70 degrees C tested limit, which is a derived guideline rather than a continuous rating.
Information to send with an RFQ for the MikroTik CRS310-1G-5S-4S+IN 10G SFP+ Switch
Switch selection depends on how many devices connect, how they are powered and how the switch links back to the core. For the MikroTik CRS310-1G-5S-4S+IN 10G SFP+ Switch, list the number of copper and fibre ports you need, the PoE devices it will feed (cameras, access points, phones) and their individual power class, so the total PoE budget can be checked against the switch’s limit.
- Uplink speed and media: 1G, 2.5G or 10G, copper or SFP/SFP+, and the optic modules required.
- Management needs: VLANs, link aggregation, IGMP snooping, or central management from a controller.
- Rack space, airflow direction and power redundancy in the cabinet.
- Ambient temperature in the room or field cabinet, which matters in GCC summers.
A simple port map of the site is enough for the configuration to be checked before the order is confirmed.
Related items and documents
Look at the CRS354-48P-4S+2Q+RM for PoE and the CCR2004-1G-12S+2XS for routing. See the industrial communications category.
See the attached PDF for the manufacturer data. Seven Star LLC prepares quotations for CRS310-1G-5S-4S+IN on request.
Frequently asked questions
What ports does the CRS310-1G-5S-4S+IN have?
Five 1G SFP ports, four 10G SFP+ ports and one 10/100/1000 Ethernet port with PoE-in.
Is it for indoor or outdoor use?
It is the indoor (IN) variation of the netFiber 9 switch, intended for indoor installation.
What power inputs are available?
A DC jack and PoE-in on the Ethernet port, both 18-57 V; a 24 V 1.2 A adapter is supplied.
Does it offload VLAN filtering?
Yes, MikroTik lists hardware-offloaded VLAN filtering and some hardware Layer 3 routing.
Which operating systems are supported?
RouterOS v7 or SwOS.
Datasheets & Documents
- Datasheet MikroTik CRS310-1G-5S-4S+IN datasheet (PDF) Download
Reviews (0)
About brand
MikroTik is a Latvian maker of networking hardware and software, founded on 14 March 1996 in Riga by John Tully and Arnis Riekstiņš to develop routers and wireless ISP systems. In 1997 it created the RouterOS operating system for standard PC hardware, and in 2002 it began making its own hardware under the RouterBOARD brand. MikroTik is still privately owned by its two founders.
Seven Star LLC is an independent supplier in Muscat. We list MikroTik devices, each with the manufacturer datasheet, for ISPs, IT contractors and site networks in Oman and the GCC.
MikroTik company profile
| Founded | 14 March 1996, Riga, Latvia |
|---|---|
| Founders | John Tully (CEO) and Arnis Riekstiņš (CTO) |
| Headquarters | Riga, Latvia |
| Software | RouterOS, since 1997 |
| Product families | hEX and RB5009 routers, RB4011 rack-mount routers, CCR cloud core routers, CRS cloud router switches with PoE, wireless access points and outdoor links, RouterOS licences |
Milestones
- 1996: MikroTik is founded in Riga.
- 1997: RouterOS is created.
- 2002: The RouterBOARD hardware brand is born.
MikroTik product series
Routers include the CCR2004-1G-12S+2XS with 25G SFP28 ports, the RB5009UG+S+IN quad-core router with 10G, the rack-mount RB4011iGS+RM and the compact hEX RB750Gr3. Switches include the CRS354-48P-4S+2Q+RM 48-port and CRS328-24P-4S+RM 24-port PoE switches and the CRS310-1G-5S-4S+IN fibre switch.
Wireless products include the SXTsq 5 ac outdoor 5 GHz client and link device, the LtAP LTE6 kit weatherproof 4G router and the cAP ax dual-band Wi-Fi 6 ceiling access point.
Where MikroTik equipment is used
Branch and site-office routing, ISP and campus fibre aggregation, PoE switching for cameras and access points, point-to-point wireless links between buildings, and cellular backup at remote sites.
MikroTik products we list
Ordering MikroTik devices: what we need
Send the exact order code, the quantity, the power source (AC, DC or PoE) and, for wireless and LTE models, the country of use so the regional variant and bands can be confirmed.
Facts checked against MikroTik's own about page (mikrotik.com), October 2026.
Browse MikroTik products by category: Industrial Communications.
Related products
Frequently Asked Questions
What ports does the CRS310-1G-5S-4S+IN have?
Five 1G SFP ports, four 10G SFP+ ports and one 10/100/1000 Ethernet port with PoE-in.
Is it for indoor or outdoor use?
It is the indoor (IN) variation of the netFiber 9 switch, intended for indoor installation.
What power inputs are available?
A DC jack and PoE-in on the Ethernet port, both 18-57 V; a 24 V 1.2 A adapter is supplied.
Does it offload VLAN filtering?
Yes, MikroTik lists hardware-offloaded VLAN filtering and some hardware Layer 3 routing.
Which operating systems are supported?
RouterOS v7 or SwOS.
Reviews
There are no reviews yet.