MikroTik FiberBox Plus 1×GbE 4×SFP+ 10G IP66 Outdoor Switch
The MikroTik FiberBox Plus is a compact, ruggedised outdoor fibre switch designed for high-mast, pole, and tower deployments where reliable 10-Gigabit connectivity is needed in the field. Built around the Marvell 98DX226S switch chip with a 32-bit ARM CPU running at 800 MHz and 256 MB of RAM, it features one Gigabit Ethernet port and four 10G SFP+ ports, giving it a significant throughput advantage over its predecessor. It runs both RouterOS v7 and SwOS, offering flexibility between full-featured routing and streamlined switch management. Three power input options — 802.3af/at PoE-in, a DC jack, and a 2-pin terminal — make it easy to integrate into existing outdoor deployments. With an IP66 water-resistance rating providing protection against powerful water jets from any direction.
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The FiberBox Plus (CRS305-1G-4S+OUT) is a major upgrade over MikroTik's earlier FiberBox line and positions itself as an accessible outdoor alternative to the netFiber 9. The centrepiece of the upgrade is the Marvell 98DX226S switch chip — the same impressive chip found in higher-end MikroTik hardware — which enables four true 10-Gigabit SFP+ ports alongside a single Gigabit Ethernet port. The ARM 32-bit CPU runs at 800 MHz and is backed by 256 MB of RAM and 16 MB of FLASH storage, providing a solid platform for running RouterOS v7 or the simpler SwitchOS interface depending on the operator's preference.
The FiberBox Plus is an ideal aggregation point for mast-top devices such as wireless backhaul radios and sector antennas. It connects directly to whatever is mounted at height, eliminating the need to run individual cables down to a separate indoor switch and reducing both installation complexity and latency in the path. The unit's passive cooling design — with no moving parts — contributes to long-term reliability in unattended outdoor environments.
Power flexibility is a standout feature of this switch. It accepts 802.3af/at PoE-in on its Ethernet port (42–57 V), a standard DC jack (24–57 V), or a 2-pin terminal connector (24–57 V), so it can be powered via a PoE injector, a direct DC supply, or integrated into a panel or custom enclosure. Maximum power consumption is 17 W under load and just 7 W without attached devices. A Gigabit PoE injector is included in the box for convenient out-of-the-box deployment.
The enclosure carries an IP66 rating, meaning it is fully dust-tight and withstands powerful water jets from any direction — no additional weatherproofing box is needed. The unit ships with two fastening sets (K-41 and K-72) and two hose clamps to facilitate mounting on poles or masts of varying diameters, along with a 48 V power adapter and a Gigabit PoE injector.
Switching performance is non-blocking at Layer 2, with full line-rate throughput across all five ports. Certifications include CE, EAC, and RoHS compliance, and the device carries an IP66 environmental rating. Tested ambient operating temperature spans -40 °C to 70 °C, making it suitable for extreme cold and heat environments worldwide.
Key Specifications at a Glance
- Product Code: CRS305-1G-4S+OUT
- Architecture: ARM 32-bit
- CPU: Marvell 98DX226S @ 800 MHz
- Switch Chip: 98DX226S
- RAM: 256 MB
- Storage: 16 MB FLASH
- Operating System: RouterOS v7 / SwOS
- Ethernet Ports: 1× 10/100/1000 Mbps (RJ45, PoE-in)
- SFP+ Ports: 4× 10G SFP+
- Serial Console Port: RJ45
- Power Inputs: 3 (802.3af/at PoE-in 42–57 V, DC jack 24–57 V, 2-pin terminal 24–57 V)
- Max Power Consumption: 17 W (7 W without attachments)
- Cooling: Passive
- IP Rating: IP66
- Operating Temperature: -40 °C to 70 °C
- MTBF: ~200,000 hours at 25 °C
- Certifications: CE, EAC, RoHS
- Included: 48 V power adapter, Gigabit PoE injector, K-41 fastening set, K-72 fastening set, 2× hose clamps
- Product code
- CRS305-1G-4S+OUT
- Architecture
- ARM 32bit
- CPU core count
- ARM 32bit
- Switch chip model
- 98DX226S
- Operating System
- RouterOS v7, License level 5 / SwitchOS
- Size of RAM
- 256 MB
- Storage size
- 16 MB
- Storage type
- Flash
- Number of DC inputs
- 3 (PoE-in, DC jack, 2-pin terminal)
24-57 V - Max Power consumption
- 17 W
- Max power consumption without attachments
- 7 W
- PoE in input Voltage
- 42-57 V 802.3af/at
- Dimensions
- 330 x 200 x 70 mm
- 2-pin terminal input Voltage
- 24-57 V
- Operating Temperature
- -40°C to +70°C
- Number of 10G SFP+ ports
- 4
- Number of 1G Ethernet ports
- 1
General information
All students who attend the Training can receive a free L4 license from MikroTik. Training should be at least three days long.
Students are allowed to take the certification test ONLY upon the attendance of individual training course, in the class, under the supervision of a MikroTik Certified Training Partner.
Each certification test consists of a pre-defined % of random questions (multiple choice and true/false) from specific question categories. Items also have a difficulty parameter. MTCNA test is generated from more straightforward questions, Advanced tests – from more difficult questions.
Only one attempt is allowed. The test must be finished within one hour. The passing grade is set to 60%. There are 25 questions in the exam.
Certificate numbers and RouterOS L4 licenses are assigned automatically by MikroTik. Students can see their certificates and generate license keys once logged into the account server. Printed documents from MikroTik cost USD 30 per piece. Shipping is not included.
Remote training sessions and certification exams are not allowed.
MikroTik Certification Test without prior attendance of particular MikroTik Training Session is not allowed.
Wireless Netware offers every participant a free RouterBOARD hAP-ac-lite.
The price includes class attendance, course materials, coffee breaks and lunch, "Only for local Training." The amount does not cover travel and accommodation expenses.
Please bring (very important): Laptop, power extension strip (10ft./3m) with five sockets, one long Ethernet cable (16ft./5m+) and several short Ethernet cables.
Cost: Early bird price for the course is $850. It is valid 15 days before the scheduled session, referring to the MikroTik Training website. The price will be $1050 after the early bird date. The price includes class attendance, course materials, coffee breaks and lunch," Only for local Training." The amount does not cover travel and accommodation expenses. Seating is limited to only four students. The seat is reserved and guaranteed just after the payment is received in full amount.
Certificates will only be valid for three years.
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