Can you run the ethernet port to another switch or is it strictly for management purposes?

can I use this as two 2.5gb aggregation for my nas and connect to my desktop with 5gb ethernet port?

Anyone try connecting a 10g RJ45 transceiver in one of these sfp ports? I'd love to convert 10g fiber to 10g copper ethernet.

I run this switch with three (3)10G RJ45 transceivers (10Gtek for Cisco SFP-10G-T-S Compatible 10GBase-T SFP+ 10 Gigabit RJ45 Copper Transceiver 30-Meter) and one (1) DAC cable (10Gtek 10G SFP+ DAC Cable - 10GBASE-CU Passive Direct Attach Copper Twinax SFP Cable for Cisco SFP-H10GB-CU3M, Ubiquiti, D-Link, Supermicro, Netgear, Mikrotik, ZTE Devices, 3m. Works like a champ.

Can i use regular cat7 rj45 cables in the sfp+ to achieve 10gbe speeds, or do i need to use a different cable?

When using RJ45 sfp+ modules, you do not need Cat7 (not technically a US standard anyway). Cat 6a must be able to carry 10mbit for at least 100M. Cat 6 has to be able to do at least 55M, longer than any most any home or small business run is going to be. Cat 5e, while not officially rated, will generally work fine for 10gbit over the length of runs used in homes.

Can I use this as 1 fiber uplink to data center then the other 3 fiber ports to different buildings and the copper to connect to another switch?

Yes. Just think of it as a switch. All 5 ports are on the same network. I have 2 installed essentially as you described.

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CRS305-1G-4S+in Network switch Managed Gigabit Ethernet (10/100/1000) Ethernet power (PoE) White

Product ID: 313962433

Details

Brand
Mikrotik
Colour
Silver
Compatible devices
Desktop
Included components
2 x Power
Number of ports
5

⚡4 x SFP+ 10Gbps ports

🔌1Gbit PoE+ Ethernet port

🛡️Dual OS: RouterOS & SwOS

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$U16737

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Description

🚀 Elevate your network game with speed, power, and style!

DUAL BOOT FLEXIBILITY - Switch effortlessly between RouterOS for advanced routing or SwOS for streamlined switch management—control your network your way.
POWERFUL PO E SUPPORT - Deliver up to 57V passive PoE and 802.3af/at standards to power your devices seamlessly with a single cable.
SILENT SLEEK COMPACT - Fanless metal design ensures whisper-quiet operation and a stylish footprint that fits perfectly in any modern workspace.
BLAZING 10 GBPS SFP PORTS - Experience ultra-fast data transfer with four high-speed SFP+ ports, perfect for future-proofing your network.
BEST IN CLASS PRICE PERFORMANCE - Get enterprise-grade features without the enterprise price tag—optimize your network budget while staying ahead.

The Mikrotik CRS305-1G-4S+in is a compact, fanless managed network switch featuring 4 ultra-fast 10Gbps SFP+ ports and a 1Gbit PoE+ Ethernet port. It supports dual operating systems—RouterOS for advanced routing and SwOS for simplified switch management—offering unmatched flexibility. Housed in a sleek metal case, it delivers powerful PoE capabilities (802.3af/at and 57V passive) and quiet operation, making it an ideal choice for professionals seeking high performance and reliability at a disruptive price point.

Specifications

ASIN	B07LFKGP1L
Best Sellers Rank	#42,713 in Computers ( See Top 100 in Computers ) #303 in Network Switches
Brand	Mikrotik
Built-In Media	2 x Power Outlets
Case Material Type	Metal
Color	Silver
Compatible Devices	Desktop
Customer Reviews	4.7 4.7 out of 5 stars (1,085)
Data Transfer Rate	1000 Megabits Per Second
Global Trade Identification Number	00680392660855, 05903148914527
Interface	SFP+, RJ45
Item Dimensions L x W x H	14.1L x 11.5W x 2.8H centimeters
Item Type Name	Network Switches
Item Weight	454 g
Manufacturer	Mikrotik
Mfr Part Number	CRS305-1G-4S+IN
Model Number	CRS305-1G-4S+IN
Number of Ports	5
Switch Type	Fixed, Managed, PoE
UPC	680392660855
Unit Count	1 Count
Upper Temperature Rating	40 Degrees Celsius
Voltage	57 Volts

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