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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🚀 Power Your Network Like a Pro — Compact, Quiet, and Lightning Fast!

DUAL OS FLEXIBILITY - Switch between RouterOS for advanced Layer 3 routing or SwOS for streamlined switch management — total control in your hands.
BLAZING 10 G SFP SPEED - Four ultra-fast SFP+ ports deliver up to 10 Gbps per port for future-proof, high-bandwidth networking.
QUIET COMPACT METAL DESIGN - Sleek fanless metal chassis ensures whisper-quiet operation and fits perfectly in any modern workspace.
SEAMLESS PO E POWER DELIVERY - Supports 802.3af/at PoE/PoE+ and 12-57V passive PoE to power your devices effortlessly with a single cable.
BEST IN CLASS PRICE PERFORMANCE - Get enterprise-grade features without the enterprise price tag — maximize your network ROI today.

The MikroTik CRS305-1G-4S+in is a compact, fanless managed switch featuring 4 SFP+ ports supporting 10 Gbps speeds and 1 Gigabit RJ45 PoE port. It offers dual boot options between RouterOS and SwOS for versatile network management, housed in a sleek metal case designed for silent operation. Ideal for professionals seeking high-performance networking with flexible power-over-Ethernet capabilities at a disruptive price point.

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Product dimensions	14.1L x 11.5W x 2.8H centimeters
Item weight	1 Pounds
Voltage	57 Volts
Case material type	Metal
Interface type	SFP+, RJ45
Data transfer rate	1000 Megabits Per Second
Global Trade Identification Number	00680392660855, 05903148914527
Manufacturer	Mikrotik
UPC	680392660855
Item model number	CRS305-1G-4S+IN
Series	CRS305-1G-4S+IN
Color	white
Processor Count	1
Wireless Type	Radio Frequency
Number of Ethernet Ports	1
Wattage	10 watts
Are Batteries Included	No
Item Weight	454 g

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

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