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 with Speed & Style

DUAL OS FLEXIBILITY - Switch between RouterOS and SwOS for either advanced routing or simplified switching—customize your network like a pro.
BLAZING 10 G SFP SPEEDS - Experience lightning-fast data transfer with four 10G SFP+ ports, perfect for future-proofing your network.
SILENT SLEEK COMPACT - Fanless metal chassis ensures whisper-quiet operation in a stylish, space-saving design that fits any modern workspace.
SEAMLESS PO E POWER DELIVERY - One Gigabit Ethernet port supports 802.3af/at PoE/PoE+ and 12-57V passive PoE, powering your devices effortlessly.
BEST IN CLASS PRICE PERFORMANCE - Get enterprise-grade features without the enterprise price tag—maximize ROI and stay ahead of the curve.

The MikroTik CRS305-1G-4S+in is a compact, fanless managed switch featuring one Gigabit Ethernet port with PoE support and four ultra-fast 10G SFP+ ports. Its dual-boot system allows users to toggle between RouterOS for advanced routing and SwOS for simplified switching, all housed in a sleek metal case designed for silent operation. Ideal for professionals seeking high performance and flexibility at a disruptive price point.

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Product dimensions	14.1L x 11.5W x 2.8H centimeters
Item weight	454 g
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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