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

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

Product ID: 102155884

Details

Brand
MikroTik
Color
white
Compatible Devices
Desktop
Included Components
2 DC jacks
Number of Ports
5

⚡4x 10G SFP+ ports

🔄Dual boot OS flexibility

🔇Fanless silent metal case

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Details

Brand
MikroTik
Color
white
Compatible Devices
Desktop

Description

🚀 Elevate your network game with silent speed and smart flexibility!

COMPACT YET MIGHTY - Small footprint with 512MB RAM and 800MHz CPU delivers powerful performance without bulk.
POWER REDUNDANCY READY - Dual DC jacks provide uninterrupted uptime with seamless power backup options.
TAILOR YOUR NETWORK OS - Switch effortlessly between RouterOS and SwOS for either advanced routing or streamlined switching.
BLAZING 10 G SFP SPEEDS - Experience ultra-fast data transfer with four 10 Gbit ports, perfect for high-demand professional setups.
WHISPER QUIET METAL DESIGN - Sleek, compact, and fanless metal chassis ensures silent operation in any workspace.

The MikroTik CRS305-1G-4S+in is a compact, fanless managed switch featuring four 10G SFP+ ports and a 1G Ethernet management port. Its dual DC power inputs ensure redundancy, while the dual boot system lets you choose between RouterOS for advanced Layer 3 routing or SwOS for simplified switching. Housed in a sleek metal case, it delivers powerful, quiet performance ideal for professional millennial managers seeking reliable, high-speed networking with flexible OS options.

Specifications

ASIN	B07LFKGP1L
Best Sellers Rank	#107 in Computer Networking Switches
Brand	MikroTik
Built-In Media	2 DC jacks
Case Material Type	Metal
Color	white
Compatible Devices	Desktop
Customer Reviews	4.7 out of 5 stars 1,122 Reviews
Data Transfer Rate	1000 Megabits Per Second
Global Trade Identification Number	00680392660855, 05903148914527
Included Components	2 DC jacks
Interface	SFP+, RJ45
Item Dimensions L x W x H	5.55"L x 4.53"W x 1.1"H
Item Type Name	Network Switches
Item Weight	16 ounces
Manufacturer	Mikrotik
Mfr Part Number	CRS305-1G-4S+IN
Model Number	CRS305-1G-4S+IN
Number of Ports	5
Product Dimensions	5.55"L x 4.53"W x 1.1"H
Switch Type	Flow Switch
UPC	680392660855
Voltage	57 Volts

Reviews

J**E

10.08.2024

A**R

27.07.2023

M**X

5.12.2019

X**R

1.04.2021

C**N

8.05.2024

O**7

2.05.2024

M**D

17.04.2021

A**T

23.03.2022

D**W

30.10.2023

M**S

25.10.2025

F**O

12.04.2021

C**.

21.11.2020

A**N

23.12.2025

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