20 Port Full Gigabit Unmanaged Industrial Switch, Rack Mount

4.5 out of 5 based on 2 reviews | Write a review

$924.00

Affordable 20-port Gigabit Ethernet switch, CSMA/CD protocol + 16 Gigabit RJ45 ports, unmanaged plug-and-play, support full/half duplex mode, wide range of DC 110-370V / AC 85-264V isolate power inputs, backplane bandwidth up to 40Gbps, ideal for applications that require high bandwidth and long distance communication.

SKU: ATO-ES-CIEN3020G

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Overview

Fanless IP40 rated 20 ports Layer 2 full Gigabit industrial switches, operating temperature range is -40 to 70° C to satisfy any special needs of industrial automation, outdoor applications, and harsh weather conditions.

Specification

Model	ATO-CIEN3020G-4GC-16GT
IEEE Standard	802.3, 802.3u, 802.3z, 802.3ab
Protocol	CSMA/CD
Processing Type	Store and Forward
Backplane Bandwidth	56 Gbps
Memory Buffer	4.1 Mbit
MAC Address Table	8K
Transfer Rate	14,880 pps (Ethernet Port)
	148,800 pps (Fast Ethernet Port)
Jumbo Frame	10,000 bytes
Gigabit Port	16 × 10/100/1000Base-T + 4 × 1000Base-LX ports
	20 × 10/100/1000Base-T
Copper Port Parameters	Physical Interface	RJ45 with shielding, IEEE 802.3 standard
	RJ45 Port	10/100/1000Base-T (Gigabit), supports auto-negotiation
	Transmission Distance	100 m (standard CAT5/CAT5e cable)
Fiber Port Parameters	Luminous Power	>12 dBm (single-mode), >17 dBm (multimode)
	Receiver Sensitivity	<−38 dBm (single-mode), <−35 dBm (multimode)
	Wavelength	1310 nm (single-mode), 1550 nm (single-mode)
		850 nm (multimode), 1310 nm (multimode)
	Transmission Distance	Multimode fiber 850 nm—2 km; 1310 nm—2/5 km
		Single-mode fiber 1310 nm—20/40/60 km; 1550 nm—20/40/60/80/120 km
	Connector Type	LC
	Transmission Rate	1.25 Gbps (Gigabit)
Power Parameters	Input Voltage	220 VAC/DC (85–264 VAC / 110–370 VDC), compliant with SELV requirements
	Input Power Consumption	24 W (maximum)
	Overcurrent Protection	Built-in
	Heat Dissipation Method	Aluminum alloy single-rib chassis surface heat dissipation
	Cable Exit Method	Front and rear cable exits
	Mounting Method	Standard 19" 1U rack-mount
	Enclosure Protection	IP40
	Dimensions	482.6 × 44 × 210 mm
Working Environment	Operating Temperature	−40 °C to +70 °C
	Storage Temperature	−40 °C to +85 °C
	Operating Humidity	5% to 95% RH (non-condensing)
EMI	FCC Part 15 Subpart B Class A; CE EN 55032 Class A; EN 61000-6-4 Class A
EMC Standards	CE EN 55024 Class A; EN 61000-6-2 Class A
	IEC 61000-4-2 (ESD), Level 4
	IEC 61000-4-5 (Surge), Level 4; Network ports support 6 kV surge protection
	IEC 61000-4-4 (EFT), Level 4
	IEC 61000-4-3 (RS), Level 4
	IEC 61000-4-6 (CS), Level 4
	EN 61000-4-8, Level 5

Dimensional Drawing (mm)

20 port Gigabit unmanaged industrial switch GE3020G dimension

Tips: Half-duplex and full-duplex
Half-duplex means that the sending and receiving of the same media is asynchronous. In contrast, full duplex has separate transmit and receive paths. Full-duplex links are the key to extending Fast Ethernet (100Mbps). A full-duplex link network segment cannot exceed two devices, and can be a network card or switch port.
10BASE-T and 10BASE-FL have separate transmit and receive paths, and full duplex can be performed depending on the complexity of the network card or switch port. If these interfaces are configured in half-duplex mode, the synchronous detection of receiving and transmitting will trigger the collision detection. The same interface is set to full duplex, and collision detection is disabled because full duplex does not follow the shared CSMA/CD rules.
As mentioned above, the network range at 100 Mbps has been reduced due to collisions. For twisted pair segments and switch ports, the longest distance of the segment is 100 meters (within the collision domain). The problem is that on fiber ports, for multimode fiber, the length of the network segment is 2 kilometers. For single-mode fiber, it is 15 kilometers. In the half-duplex mode, it is limited by the collision domain, and the network segment distance is 412 meters. Therefore, only in full-duplex mode (CSMA/CA is ignored), the extension of the fiber segment can reach its limit.

Existing reviews of 20 Port Full Gigabit Unmanaged Industrial Switch, Rack Mount

good industrial switch

We installed this 20 port full gigabit unmanaged industrial switch in our factory's control room six months ago. The 4 SFP ports work great for our fiber connections. The only minor issue is that the LED indicators are a bit too bright for our dimly lit control room. Overall it's good for our automation system.

From: Julia29 | Date: 30/10/2025

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Superior performance and convenience

This rack-mountable 20-port full Gigabit unmanaged industrial switch is outstanding. First of all, it is very powerful, stable and reliable without network delay or disconnection problems, ensuring the continuity of our industrial production. Its operation is simple and easy to understand, so even employees without professional network knowledge can use it easily. The compact design is perfect for rack mounting without taking up too much space, which improves the working efficiency of the production plant.

From: lily | Date: 17/09/2023

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