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Dualcomm

Dualcomm10/100/1000Base-T Gigabit Ethernet Network TAP [ETAP-2003]

Based on 117 reviews
Condition: New
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$229.95
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Availability: 15 left in stock
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Arrives Thursday, Nov 12
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At a glance

Condition
New
Model
ETAP-2003_SML
Dimensions
3.74"L x 2.83"W x 1.06"H
Weight
12 oz
Color
Green, Silver, Gold
Hardware Interface
Ethernet
Data Link Protocol
IEEE 802.3
Warranty
1 year manufacturer warranty
Works with
Any device that supports a 10/100/1000Base-T Ethernet link

Features 5

  • Network Tap for use with 10/100/1000Base-T Ethernet link
  • Reliable and high performance. Tested with maximum in-line cable length (200m) at full 1Gbps data throughput with no single packet loss
  • Capable of being powered from a computer's USB port with built-in inrush current limiting circuit to prevent the computer from possible damages or disturbances by instantaneous current surge
  • Compatible with Power-over-Ethernet (PoE)

Description

The Dualcomm ETAP-2003 is a compact, rugged, and highly reliable Network TAP designed for monitoring and capturing network traffic on 10/100/1000Base-T Ethernet links. Housed in a durable metal enclosure, it is the smallest Gigabit Ethernet Network TAPs available, making it ideal for both portable and permanent deployment. The ETAP-2003 can be powered directly from a computer's USB port and incorporates a built-in inrush current limiting circuit to protect the host computer from excessive startup current. This design minimizes the risk of USB port interruptions or hardware damage caused by sudden current surges. The device is fully compatible with Power over Ethernet (PoE), allowing PoE power to pass transparently between the two in-line network ports without interruption. This capability makes the ETAP-2003 particularly well suited for monitoring traffic on PoE-enabled devices such as IP cameras, wireless access points, VoIP phones, and IoT equipment. As a dependable network monitoring and troubleshooting tool, the ETAP-2003 has been rigorously tested with a total in-line cable length of up to 200 meters while sustaining full Gigabit Ethernet throughput without packet loss. This performance makes it an excellent solution for portable packet capture, network diagnostics, performance analysis, and security monitoring. To enhance network safety, the monitor port blocks ingress traffic by default, preventing monitoring devices from accidentally injecting packets back into the production network. For applications requiring bidirectional communication through the monitor port, the ETAP-2003R variant is available. The ETAP-2003R operates identically to the ETAP-2003 except that ingress traffic on the monitor port is not blocked. With its compact form factor, PoE compatibility, robust construction, and reliable performance, the ETAP-2003 is an ideal solution for network engineers, security professionals, and IT administrators who need a dependable tool for monitoring and troubleshooting Gigabit Ethernet networks.

Specs 16

Brand Dualcomm
Hardware Interface Ethernet
Color Green, Silver, Gold
Product Dimensions 3.74"L x 2.83"W x 1.06"H
Data Link Protocol IEEE 802.3
Data Transfer Rate 1 Gbps
Item Weight 12 ounces
Unit Count 1 Count

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Nov 12

Yes, absolutely! This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

nice idea handy product to keep in the bag
Model: ETAP-2003_SML
was used to carrying around old dumb switches to do packet captures and they usually die as they were old to begin with and the final straw was one dying in the middle of client down situation.....so in looking for another replacement stumbled across this unit had never heard of the vendor before but they had some big names on their site for what that's worth but getting back to the product in replacing an old hub I this rig can fulfill another roll as a replacement switch should a client lose one in addition to its primary roll and I thought the price was reasonable I do not use it constantly but when I have used it to do some traces it has worked as advertised ... show more
Reviewed in the United States on June 11, 2014 by M Thompson
A must for sniffing and carrying
Model: ETAP-2003_SML
As a security consultant, I was carrying an old metal 10/100 hub with its power supply, in order to easily tap a workstation or server without having access to a managed switch with mirror capabilities. I found this light switch (in its plastic version), powered by USB (it works on my laptop), with a TAP port (as I needed), Gigabit (at last), and the PoE support could be useful one day... Moreover, as I am in Monte-Carlo (Monaco, south-east of France), I received this item more quickly than announced :) ... show more
Reviewed in the United States on April 5, 2011 by merlinus98
Good for monitoring
Model: ETAP-2003_SML
This is great for using WireShark to monitor Ethernet traffic to a device. You can only monitor though, not inject data in the stream. Works great for my purposes.
Reviewed in the United States on February 1, 2026 by John Van Valkenburgh
This should be work related, right?
Model: ETAP-2003_SML
... I think the last time I was this excited about a network device I was 13 years old and my mom got me a 2400 baud modem for my birthday. The unit works exactly as described, it mirrors port 1 to port 5, leaving the remaining 3 ports as regular switched ethernet ports (though port 2 is also the PoE passthrough, which I haven't had the chance to test to that extent). It couldn't be more straight forward than it is. The USB power is fairly cool, I can imagine it being very practical when you're near a server rack trying to sort stuff out. Right now I'm actually using an iphone wall socket to power the unit since my router and switch is rather far away from my workstations. Works just fine. But I see a soldering iron in my future if/when that cable breaks (still beats scavenging ebay for a compatible power supply, waiting for it to be delivered, etc). The manual is...well...a single page that describes the device. There is no setup instructions or common scenarios, nothing. And that's ok, this isn't for the uninitiated anyway. If you can't figure out how to connect a switch tap you'll never get wireshark display filters to work for you anyway... 5 star for price, features, ease of use and I could ding them for the manual, but I won't. It's fine the way it is. ... show more
Reviewed in the United States on October 18, 2012 by N. Povoa
Works great with Wire Shark
Model: ETAP-2003_SML
Works great with Wire Shark sniffer software. Best price too.
Reviewed in the United States on September 26, 2025 by Richard C. Ortlip
Great Ethernet Tap
Model: ETAP-2003_SML
There are cheaper tools that can tap into Ethernet connections (see Throwing Star on Amazon for $15), but only this Dualcomm supports full gigabit connections. Amazing. Used this to diagnose "what's going on" with a router to satellite link (discovered VLANs where I had not expected them). Also, the manufacturer responds to questions about the product. ... show more
Reviewed in the United States on September 29, 2025 by Dick B.
Big help
Model: ETAP-2003_SML
This makes my job much easier but make sure you have the right one for the job. I wanted to be able to tap into a camera feed to view the picture and this model does not do that but Dualcomm does have one that will. When I couldn't get it to work I called Dualcomm and they where great to work with and made sure I got the one I needed. ... show more
Reviewed in the United States on July 2, 2021 by John II
Excellent product for a network intrusion detection system.
Model: ETAP-2003_SML
When I started doing my research for network taps I was surprised at the expense. It seemed that many products were over $500. What was I missing? It seemed like such a small thing to do, just like the old hubs. For my application, I needed a passive tap because it was going to be used to feed a network intrusion detection system (NIDS). Sure, I could have mirrored a port on my cisco switches, but I didn't want to lose any packets. The Dualcomm Gigabit Network TAP's price point made the purchase a no-brainer when comparing other products. When I received the product it was extremely simple to setup. No software configuration necessary. A simple passthrough from ports 1 to 2 with port mirroring on port 5. It doesn't get any easier than that. The system has been working great and has been successfully transmitting packets to my NIDS. I've already detected several worms on my internal workstations. It is hard to put a price on that. I recommend the product and don't have any complaints. ... show more
Reviewed in the United States on October 6, 2015 by AlohaKine
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