Bought S3900 stackable switches before. Their dual power supply and LACP do us a great favor. Now we plan to buy more for stacking to connect the PCs and printers in our new office. The AM responds quickly, and asks about the numbers of our PCs and printers. The guy recommends the 48 port S3900-48T4S, coz it can meet our connecting need and can be stacked with our existing S3900-48T4S switch. Then, we discuss with the AM, and make a final draft for the whole connection. Finally, we get two S3900-48T4S and matched DAC cables for stacking. All the products work great and the support team is great to work with.

S3900-48T4S 48-Port 10/100/1000Base-T Gigabit Stackable Managed Switch with 10GB SFP+ Uplinks

Well what to say about this, well as you would know FS.COM is probably famous for their super cheap GBics and Fibre Optic Cables and the like, to be honest I was skeptical. I’ll elaborate on this more in a little while
I have been working in a High School for 20 years and we have always been a Hewlett Packard HP or CISCO school. When I first started in 1999 we had a bit 80 port switch and not knowing any better we stuck with this brand.
Being in a small school, we do not have the budgets of other big schools and so bang for our buck Value for Money is extremely important to us. Recently we were approved to upgrade our aging infrastructure and move to 10 gigabit networking. We had to of course get our 3 quotes so we approached our Hewlett Packard supplier and also just to see if we were in the mix the department of education’s CISCO supplier. We got two quotations back to do 7 switches and a fibre optic back bone one at about $35,000.00 AUD and another at about $37,000.00 AUD. When I spoke to our principal he almost fell off his chair and said that there would be no way we would be able to approve that amount of money you will have to stick with the networking gear you have and we will just have to put up with it.
We hit the Department of Education’s forums and I was pointed at FS.COM. We had a look at their gear and on paper it beat Hewlett Packard in speed, throughput and it was about 35 of the cost. We thought to ourselves this is too good to be true.
So we decided after a lot of talking with Ellen Wang and Gladys Yang who have been extremely helpful in this whole process and answered all of my questions as dumb as some of them may have been. That we would obtain a sample.
We were provided with S3900-48T4S 48-Port 10/100/1000Base-T Gigabit Stackable Managed Switch with 10GB SFP+ Uplinks and I tell you it is just a sensational little unit for what it is. We also purchased some 10 Gig Gbics and some direct attach cables and plugged them in.
We transferred over 300 Gigabytes in about 7 minutes and 30 seconds. These were very large Virtual Machines and we got according to Windows Explorer through a file transfer we were able to get anywhere between 380 MB per second to 430 MB per second steady.
We also transferred performed the same test with our newly acquired CISCO switch that was supplied by the department for our wireless controller.
We also transferred the same 300 Gigabytes in about 9 minutes. The main thing we noticed with this switch is that after a file transferred successfully the throughput dropped to 0 MB per second for a number of seconds. This switch was slightly faster however at about 420 MB per second up to about 470 MB per second but because it stopped after each file transfer it took longer to get back up to speed where as the S3900-48T4S 48-Port 10/100/1000Base-T Gigabit Stackable Managed Switch with 10GB SFP+ Uplinks was stable at its 380 MB per second – 430 MB per second and was able to get the job done easily.
We were able to do this test several times and it performed exactly the same over at least 3 repetitions of this test. When we logged the switch to watch its performance we did not see the processor go above 50 of its switching capability. The configuration is very simple to understand and everything is reachable a couple of clicks.
If there is something that you can’t understand then the Technical Support is also fantastic. We are planning to do the rest of our infrastructure upgrade with FS.COM because not only are we extremely happy and excited to be working with FS.COM.
The products they sell do what they say they will and meet our criteria and our cost envelope. We are very happy and would highly recommend FS.COM to anyone who is looking to really get great value for money, extremely friendly service and a product that can be depended on.

Package came a day earlier than expected with no signs of damage. 10GBASE-SR SFP+ 850nm 300m Transceiver worked well with the S3900-48T4S switch.

Got this switch after we ensured its compatibility with our Cisco DAC cables and 10G NIC card with FS guys. It worked without any issues.

I have two of these stacked in my server room. They can fully meet my needs of the customer LAN as an access layer switch. Working flawlessly with no issue. The web UI is pretty intuitive, while there's a cisco-like CLI available via telnet. You can choose the one you’re familiar with. I haven't had to mess with it since configuring it!

Fantastic switches with decent security features. Had replaced my old switches with these. VLAN setup is easy. Perfect for SMBs and remote offices with the quality and performance. I would definitely buy this unit again.

We work in IT and buy the switch to deal with 26 computers and two servers. We now use the switch to deliver 1Gb speed for our computers, and make 10Gb transmission between the servers.
It’s easy to configure. The web interface is nice and intuitive. We also have tried the CLI configuration. It’s similar to Cisco’s CLI. Our colleagues who are familiar with Cisco CLI prefer using it.
The switch could run nicely on much of the L2 features like LACP, VLAN, etc. And port mirroring enables us to monitor the traffic for security check. It also supports some L3 features like L3 unicast routing, but we haven’t tried that. We now use the compatible SFP/SFP+ modules and fiber cables recommended by FS technical team, and no packets drop.
We also want to give a star for the switch’s complete documentation. Files like test report, compatible modules datasheet, and configuration guide of DHCP, port mirroring, STP, etc are all provided. All in all, this switch is a good choice for small companies.

I found this S3900-48T4S could meet our network deployment need and consulted with the account manager about whether it could be installed on our 19'' cabinet. She recommended a cantilever fixed shelf to me in order to guarantee safety, which was considerate indeed. Along with the switch, there are also 1*console cable, 2*power cord, 1*grounding cable, 2*rack mount bracket, 6*screw, 4*rubber pad, plus one user manual in the package. Complete accessories!

Pretty good gigabit switch, both for its price and quality point. We have worked with them for nearly half a year but never had any issues. The after-sales service is good, my sales rep keeps a connection with me and asks about my experience.
Actually, I felt it inconvenient when configuring the switch for the first time, for we have been used to the configuration commands of Cisco. FS switch commands are like Cisco but there is something slightly different. I could not get used to this so fast. For example, I used to save config using the write command on Cisco but now copy config start config on it. Anyway, fortunately it works well.
What surprises me most is the user-friendly management, which other switches we used before lack. The config will not override the settings before but save a new file, so I can easily retrieve config in case there is something wrong.

Last month, I was trapped in figuring what switch to choose for my home network. The thing is that I have an empty 15U rack and I need to purchase a 10G switch to support three of my 10G devices and a Gigabit switch with at least 24 ports for other devices.
I was thinking of buying a 24-port or 48-port gigabit switch and a 10G switch. A friend reminded me that maybe a 24/48-port gigabit switch with 10G uplinks ports is the best choice for the sake of price. Then, I searched on the Internet and found two similar ones: Cisco WS-C2960L-48TQ-LL and FS S3900-48T4S. They have many similar features. I chose the latter mostly because of the BCM56150 chip and partially with its relatively favorable price. BTW, it works well. Hope it will be a reference for your purchase in some way.