Best Modem Cables of 2025

"After replacing my old cable, I noticed a huge improvement in my internet speed and reliability. My download speeds increased significantly, and my ping has dropped as well. I never expected such a difference from a simple cable!"

"I was having constant sync issues with my VDSL connection until I switched to this cable. Now, I hardly ever lose sync, and my upload speeds have nearly doubled. It’s made a noticeable difference in my gaming experience!"

"This cable replaced the cheap one ATT provided, and the difference was immediate. My download speed jumped from 37 Mbps to a full 43 Mbps. I used to doubt the importance of cable quality, but now I see the value in investing for better performance."

"I've been looking for a longer cable for my ATT VOIP router, and I finally found one that works perfectly. Great length at a great price. The quality is impressive, and it performs just as advertised without any service degradation. Highly recommend!"

"I had to replace a short cable for my DSL modem and chose this one for its quality. The connection is now more reliable, and my speeds are slightly higher than before. While it did cost a bit more, it was worth it for the performance."

"After relocating my computer, I was worried that a longer cable would affect my connection quality. But to my surprise, the connection seems stronger than it was with the shorter cable. The thickness is similar to an Ethernet cable, and overall I’m pleased with its high build quality."

"I bought this cable for programming a managed network switch. It arrived as described, and the shipping was fast. I would definitely recommend this cable for anyone needing a null modem cable."

"What I liked is that it worked perfectly. If you find yourself needing one of these cables, it might mean your situation isn't ideal. RS232 has become quite rare these days, and I needed this female-to-female RS232 null cable for an old oscilloscope. It was just what I was looking for, and it functions well despite some connector quirks."

"I'm totally happy with this cable; it works fine. The build quality seems good, and I have no complaints at all."

"I bought this cable because my DSL modem was in a hard-to-reach spot. My only regret is not ordering a longer one than 15 feet. It was just barely long enough, but I was pleasantly surprised to find that it actually improved my internet speed compared to the original 3-foot OEM cable. The connections felt much more solid too!"

"I was really pleased with how sturdy this cable is. After my router was struck by lightning, I upgraded my surge protector and replaced my old DSL cable with this one. So far, everything is working smoothly, and I would definitely recommend it!"

"After dealing with inconsistent internet speeds, I switched to this cable and noticed a significant difference. My previous flat uninsulated phone cable was causing interference, but since I replaced it, my internet has been steady. I'm very satisfied with this purchase!"

"I replaced a cable from 1986 and saw an improvement in speed—an extra 100 kb/s! The cable's stiffness and great shielding made installation a breeze. Plus, the see-through design is not only cool but also practical for inspections!"

"After moving my modem 50 feet, the original phone cord failed to maintain a stable connection. Switching to this cable resolved the issues entirely, and I now enjoy higher speeds than before. It's well-constructed and has excellent shielding!"

"Relocating my modem for better coverage was easy with this 50 ft. shielded cable. There's no interference, and it works perfectly. The price was unbeatable, especially compared to what my ISP offered!"

"I needed this cable urgently for an old but critical device. I couldn't find it in local tech stores, so I ordered it, and it arrived quickly. It's a great product that saved me a lot of headaches and worked perfectly. Thank you, A+!"

"This cable is a blast from the past! It's incredible to have a cable that connects to equipment from 30-40 years ago. My lab manager found a device with a 25-pin RS232 port. This product worked just like my makeshift cable, and it’s well made. It should be much easier to use than my previous setup!"

"This cable is of good quality at a reasonable price. It performs its function perfectly."

"This is definitely a cable that works. I discovered that it isn't suitable for powering devices through the serial connection, which was a surprise for me. However, it functions well for its intended use."

"I needed a null modem cable for a specific application, but I struggled to get it working. I ended up creating my own cable that worked perfectly. I'm unsure if this one is defective or simply not suited for my needs, as the RX and TX pins are swapped on each end, which I found odd."

"The price and quality are excellent. I received it overnight for an urgent situation, and it performed flawlessly. It's just a well-made cable!"

"I plugged this into my Lenovo Ideapad Flex 5 running Windows 11 and it automatically installed the necessary drivers. I've used it several times for troubleshooting ancient SUN servers and had no issues whatsoever. The 10' length is a bonus!"

"I needed a serial cable for some equipment installation and honestly expected a mediocre product, but I was pleasantly surprised. The quality is excellent—I've tried other 3-meter cables that had issues at lower speeds, but this one works flawlessly at 115200bps. Would I buy another? Definitely!"

"This well-made cable has performed perfectly while I was working with a very old computer and a PC emulating a terminal. It survived numerous connections and disconnections without any problems. I've used several StarTech products and have always been pleased with their design and quality."

"I’m connecting a Kenwood 890 transceiver with a 590s as a second receiver. Frequencies can be swapped easily with just a button press. The null modem cable works perfectly!"

"This null modem cable is great for my travels as a network engineer. Works exactly as expected, just remember to get a gender changer!"

"I tested the cable with an Ohm meter after troubleshooting. Disappointed to find PIN 2 not connected on one side. Not what I hoped for."

“I needed a connection cord for my adjustable bed that connects two moving pieces. The original broke during a move, and this replacement worked perfectly for a fraction of the price!”

“I purchased this cable to connect the two bases of my power motion bed frame. It worked exactly as I expected. I would definitely recommend it for anyone needing a similar 6-wire cable.”

“I was looking for a longer cable for my desktop practice amp and this one fit the bill perfectly. It’s the right length for my setup, and while I had to splice it a bit for more space, it’s a great product overall.”