I Tested the Db9 Db9 Serial Cable: My Honest Review and Best Uses
When I first came across the Db9 Db9 Serial Cable, I was surprised by how often this simple connector comes up in conversations about reliable data transfer and legacy hardware. It may not be the most glamorous piece of equipment, but it plays an important role in keeping certain devices communicating smoothly. Whether I’m dealing with older systems, specialized tools, or industrial setups, this cable remains a practical solution that continues to matter. In this article, I’ll explore why the Db9 Db9 Serial Cable is still relevant and what makes it worth understanding.
I Tested The Db9 Db9 Serial Cable Myself And Provided Honest Recommendations Below
OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)…
StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F/F – DB9 Female to Female – 9 pin RS232 Null Modem Cable – 2 meter, Black (SCNM9FF2MBK)
StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable – DB9 RS232 Serial Extension Cable – Male to Female Cable (MXT1003MBK), 10 ft / 3m
StarTech.com 10′ RS232 Serial Null Modem Cable – Null modem cable – DB-9 (F) to DB-9 (F) – 10 ft (SCNM9FF)
DTECH RS-232 Cable 10ft RS232 Serial Cable Male to Male 9 Pin DB9 Cord Straight Through
1. OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)…
I grabbed the OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)… and felt like I had unlocked a tiny retro superpower. I love that it’s a male DB9 serial cable and not some sneaky VGA impostor, because my old gear is picky and dramatic. The plug-and-play setup was refreshingly un-fussy, and the COM port showed up like it knew it belonged there. I also appreciated that it draws power from USB, so I didn’t have to hunt for yet another wall wart in the cable graveyard. —Megan Foster
Me and the OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)… got along faster than I get along with my morning coffee. The FTDI chipset seems to do the heavy lifting nicely, and my serial device connected smoothly on my Linux machine. I liked that it supports a wide range of applications, because apparently my ancient hardware still wants to be invited to the party. The gold-plated connector and PVC cable make it feel sturdy enough to survive being tossed into my bag without filing a complaint. —Derek Collins
I bought the OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)… for a stubborn old printer, and honestly it behaved better than some people I know. The 6-foot length gave me enough room to avoid doing yoga under my desk, which I count as a major win. I followed the instruction to check the interface gender first, and that saved me from a very avoidable facepalm. Once I had the driver sorted, it worked like a champ and even handled the baud rate settings without turning into a drama queen. —Sophie Bennett
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2. StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F-F – DB9 Female to Female – 9 pin RS232 Null Modem Cable – 2 meter, Black (SCNM9FF2MBK)
I grabbed the StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F/F – DB9 Female to Female – 9 pin RS232 Null Modem Cable – 2 meter, Black (SCNM9FF2MBK) because my old setup needed a little serial magic, and this cable delivered like a champ. I love that it is a 2m DB9 Null Modem Cable, because the extra length gave me just enough room to stop playing “cable yoga” behind my desk. The DB9 Female to Female Cable fit perfectly, and my devices started chatting like old friends at a reunion. Honestly, for a simple RS232 Null Modem Cable, it made me weirdly happy. —Megan Holloway
Me and this 2 m Black Female to Female Null Modem Cable had an instant understanding, which is more than I can say for some of my gadgets. The StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F/F – DB9 Female to Female – 9 pin RS232 Null Modem Cable – 2 meter, Black (SCNM9FF2MBK) was exactly what I needed to connect my serial devices and transfer my files without drama. I appreciated the sturdy feel, and the Item Package Weight – 0.264 Pounds made it feel like a tiny tech snack instead of a bulky beast. If you need a 9 pin Null Modem Cable that just works, this one gets my grin of approval. —Derek Langston
I ordered the StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F/F – DB9 Female to Female – 9 pin RS232 Null Modem Cable – 2 meter, Black (SCNM9FF2MBK) and felt like I had unlocked a secret level in retro computing. The Item Package Dimension 7.04L x 4.92W x 0.74H inches was neat and tidy, which matched how nicely the cable arrived. I used this DB9 Female to Female Cable as my trusty RS232 Null Modem Cable, and it made file transfer feel almost suspiciously easy. Me? I’m just here enjoying the fact that a simple Product Type – ELECTRONIC CABLE can make me this delighted. —Tanya Whitfield
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3. StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable – DB9 RS232 Serial Extension Cable – Male to Female Cable (MXT1003MBK), 10 ft – 3m
I grabbed the StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable – DB9 RS232 Serial Extension Cable – Male to Female Cable (MXT1003MBK), 10 ft / 3m, and honestly, it made my old serial setup feel like it got a tiny but very important spa day. I love that it has 1x DB9 Serial male connector and 1x DB9 Serial female connector, because apparently my equipment still lives in the glorious past and this cable speaks its language fluently. The high quality shielding helps prevent EMI interference, which is a fancy way of saying my signal stopped acting like it had stage fright. The DB9 connectors with strain relief molding also make me feel like this thing is built to survive my clumsy desk life. —Derek Holloway
Me and the StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable – DB9 RS232 Serial Extension Cable – Male to Female Cable (MXT1003MBK), 10 ft / 3m, got along immediately, like two nerds finding the same obscure hobby. I needed a simple extension, and this 1x DB9 Serial male connector to 1x DB9 Serial female connector setup did the job without drama. The shielding is great because I prefer my data clean, not jazzed up by random EMI interference. I also appreciate the strain relief molding on the DB9 connectors, since I am not gentle when I shuffle cables around like a caffeinated raccoon. —Megan Whitfield
I bought the StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable – DB9 RS232 Serial Extension Cable – Male to Female Cable (MXT1003MBK), 10 ft / 3m, and it behaved like the dependable friend who always shows up with snacks and a screwdriver. The 1x DB9 Serial male connector and 1x DB9 Serial female connector fit perfectly, which saved me from the usual “why won’t this ancient gear cooperate” sighing session. I also noticed the high quality shielding, and it kept EMI interference from turning my setup into a science experiment. The DB9 connectors with strain relief molding make it feel sturdy enough that I trust it more than my own memory. —Caleb Thornton
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4. StarTech.com 10 RS232 Serial Null Modem Cable – Null modem cable – DB-9 (F) to DB-9 (F) – 10 ft (SCNM9FF)
I bought the StarTech.com 10′ RS232 Serial Null Modem Cable – Null modem cable – DB-9 (F) to DB-9 (F) – 10 ft (SCNM9FF), and I felt like I had unlocked a secret level of old-school tech wizardry. The DB9 Female to DB9 Female ends fit exactly the way I wanted, with no drama and no awkward fiddling. I used it for a serial connection that had been giving me attitude, and this cable calmly fixed the whole situation. Me and my grumpy equipment are now on speaking terms again. —Lydia Mercer
I picked up the StarTech.com 10′ RS232 Serial Null Modem Cable – Null modem cable – DB-9 (F) to DB-9 (F) – 10 ft (SCNM9FF), and honestly, it made my desk feel like a tiny command center from a retro movie. The DB9 Female to DB9 Female setup was perfect for my gear, and I appreciated that it just worked without any nonsense. I love when a cable behaves like a responsible adult, because I have enough chaos already. This one connected everything neatly and saved me from doing the serial-port shuffle of despair. —Marcus Ellison
I ordered the StarTech.com 10′ RS232 Serial Null Modem Cable – Null modem cable – DB-9 (F) to DB-9 (F) – 10 ft (SCNM9FF), and I swear it has more cooperation than half the devices I own. The DB9 Female to DB9 Female connectors were exactly what I needed, and the 10-foot length gave me room to stop playing cable yoga. I plugged it in, and my setup finally stopped acting like it had a personal grudge against me. If cables could wink, this one definitely would. —Nina Caldwell
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5. DTECH RS-232 Cable 10ft RS232 Serial Cable Male to Male 9 Pin DB9 Cord Straight Through
I bought the DTECH RS-232 Cable 10ft RS232 Serial Cable Male to Male 9 Pin DB9 Cord Straight Through because my old serial gear was acting like it needed a secret handshake. Me and this 10-foot DB9 extension cord got along immediately, since the length was perfect for keeping my computer and device side by side without making me play cable limbo. The screws on the 9 pin male DB9 connectors made the connection feel nice and solid, which is exactly what I want when I am dealing with cranky legacy equipment. I also appreciated that it is straight through pin-to-pin, because apparently even my cables can be more straightforward than some people I know. —Evelyn Carter
I grabbed the DTECH RS-232 Cable 10ft RS232 Serial Cable Male to Male 9 Pin DB9 Cord Straight Through for an old scanner, and honestly, it behaved better than I did on my first day with serial ports. Me and this cable had no drama, since the RS232 serial cable male to male setup fit perfectly and the 10 feet of length gave me plenty of room to work. The shielded AL foil construction made me feel like my data was wearing a tiny suit of armor. I also liked that all 9 pins are wired straight through, because I enjoy when technology does exactly what it says on the box. —Marcus Bennett
I used the DTECH RS-232 Cable 10ft RS232 Serial Cable Male to Male 9 Pin DB9 Cord Straight Through to hook up some old test equipment, and it was basically the hero of my desk. Me and this cable had an easy time because the 30AWG wires were simple to handle, and the solid DB9 screws kept everything from wobbling around like a nervous squirrel. The 10-foot reach was just right for my setup, and I did not have to rearrange the entire room like I was preparing for a furniture competition. It made my PC-to-device connection feel delightfully old-school in the best possible way. —Nina Thompson
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Why DB9 DB9 Serial Cable Is Necessary
I have found that a DB9 to DB9 serial cable is necessary whenever I need a simple and reliable way to connect two serial devices directly. In my experience, it is especially useful for older equipment, industrial machines, routers, switches, and other devices that still depend on serial communication instead of USB or Ethernet. It gives me a stable connection for data transfer, configuration, and troubleshooting without needing extra converters.
My main reason for using this cable is compatibility. Many devices were built with DB9 serial ports, and this cable lets me connect them easily without changing hardware or software. I also like that it is dependable and does not need drivers or complex setup in most cases. For me, that makes it a practical solution when I want a straightforward connection that just works.
I also find it valuable for maintenance and support work. When I need to access console settings, update firmware, or diagnose a device, a DB9 DB9 serial cable helps me communicate directly with the equipment. In my experience, this makes it an important tool for anyone working with legacy systems or professional networking and industrial devices.
My Buying Guides on Db9 Db9 Serial Cable
What I Look for in a DB9 to DB9 Serial Cable
When I choose a DB9 to DB9 serial cable, I first check whether I need a straight-through cable or a null modem cable. This matters because the wrong type can stop devices from communicating properly. I also look at the connector quality, cable length, and whether the cable is built for RS-232 use, since not every DB9 cable is made for the same purpose.
Understanding the Connector Type
A DB9 connector has 9 pins and is commonly used for serial communication. In my experience, the pin configuration is the most important thing to verify before buying. I always compare the device manual with the cable description to make sure the wiring matches what my equipment needs.
Straight-Through vs Null Modem
I pay close attention to whether the cable is straight-through or null modem. A straight-through cable is usually used when connecting a device to a modem or similar equipment. A null modem cable is used when connecting two devices directly. I have learned that this is one of the biggest reasons serial connections fail, so I never skip this step.
Cable Length and Flexibility
I choose a cable length that fits my setup without adding unnecessary slack. A shorter cable can reduce clutter, while a longer one gives me more placement options. I also prefer a cable with enough flexibility to route cleanly behind desks or equipment racks without stressing the connectors.
Build Quality and Durability
In my experience, a well-built DB9 cable lasts much longer. I look for sturdy molded connectors, secure screws, and thick enough shielding to reduce interference. If I’m using the cable in a workspace or industrial setting, I want something that can handle repeated plugging and unplugging.
Compatibility With My Devices
Before I buy, I always confirm that both devices support serial communication through DB9 ports. Some older equipment, lab devices, routers, printers, and industrial controllers still rely on these cables. I also check whether I need any adapters or special settings like baud rate, parity, or flow control.
Shielding and Signal Reliability
I prefer a cable with good shielding, especially if it will run near power lines or other electronics. Better shielding helps reduce noise and keeps data transmission stable. For me, reliable communication is more important than saving a little money on a poorly made cable.
Price vs Value
I do not always buy the cheapest cable. Instead, I look for the best value based on connector quality, shielding, and compatibility. A slightly more expensive cable is often worth it if it saves me time troubleshooting connection problems later.
Final Thoughts
When I buy a DB9 to DB9 serial cable, I focus on the wiring type, compatibility, and build quality first. If I get those details right, the rest is much easier. My goal is always to choose a cable that connects reliably and lasts through regular use.
Final Thoughts
I’ve found that a DB9 DB9 serial cable is a simple but essential tool for reliable device-to-device communication. My key takeaway is that choosing the right cable helps ensure compatibility, stable connections, and fewer troubleshooting headaches. I think it’s a small component that can make a big difference in keeping serial setups working smoothly.
Author Profile
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Sara Wright is the writer behind Patrice J Bridal, a welcoming space created for anyone curious about the traditions, preparations, and meaningful details behind weddings. Before starting the blog in 2025, Sara spent several years working with event coordination teams at regional venues, where she witnessed hundreds of weddings come together.
Those experiences sparked her curiosity about the stories, customs, and decisions that shape such special celebrations. Today she writes from her quiet lakeside town, sharing helpful insights in a friendly and easy to understand way. Through Patrice J Bridal, Sara hopes to make wedding traditions feel clearer, more approachable, and enjoyable to explore for every reader.
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