DB9 Null Modem Adapter Male to Female Slimline Data Transfer Serial Port Adapter Gold Plated 2 Pack

Because serial is not exactly current technology it can be difficult to tell both what type of cable you need and what type of cable you are buying. Sellers don't know the difference and even if things are properly labeled the terminology and jargon might as well be hieroglyphics at this point. After purchasing the wrong ones, and buying the "right ones" but receiving completely different mislabeled cables, this item allowed me to get my DB9 - DB25 Epson Thermal Printers working. I still don't know exactly which cables I purchased or which I needed, but these fixed the issue regardless.

These adapters were solidly built and worked as advertised. Fast delivery and excellent packaging.

I purchased these for connecting legacy equipment that requires a null modem configuration, and they worked exactly as expected. The slimline form factor is helpful in tight setups where multiple DB9 connectors sit close together. Fit is solid once connected, and there’s no noticeable play in the connection. One detail I especially appreciate is the mechanical design of the screw posts. Each jack screw is essentially a double-sided threaded post — one end secures the adapter to the equipment’s serial port, and the other end has internal threading to accept the thumbscrews from the connected cable or another adapter. This allows the connection to be mechanically fastened on both sides, which adds stability and prevents accidental loosening in lab, rack, or field environments. Signal transfer has been stable with no communication issues during use. For serial troubleshooting or legacy device connections, they’ve been reliable.

Great product, but delivery was very unclear. I ended up walking all the way around the building to find it and did not. The package was placed in the mailbox for some reason and the only way I found it was that there was an obscure note about the driver dropped it in there instead of simply going in the front door and delivering it. Thats lazy work for sure.

Used this with a Ugreen USB to RS232 serial adapter because I needed a null modem crossover to make the computer interface to my laser engraver. Works great while not adding excess length and weight.

Worked great and was very inexpensive

Having been born in 94, I had never heard of null modem communication. Suddenly, the place I work for needs to start testing RF cables. They bought me an older piece of equipment that can be interfaced with via an "RS232" appearing port. Grabbed my trusty usb to serial cable. Couldn't get anything. Took a week of emails back a forth with the OEM to figure out I need a "null modem cable" to plug my cable into first. ANYWAYYY, this fixed everything after having to run software on a virtual box. I assume that means this works perfectly for whatever it is this adapter is for. 11/10 still have no idea what null modem communication is but I'm impressed.

These worked perfectly for my application. They arrived promptly, which is important now that we don't have a local store like Radio Shack to go to and get them.

As described.

Llegó en tiempo y forma

Amazon were the only market place to sell these null modem adapters at a great price. Quality item and an essential for older/retro computers and serial devices. Two of them are included in the package.

It works

I ended up buying these adapters to correct a driver problem on my laptop, it sounds strange but that's how it happened, I read in a forum that someone had the same problem as me, the PC did not recognize the RS232 cable and the solution was to buy this adapter just so corrected the problem.