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StarTech.com 10 ft Cross Wired DB9 to DB25 Serial Null Modem Cable - F/M - Null Modem Cable - DB-9 (F) to DB-25 (M) - 10 ft (SCNM925FM)

4.5 4.5 out of 5 stars 449 ratings
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$4.95 with 38 percent savings
List Price: $7.99
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1 Count (Pack of 1)
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Purchase options and add-ons

Brand STARTECH.COM
Connector Type Coaxial
Cable Type Serial
Compatible Devices Printer
Special Feature data transfer

About this item

  • SERIAL CABLE: The SCNM925FM 10ft Cross Wired Serial/Null Modem Cable features one DB9 female & one DB25 male connector, allowing you to connect a 9-pin serial device to a 25-pin serial port, or transfer files from PC-to-PC via a serial connection
  • QUALITY AND DURABILITY: Designed to provide a reliable, long-lasting connection; Made with molded connectors for strain relief and using high quality shielding to prevent EMI
  • SPECS: 10ft (3m) DB9 female to DB25 male cable | Pinout: Cross-wired/Null-modem | Jacket Material: PVC | Color: Gray
  • NOTE: This is a cross-wired/null modem cable. Please consult the manufacturer of your device to see if it requires a straight-through or null modem connection; This will not work for straight-through connections
› See more product details

4+ star item to consider

Amazon's Choice
4.7 out of 5 stars (517695)
$6.60

Frequently bought together

StarTech.com 10 ft Cross Wired DB9 to DB25 Serial Null Modem Cable - F/M - Null Modem Cable - DB-9 (F) to DB-25 (M) - 10 ft (
This item: StarTech.com 10 ft Cross Wired DB9 to DB25 Serial Null Modem Cable - F/M - Null Modem Cable - DB-9 (F) to DB-25 (M) - 10 ft (SCNM925FM)
$4.95
Get it as soon as Thursday, Jan 2
In Stock
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StarTech.com DB9 to DB25 Serial Cable Adapter - F/M - Serial adapter - DB-9 (F) to DB-25 (M) - AT925FM,Beige
$7.37
Get it as soon as Friday, Dec 27
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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
$11.99
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Customer reviews

4.5 out of 5 stars
449 global ratings

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Customers say

Customers find the electronic cable functional and well-built. They say it works well for their use cases and connects older equipment in chemistry labs. However, some customers have mixed opinions on the overall cable quality.

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FunctionalityBuild qualityCable quality
31 customers mention "Functionality"31 positive0 negative

Customers find the product functional and easy to use. It works well for connecting older equipment in a chemistry lab, HP 7574A plotters, and laptops. The quality seems good and the price is reasonable.

"...This worked perfectly and I highly recommend them" Read more

"Worked correctly" Read more

"...Ordfered nand it came quickly. Great product. Saved me a lot of headaches. worked perfectly. Thank you A+" Read more

"Works perfectly with my Amiga computer" Read more

16 customers mention "Build quality"16 positive0 negative

Customers appreciate the cable's build quality. They mention it has a sturdy construction and works flawlessly.

"This is a good cable - well built and comes in a old school grey color - perfect if you want to relive the computing of the 80s and 90s...." Read more

"Always great build quality and just what I needed for my TRS-80 Model 100" Read more

"...It did. It is well made. It should provide better ease of use than my rats nest cable...." Read more

"...Product build is what I expect and quality I need." Read more

9 customers mention "Cable quality"3 positive6 negative

Customers have different views on the cable quality. Some say it's good and works as a plotter cable. Others mention it's not a null modem or serial mapped cable, but a straight-through cable.

"...Where to begin...? First off, it has a cable - nothing today uses a "cable"..." Read more

"This is a good cable - well built and comes in a old school grey color - perfect if you want to relive the computing of the 80s and 90s...." Read more

"...It also is -not- a null modem cable. I've attached a table that shows the complete and utter nonsense pinout it has." Read more

"These are reverse wired, so if you are expecting a null modem cable do not order UNLESS you have a reason for different connections...." Read more

Works for my use-case
4 out of 5 stars
Works for my use-case
I do wish that before purchasing, I could have known the exact wiring. I saw a few others had the same need, so I tested the cable and thought I'd post my findings.DE-9 <-> DB-25---------------------(RxD) 2 <->2 (TxD)(TxD) 3 <-> 3 (RxD)(DTR) 4 <-> 6 (DSR)(G) 5 <-> 7 (G)(DSR) 6 <-> 20 (DTR)(RTS) 7 <-> 5 (CTS)(CTS) 8 <-> 4 (RTS)I hope this helps others.
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Top reviews from the United States

  • Robbyg
    5.0 out of 5 stars Worked with older Epson Receipt Printers
    Reviewed in the United States on September 3, 2024
    Size: 1 Count (Pack of 2)Verified Purchase
    Needed these for a Point of Sale system that uses older Serial receipt Printers.
    This worked perfectly and I highly recommend them
    Helpful
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  • Carrie
    5.0 out of 5 stars Works with HP 7574A plotter!
    Reviewed in the United States on November 29, 2019
    Size: 1 Count (Pack of 1)Verified Purchase
    This is a good cable - well built and comes in a old school grey color - perfect if you want to relive the computing of the 80s and 90s. More than the aesthetics, it is also good if you want to connect some equipment from that era.

    While StarTech does not provide a pinout, I can confirm that the cable works as a plotter cable (you can google plotter cable pinout to see how those are wired). Not sure about hardware handshaking as my HP 7574A plotter does not use it.
    One person found this helpful
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  • Cody
    5.0 out of 5 stars Works good
    Reviewed in the United States on August 4, 2024
    Size: 1 Count (Pack of 1)Verified Purchase
    Worked correctly
    Helpful
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  • MZ
    5.0 out of 5 stars For those odd cables
    Reviewed in the United States on September 14, 2023
    Size: 1 Count (Pack of 1)Verified Purchase
    Always great build quality and just what I needed for my TRS-80 Model 100
    2 people found this helpful
    Helpful
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  • Emmett
    5.0 out of 5 stars Great product. Saved me a lot of headaches. worked perfectly. Thank you A+
    Reviewed in the United States on February 20, 2024
    Size: 1 Count (Pack of 1)Verified Purchase
    I needed this cable urgently to work on an old but critical device. Was unable to locate at tech stores locally. Ordfered nand it came quickly. Great product. Saved me a lot of headaches. worked perfectly. Thank you A+
    Helpful
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  • Gadget-Guy
    4.0 out of 5 stars Something That Should No Longer Be Necessary
    Reviewed in the United States on April 25, 2022
    Size: 1 Count (Pack of 1)Verified Purchase
    This critter is a Blast from the Past.
    Where to begin...?
    First off, it has a cable - nothing today uses a "cable"
    Bluetooth, WiFi, Network connections, USB connections, near field connections, The Force.
    Ok, technically USB and Network connections have cables, too - but, you get the idea.
    Second, Nothing new has a 25 pin or 9 pin Cannon connector on it.

    So, obviously, we are talking seriously antiquated equipment here.
    Surprise - the equipment that I wanna talk to is 30 - 40 years old, phase 4 obsolete = the OEM won't admit that they built it.
    Yeah!! Our lab manager scored a piece of equipment on E-Bay, with (drum roll please) an RS232 communication port.
    Not just any RS232 port (like the dominant 9 pin port).
    He went the extra mile to find sumthun with a 25 pin RS232 port.
    Our USB to RS232 adapters are 9 pin...
    You can see where this is going.

    The RS232 communication protocol was the driving force for creating USB connections.
    RS232 does everything - whilst usually not working - at all.
    Between Baud Rates, Parity Bit, Stop Bit, hardware handshaking options, etc.. - oh, and, don't forget the null cable option, it was virtually impossible to figure out how to get two pieces of equipment to talk.

    Using other adapters and programmable jumpers on additional adapters, I managed to get a kluge cable to work.
    This particular product implied that it would do the same thing as my cobbled kluge.
    It did.
    It is well made.
    It should provide better ease of use than my rats nest cable.

    BTW - it is mentioned in the sellers information - I'll repeat it anyway.
    This is a Null RS232 cable.
    The Send Receive lines on the 9 pin and 25 pin connectors are rolled.
    One person found this helpful
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  • Tom Williams
    3.0 out of 5 stars Pins 3 and 2 (xmit and rcv) ARE NOT crossed over
    Reviewed in the United States on May 7, 2024
    Size: 1 Count (Pack of 1)Verified Purchase
    We were having problems with this cable and decided to ohm it out. For this cable, pin 3 of the DB25 went to pin 3 of the DB9 and pin 2 of the DB25 went to pin 2 of the DB9. So, they are not crossed over as stated in the very confusing description. I ordered a DB9 cross-over connector to fix this.
    One person found this helpful
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  • Scott Beckstead
    5.0 out of 5 stars Exceeds expectations
    Reviewed in the United States on February 8, 2024
    Size: 1 Count (Pack of 1)Verified Purchase
    Works perfectly with my Amiga computer
    2 people found this helpful
    Helpful
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Top reviews from other countries

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  • Philippe Gauthier Graveson
    5.0 out of 5 stars Good product!
    Reviewed in Canada on August 2, 2023
    Size: 1 Count (Pack of 1)Verified Purchase
    Good product!
    Report
  • Aki Mäntylä
    5.0 out of 5 stars Working null-modem for connecting computer to CNC
    Reviewed in Sweden on December 3, 2024
    Size: 1 Count (Pack of 1)Verified Purchase
    Most "null modem" cables do not work for connecting e.g. a computer to a CNC-machine.

    This one works great! Tested with a laptop using a USB to RS232 adapter connecting to a Takamaz X-10 CNC lathe. File transfers working as expected.
    Product as described. Long 3 meter cable is a plus in my book.
    Report
  • Tausif Khan
    5.0 out of 5 stars cable
    Reviewed in the United Arab Emirates on November 9, 2024
    Size: 1 Count (Pack of 1)Verified Purchase
    original product
    Report
  • Amazon Customer
    5.0 out of 5 stars excelente producto
    Reviewed in Mexico on April 8, 2019
    Size: 1 Count (Pack of 1)Verified Purchase
    Excelente producto, justo a tiempo y excelente calidad
    Report
  • Salva
    5.0 out of 5 stars Bueno y Barato
    Reviewed in Spain on September 25, 2020
    Size: 1 Count (Pack of 1)Verified Purchase
    Se ve de buena calidad a un buen precio. Cumple su función perfectamente.
    Report
 

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