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DTECH DB9 RS232 Serial Cable Null Modem Male to Female Cord Full Handshaking 7 Wire Crossover for Computer Switch Laptop Router Data Communication (15 Feet, Black)
DTECH

DTECH DB9 RS232 Serial Cable Null Modem Male to Female Cord Full Handshaking 7 Wire Crossover for Computer Switch Laptop Router Data Communication (15 Feet, Black)

Bottom line: The DTECH DB9 RS232 Serial Cable Null Modem Male to Female Cord Full ($13.98 on Amazon as of 2026-10-06): True 7-wire full-handshaking null modem: TX/RX, RTS/CTS, DTR/DSR all crossed; main trade-off: crossover only, so it cannot substitute for a straight-through serial extension.

$13.98

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ True 7-wire full-handshaking null modem: TX/RX, RTS/CTS, DTR/DSR all crossed
  • ✓ 15 ft reach lets a laptop sit away from rack or bench equipment
  • ✓ Aluminum foil shielding on the DE9 run guards against shop-floor noise
  • ✓ Thumbscrews on both DB9 ends keep the link from vibrating loose

Cons

  • ✗ Crossover only, so it cannot substitute for a straight-through serial extension
  • ✗ 30AWG conductors are thin if you need heavy pull-through or repeated flexing
  • ✗ Male-to-female pinout only, no male-male or female-female option listed
  • ✗ 15 ft is the single length shown, so short bench runs mean excess slack

Manufacturer description

Full Handshaking Signal RS232 Crosseover Cable (All Wire Connected)Note:1.It’s a 15 ft long RS232 serial crossover cable male to female port, DO NOT perform straight through function.2.It’s not a 15 pin VGA cable to connects computer to monitor, is only for RS 232 communication port to interface one system to anther system.3.Shielded with standard Foil-Al layer shielding as most cables do, it fits for most of jobs.Transfer data between two devices using a RS-232C serial communication protocolIf your equipment require full wire null modem cable (full handshaking signal), take this 15 foot 9…

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SpecPicks Verdict

SpecPicks scored DTECH DB9 RS232 Serial Cable Null Modem Male to Female Cord Full… using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. DTECH's cables & connectors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • 15ft serial null modem cable male to female extension cord (7 wire type and full handshaking) connects your computer to device with COM port RS-232 compatible interface
  • RS232 cable is wired as a 9 pin serial port Null-Modem cord that 2-3, 4-6, 7-8 line are cross linked (TX,RX,RTS, CTS, DTR,DSR wires are connected); standard shielded DE9 rs 232 cable extender with AL foil
  • DB9 null modem cable features DB9 connector on each end equipped with screws to ensure an easy and solid extension connection for stable serial cross data communication
  • The wires inside are of 30AWG gauge and easy to solder to, and they connect to the pins in the order of the standard wire color code (db9 male to female cable, not computer monitor DB15 VGA-cable)
  • 15 feet long null DB9 cable m/f for hooking up PC laptop to some old RS232C equipment like scanner, Modem, router, USB to serial adapter, printer, plotter, camera, barcode / embroidery machine, touchscreen, microcontroller, factory test equipment

Full Specifications

BrandDTECH
ColorFemale to Female
Gauge30
ModelDT-9007B-5M
Cable TypeSerial
Item ShapeRound
Model NameNull Serial Cable 15ft
Unit Count1 Count
Item Length15 feet
Part NumberDT-9007B-5M
ConnectivityUSB
CompatibilityPC, Switch
Connector TypeDB9
Number of Pins9
Connection TypeWired
Number of Items1
Special FeatureData Transfer, Low Voltage
Connector GenderMale-to-Female
Specification MetISO
Compatible DevicesGPS Navigation System, Laptop, Modem, Printer, Scanner

Ready to buy?

DTECH DB9 RS232 Serial Cable Null Modem Male to Female Cord Full Handshaking 7 Wire Crossover for Computer Switch Laptop Router Data Communication (15 Feet, Black) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $13.98

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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DTECH DB9 RS232 Serial Cable Null Modem Male to Female Cord Full Handshaking 7 Wire Crossover for Computer Switch Laptop Router Data Communication (15 Feet, Black)
$13.98
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