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DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45-2pcs
XMSJSIY

DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45-2pcs

Bottom line: The XMSJSIY DB9 RS232 to RJ45 Extender: Runs RS232 over Cat5/Cat6 UTP up to 100m per the spec sheet; main trade-off: DB9 male to RJ45 female only - no female-DB9 end included.

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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.

Pros & Cons

Pros

  • ✓ Runs RS232 over Cat5/Cat6 UTP up to 100m per the spec sheet
  • ✓ No external power needed - passive DB9 to RJ45 pinout
  • ✓ Alloy port shells cut transmission impedance and interference

Cons

  • ✗ DB9 male to RJ45 female only - no female-DB9 end included
  • ✗ Vendor recommends 1-15m for reliable data despite the 100m claim
  • ✗ Passive adapter, so no RS232 to TCP/IP conversion despite listing wording
  • ✗ Needs a matching adapter at the far end for most runs

Manufacturer description

DB9 Serial RS232 Port to RJ45 Cat5/Cat6 adapter, Interface: DB9 Male to RJ45 female; 9pin/8P8C.the adapter run RS232 data over long distances (up to 100m) using UTP Cat 5/ Cat6 cable to bridge the gap.Compatible with desktop computer, digital machine tools, PDA, bar code and other standard DB9 serial devices

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SpecPicks Verdict

SpecPicks scored XMSJSIY DB9 RS232 to RJ45 Extender using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. XMSJSIY'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

  • DB9 to RJ45 extender: used for TCP/IP network interface with serial port network function, support serial data and network data bidirectional transparent transmission.Compatible with desktop computer, digital machine tools, PDA, bar code and other standard DB9 serial devices, stable and reliable performance, support maximum distance 66ft.
  • The DB9 RS232 COM signal is transmitted over the network cable,When using this adapter, it is recommended to use within a distance of 1-15 meters.Requires no external power, easy and Convenient to use.
  • High quality alloy transmission port reduce the transmission impedance and interference,environmentally friendly PVC material, super wear-resistant, Integral injection molding. improve data transmission rate and transmission quality.
  • Interface: DB9 Male to RJ45 female; 9pin/8P8C.the adapter run RS232 data over long distances (up to 100m) using UTP Cat 5/ Cat6 cable to bridge the gap.
  • Special Note: Usually this product needs to be used in pairs, specifically divided into: female to female, male to female, male to male three kinds of situations. Can also be used alone.

Full Specifications

BrandXMSJSIY
Color2-Adapter
Model755641611596
InterfaceDB9 Male to RJ45 female; 9pin/8P8C.the adapter run RS232 data over long distances (up to 100m) using UTP Cat 5/ Cat6 cable to bridge the gap.
Cable TypeEthernet
Unit Count1 Count
Item Length66 feet
Connector TypeRJ45
Number of Pins9
Number of Items2
Special FeatureHigh Speed
Connector GenderFemale-to-Female, Male-to-Female, Male-to-Male
Compatible DevicesPC
Indoor Outdoor UsageIndoor
Compatible Phone ModelsNo Compatible Phone Models
Ethernet Cable CategoryCat 5
Recommended Uses For ProductConnecting serial devices to a network, Extending serial data transmission range, Facilitating data transfer between serial devices and a network
Other Special Features of the ProductHigh Speed

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DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45-2pcs 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.

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DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45-2pcs
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