What is the pin mapping from the rj45 to db9 pins?

I'm sorry but I don't know what the pin mapping is. Because they come as a matched pair of adaptors it didn't matter to me. I used one at each end of a standard 25 foot Cat5e patch cable to make a long DB9-Male to DB9-Female cable and it has been working with no problems for over 6 months. I have previously used other similar adaptors and as you probably suspect there is no standardization. That is why this matched set was appealing.

will this cable convert the signal, so that it can be seen on a computer monitor ?

The RJ45 to RS232 cable is not for video. A DSub15 is the standard connector for VGA video. RS232 is a serial data standard.

Will this work with any usb-rj45 cable with your adapter? so far i cannot get it to work. my cable usb-rj45 works fine, but this doesn't. any ideas

Your question does not make any sense in this context. You say your "cable USB-RJ45 works fine" but you asked this about an RJ45 to RS-232 adaptor. Why would you even expect it to work? RS-232 and USB have nothing in common.

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zdyCGTime RJ45 to RS232 Cable, DB9 9-Pin Serial Port Female&Male to RJ45 Female Cat5/6 Ethernet LAN Console（18CM/7Inch） 2Pack

Product ID: 167328644

Details

Brand
zdyCGTime
Connector type
RJ45
Cable type
Ethernet
Compatible devices
Monitor
Special feature
不缠结

💸Cost-saving CAT5/6 cable use

📏18cm compact length

🔌DB9 to RJ45 seamless signal

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Rp616902

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Streamline your serial connections with sleek, smart cabling!

PLUG PLAY READY - No complicated setup—just connect and enjoy reliable serial communication up to 15 meters.
DUAL CONNECTOR PACK - Includes both DB9 female-to-RJ45 and DB9 male-to-RJ45 cables for versatile connectivity.
COMPACT CONVENIENT - At just 7 inches, this cable fits perfectly in tight setups without clutter.
COST EFFECTIVE UPGRADE - Save money by replacing bulky DB9 cables with thinner, more flexible CAT5/6 cables.
EFFORTLESS SIGNAL TRANSMISSION - Transmits RS232 signals directly over Ethernet cables without external power or converters.

The zdyCGTime RJ45 to RS232 Cable 2-pack offers a compact 18cm length with DB9 9-pin serial ports converted to RJ45 female connectors, enabling RS232 signal transmission over standard CAT5/6 Ethernet cables. Designed for professional setups, it supports distances up to 15 meters without external power, simplifying cable management and reducing costs by replacing traditional DB9 cables with thinner, more flexible network cables.

Specifications

ASIN	B07DCPVLBC
Audio jack	Rj45
Best Sellers Rank	89,512 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 258 in Serial Cables
Colour	BLACK
Connectivity technologies	Ethernet
Customer Reviews	4.5 4.5 out of 5 stars (314)
Date First Available	29 May 2018
Item Weight	80 g
Item model number	8541684836
Other display features	Wireless
Package Dimensions	16.7 x 10.7 x 2.5 cm; 80 g
Special features	Tangle Free

Reviews

A**R

dans description, ca dit de lire le pinout mais vous la fournissez pas.

28.07.2025

B**C

Acquistati perché avevano il prezzo più basso tra quelli 'Amazon Prime'. Funzionano bene. Portano bene il segnale lungo un cavo ethernet CAT 7 di 30 metri.

6.02.2023

L**F

Funktioniert einwandfrei. Adapter funktioniert über Ethernetkabel, nicht über Ethernet. Aber das ist ja klar gewesen. Gute Ware.

16.04.2025

W**G

as described

20.05.2020

L**Z

No funciona

8.01.2020

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Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Indonesia.

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