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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RJ45 to RS232 Cable, DB9 9-Pin Serial Port Female&Male to RJ45 Female Cat5/6 Ethernet LAN Console（15CM/6Inch） 2Pack

Product ID: 66455383

Details

Brand
zdyCGTime
Connector Type
RJ45
Cable Type
Ethernet
Compatible Devices
Monitor PC
Special Feature
DB9 9-Pin Port

💸Cost-saving CAT5 cable compatibility

🔄Pair-only operation for secure connection

🔌15cm compact length

€ 20.29

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Elevate your serial connections with sleek, smart pairing!

COMPACT CONVENIENT - 15cm length fits tight setups without clutter
PAIR EXCLUSIVE DESIGN - Works only in pairs for guaranteed signal integrity
COST EFFICIENT CABLING - Leverages affordable CAT5/6 cables over bulky DB9 wires
PLUG PLAY SIMPLICITY - No external power needed—just connect and go
VERSATILE CONNECTIVITY - Seamlessly links DB9 serial ports to RJ45 Ethernet interfaces

This 2-pack RJ45 to RS232 cable set features 15cm DB9 to RJ45 connectors designed exclusively for paired use, transmitting RS232 signals over CAT5/6 cables without external power. Ideal for professionals seeking streamlined, cost-effective serial port connections in compact spaces.

Specifications

ASIN	B07DCPVLBC
Best Sellers Rank	#85 in Serial Cables
Brand	zdyCGTime
Color	BLACK
Customer Reviews	4.4 4.4 out of 5 stars (327)
Date First Available	May 29, 2018
Item Weight	2.82 ounces
Item model number	8541684836
Manufacturer	zdyCGTime
Package Dimensions	6.57 x 4.21 x 0.98 inches
Standing screen display size	7 inches

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€ 20.29

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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 Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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