Hello,
I have a CCR1009, and want to connect to the console port using a Cisco console cable which has male RJ-45 connector on one end. The other end has a USB connector for connection to my laptop.

This is my console cable, https://www.amazon.com/gp/product/B01AF ... UTF8&psc=1.

I have a female DB-9 to female RJ45 adapter that I need to wire. Given that the Cisco console cable is rolled aka null-modem, am I correct in thinking that for the DB-9 to RJ45 I just go pin to pin. Thanks,
Gary

The cable you linked won't do. It's essentially only converting from proper USB connector to RJ45 connector. But doesn't do anything about protocol conversion and if you plug the USB end into a computer, then RJ45 will still "talk" USB.

The problem with RJ45 console cables is that they largely abuse RJ45 socket for anything some engineer comes up with. It all started with using it for serial (RS232) connections where the other end of cable had a DB9 connector attached.

But I don't see how you can use the Cisco cable you linked with DB9 to RJ45 conversion you're talking about later on. You can not construct a "double conversion" cable (i.e. DB9 - RJ45 and RJ45 - USB) and use it to connect to CCR1009, MT uses proper RS232 on their DB9 connectors. So if you want to connect that to USB port of your computer, you need a proper RS232 to USB converter, like this one (it's got active circuit inside DB9 connector, it's not simple wiring).

Actually that cable seems like having a FT232chip inside, so it is a USB to serial RS232 converter (by another name) allright.

@OP
No, the normal pionout of a DB9 (serial) connector is this one:
https://www.cable-tester.com/rs232-pin-out/
https://www.betterbox.co.uk/serial-interfaces.html
The numbering is confusing, it depends on how the direction is implied (DTE/DCE):
https://electronics.stackexchange.com/q ... elative-to
RX (or TX) is 2
TX (or RX) is 3
ground is 5

On your cable converter they are:
3 and 6 ( or 6 and 3)
ground is both 4 and 5

There is an explicit diagram for RJ45/DB9 for Mikrotik (Cisco stryle)
https://wiki.mikrotik.com/wiki/Manual:S ... al_Console

Thanks Jaclaz.

I saw that page and it confused me. The CCR1009 has a male DB-9 connector for the console connect.

I'm thinking that I need to use the first chart listed in the "Serial Console Configuration". And for column 4, "Side (DB9f)", should be the pinout that matches my cable.

You should need only 3 connections:
TX
RX
Ground

The TX is on wire 3 of the RJ-45 and goes to pin 2 (RX) of the DB-9 (female) connector
The RX is on wire 6 of the RJ-45 and goes to pin 3 (TX) of the DB-9 (female) connector
The Ground is on wires 4 and 5 of the RJ-45 and go both to pin 5 (Ground) of the DB-9 (female) connector

This image should be easier to follow:
https://m.media-amazon.com/images/I/61F ... L1002_.jpg

You may use this kind of products, I guess.
https://www.amazon.com/StarTech-com-Ser ... 00006IRQA/

I made a same adapter for same purpose before. (not for exact MikroTik devices, but for some other stuffs.)

You need straight connection, surely. This is the pin-assignment that I used.
flipped view (same straight connection).
Just one GND connection is enough.

Thanks for everyone's help especially TRKK. TRKK saved me the time of doing the mapping.

I finally had time to come back to this.