Cisco SRW248G4 console port Problem

Hello Experts

I want to configure my SRW248G4 switch from 3Anetwork.com thru console port Cisco Switches Price. Unfortunately in this switch there is no RJ45 console port input, I can only see cosole port that is look like RS232 input. I bought two standard cisco console cables that have one end with db9 and one with RJ45.

Now I have and idea to put one end of one cable (db9) to switch, and one end (db9) of second cable in my computer (COM input/output)

II know how pinout in my computer look like but i can't find pinout of console port in my SRW248G4. There is many pictures in Internet, for many Cisco devices but this isn't working. Maybe in LINKSYS pinout look different ?

The supplier 3Anetwork.com can help but their technical support charge is a bit high,WS-C3750X-48T-S so I would prefer to do by myself.

Thanks for your help.