MotherBoard JCOM to DB9 female
By , , 评论

Operating Hardware

Since there is a project to deploy a x86 VyOS as the router, After I install the system and I find out that I can use the console to connect to the system jusk like other Cisco(H3C) routers rather than using the screen.

However, The Cisco router are using RS232-RJ45 port, and I just spot that the H61 MotherBoard are using jcom jumper to the DB9 male port. And my USB-RS232 converter is also with the DB9 male port, so I'd like to make a jcom to DB9 female plan.

I just find out some jcom and DB9 information here,

jcom to DB9 male img

JCOM jumper on the motherboard

② RXD④ DTR⑥ DSR⑧ CTSEMPTY
① DCD③ TXD⑤ GND⑦ RTS⑨ RI

jcom jumper

JCOM line

First is red -> -> ->

①DCD ②RXD ③TXD ④DTR ⑤GND ⑥DSR ⑦RTS ⑧CTS ⑨RI

jcom line

As usual, when communicating via the RS232, a PC is as the DTE, but when I using the PC being the router, it is becoming the DCE, so it's essential to switch the RXD and TXD.

Front view

DB9 female Front view

Back view

DB9 Back view abstract

DB9 Back view

Finally, it works well with the Vyos Serial Console Mode.

VyOS Serial Console GRUB

VyOS Serial Console GRUB

VyOS Serial Console Systemctl

VyOS Serial Console Systemctl

VyOS Serial Console System

VyOS Serial Console System

The VyOS Router

1f63a

The VyOS Router

Ref:

https://wiki.vyos.net/wiki/Serial_console
https://help.ubuntu.com/community/SerialConsoleHowto
http://www.frontx.com/pro/cpx102_2.html