How to access HP’s ILO remote console via SSH TEXTCONS VSP

Sometimes you need to direct remote the real-box (in this case HP server/iLO) due to remote access issue.
Beside remote console from the web based iLO, you could also access remote console via SSH

Step1 - ssh to the iLO's ip address

[root@server ~]# ssh user@ilo-ip-address
user@ilo-ip-address's password:
User:user logged-in to ILOXXXXXXX.(ilo-ip-address)
iLO 2 Advanced 2.33 at 14:56:47 Mar 20 2018
Server Name: host is unnamed
Server Power: On

</>hpiLO->

Step2 - there were 2 option of iLO ssh remote console, using TEXTCONS or VSP. 
Type help for more details,

</>hpiLO-> help
status=0
status_tag=COMMAND COMPLETED

...
...
...

HP CLI Commands:

POWER    : Control server power.
UID      : Control Unit-ID light.
NMI      : Generate an NMI.
VM       : Virtual media commands.
VSP      : Invoke virtual serial port.
VSP LOG  : Invoke virtual serial port data logging.
TEXTCONS : Invoke Remote Text Console on supported platforms.

Trying ssh remote console with TEXTCONS 

hpiLO-> TEXTCONS

Starting text console.
Press 'ESC (' to return to the CLI Session.

hpiLO-> 

Monitor is in graphics mode or an unsupported text mode.

You should get asked for login

Step3 - exit 

To exit press [Esc] + [ ( ]

Which is 'Esc' and '(' (open parenthesis)