Been doing some research and not sure if this can be done. A lot of phone systems can pause / delay after dialling a tone to then enter a conference code .

01253132456,,,1234#

There's a forum post from April 2014 ..
"Is there a way to automatically send DTMF digits after the call is connected?
Example:   
Setup a phonebook entry like 8003214321,1234#
that when used will: connect to 800-321-4321, wait one second after connect, then send DTMF digits: 1234#"

With a reply saying it can't be done.

BUT in the change log it says

"1.92 
Fix: increasing delay for conferences"

Has the functionality been introduced ?

Great  

Is there any particular setting ? 
Is it a comma , that I should use in the phonebook entry ?