Characters in call menus

Hi all,
With call menus I need some information regarding how to use call menu options A,B,C,D. How to give these characters as DTMF digits.
VERSION: 2.2.0-222
BUILD: 91031-1232
With call menus I need some information regarding how to use call menu options A,B,C,D. How to give these characters as DTMF digits.
VERSION: 2.2.0-222
BUILD: 91031-1232