In outbound routes i can prepend digits if a pattern successful match.
Please tell me how can i APPEND digits if a pattern successful match?
And can i make this in FreePBX or i have to create a custom trunk in a asterisk custom file?
That would depend on whether you want to send the terminating # before or after the call was answered, generally # is needed only to signal dialed digit has finished on an “open ended” dialstring, What is your particular “use case”?