exten => 123,1,Answer
Exten => 123,2,Background(enter-num-to-call)

Exten => _X.,1,Dial(SIP/${EXTEN}@my_provider,45,H)

exten => h,1,noop(we went to h)
Exten => h,2,Goto(123,1)

For some reason after going through H extension the call goes back to exten 123 but if I enter in dtmf the call hangs up