[general]
static=yes
writeprotect=no
context=inbound

...

[macro-mf]
exten => s,1,GoSub(mf-tones,${MACRO_EXTEN}0,1)
exten => s,n,Playtones(mfst)
exten => s,n,Wait,.1

[mf-tones]
exten => _X!,1,Playtones(mfkp)
exten => _X!,2,Wait,.1
exten => _X!,3,NoOp(${EXTEN})
exten => _X!,4,Playtones(mf${EXTEN:0:1})
exten => _X!,5,Wait,.1
exten => _X!,6,GosubIf($[${LEN(${EXTEN})} != 2]?mf-tones,${EXTEN:1},3:7)
exten => _X!,7,Return

...

[mainmenu] ; Calling context
; Main menu music
exten => s,1,Answer
exten => s,2,ResponseTimeout(10)
exten => s,n,DigitTimeout(2)
exten => s,n,BackGround(buttes/music/intro-pt1)
exten => s,n,BackGround(buttes/music/intro-pt2)
exten => s,n,Goto(mainmenu,s,3)

exten => t,1,Goto(mainmenu,s,2)
exten => T,1,Hangup

exten => _X.,1,Macro(mf)
exten -> _X.,2,Goto(destinations,${EXTEN},1)

...

LOG FOLLOWS

    -- Executing Answer("SIP/tehdely-af400e78", "") in new stack                                                                                                                                                 
    -- Executing ResponseTimeout("SIP/tehdely-af400e78", "10") in new stack                                                                                                                                      
    -- Set Response Timeout to 10                                                                                                                                                                                
    -- Executing DigitTimeout("SIP/tehdely-af400e78", "2") in new stack                                                                                                                                          
    -- Set Digit Timeout to 2                                                                                                                                                                                    
    -- Executing BackGround("SIP/tehdely-af400e78", "buttes/music/intro-pt1") in new stack                                                                                                                       
    -- Playing 'buttes/music/intro-pt1' (language 'en')                                                                                                                                                          
  == CDR updated on SIP/tehdely-af400e78                                                                                                                                                                         
    -- Executing Macro("SIP/tehdely-af400e78", "mf") in new stack                                                                                                                                                
    -- Executing Gosub("SIP/tehdely-af400e78", "mf-tones|310|1") in new stack                                                                                                                                    
  == Channel 'SIP/tehdely-af400e78' jumping out of macro 'mf'                                                                                                                                                    
    -- Executing PlayTones("SIP/tehdely-af400e78", "mfkp") in new stack                                                                                                                                          
    -- Executing Wait("SIP/tehdely-af400e78", ".1") in new stack                                                                                                                                                 
    -- Executing NoOp("SIP/tehdely-af400e78", "310") in new stack                                                                                                                                                
    -- Executing PlayTones("SIP/tehdely-af400e78", "mf3") in new stack                                                                                                                                           
    -- Executing Wait("SIP/tehdely-af400e78", ".1") in new stack                                                                                                                                                 
    -- Executing GosubIf("SIP/tehdely-af400e78", "1?mf-tones|10|3:7") in new stack                                                                                                                               
    -- Executing NoOp("SIP/tehdely-af400e78", "10") in new stack                                                                                                                                                 
    -- Executing PlayTones("SIP/tehdely-af400e78", "mf1") in new stack                                                                                                                                           
    -- Executing Wait("SIP/tehdely-af400e78", ".1") in new stack                                                                                                                                                 
    -- Executing GosubIf("SIP/tehdely-af400e78", "0?mf-tones|0|3:7") in new stack                                                                                                                                
    -- Executing Return("SIP/tehdely-af400e78", "") in new stack                                                                                                                                                 
    -- Executing Return("SIP/tehdely-af400e78", "") in new stack                                                                                                                                                 
    -- Executing Return("SIP/tehdely-af400e78", "") in new stack                                                                                                                                                 
    -- Executing PlayTones("SIP/tehdely-af400e78", "mfst") in new stack                                                                                                                                          
    -- Executing Wait("SIP/tehdely-af400e78", ".1") in new stack                

...

Execution stops here.  Dialed digits will trigger extensions in the macro context.  This is out of spec.