[sipgate_in]
exten => 2140753e0,1,Goto(CompanyPBX,s,1)
exten => 2140753e0,n,Hangup

[sipgate_out]
exten => _X.,1,Hangup

[CompanyPBX]
exten => s,1,Answer(500)
   same => n(loop),SayDigits("1 2 3 4 5 6 7 8 9 0")
   same => n,WaitExten()

exten => 1,1,Playback(you-entered)
   same => n,SayNumber(1)
   same => n,Goto(s,loop)

exten => 2,1,Playback(you-entered)
   same => n,SayNumber(2)
   same => n,Goto(s,loop)