[mymenu]

exten => s,1,Answer
exten => s,2,Background(call)
exten => s,3,Set(TIMEOUT(response)=15)
exten => s,4,Set(TIMEOUT(digit)=3)

exten => 11,1,Dial(SIP/0573,20,tm)

exten => 22,1,Dial(H323/0123,20,tm)

exten => 33,1,Dial(SIP/2727,20,tm)

exten => 44,1,MusicOnHold,default

exten => t,1,Dial(SIP/0573,20,tm)
exten => t,2,Hangup

[sippeer]
exten => 8456944553,1,Goto(mymenu,s,1)