; This context allows last call return
[last-call-return]
exten => s,1,Answer
exten => s,2,Wait(1)
exten => s,3,Playback(last-num-to-call)
exten => s,4,set(number=${DB(lastcaller/${CALLERID(num)})}) ; goto 105 if no lastcaller
exten => s,5,GotoIf($["${number}"=""]?105) ; also if it's blank (caller id blocked)
exten => s,6,SayDigits(${number})
exten => s,7,Wait,1
exten => s,8,Playback(to-call-num-press)
exten => s,9,Playback(digits/1)
exten => s,105,Playback(unidentified-no-callback)
exten => s,106,Hangup

exten => 1,1,Dial(SIP/${number}@callcentric)