[Asterisk-Users] Limit the call & recording when pressing *1

[Luki]

> exten => 21,1,Dial(${phone1},20,r,L(5[:4][:1]))

I think should be:
exten => 21,1,Dial(${phone1},20,r,L(5:4:1))

The [] mean the parameter is optional, but you don't use them when
specifying the values.

--Luki