in my extension.conf I use a line like
exten => 75/0123,1,NoOp(provider callback destination)
do start a call back action if called on extension 75 from 0123.
I would like to change this to something like
exten => 75/_.123,1,NoOp(provider callback destination)
to match this line for 00123 as incoming number.
However, this pattern does not work nor did I find any reference to the '/' in the exten.