[asterisk-users] Parsing incoming extension till first @

[Ali Jawad]

Hi All

When I dial a number it reaches the asterisk switch as abc at xyz@123.com
what I need to do is to parse the abc and send it to my pstn gateway
as in

exten => _.,2,Dial(SIP/${EXTEN}@pstn.gw)

this does work but I do have a varying number of numbers before the @

exten => _.,1,Dial(SIP/${EXTEN:0:12}@pstn.gw)

Well can I use some kind of regular expression to take all numbers
before the first @ and send them to the pstn

something like

exten => _.,1,Dial(SIP/${regexp(condition,Exten)}@pstn.gw)

thx