Thank you, that’s pretty cool and I didn’t know. When my hylafax dials fax-out context in asterisk, my phone activates paging and I can hear the ongoing fax!
Now my dialplan looks like this:
[fax-out]
exten => _0.,1,NoOp(Sending call to ${EXTEN})
same => n,Originate(Local/2000@outgoing,exten,outgoing,555,1)
same => n,Set(DEVICE_STATE(Custom:555)=INUSE) ; Hint for ChanSpy BLF
same => n,Set(CALLEEID=${EXTEN})
same => n,Set(CALLEEID=${CALLEEID:1})
same => n,Set(CALLEEID=+1${CALLEEID})
same => n,Set(CLEANED_NUMBER=${EXTEN})
same => n,Set(FAXOPT(gateway)=yes)
same => n,Set(CALLERID(num)=+1 23 45 67 89)
same => n,Set(NEW_EXTEN=0${EXTEN:1})
same => n,Dial(PJSIP/${NEW_EXTEN}@fax-out,20)
same => n,Hangup()
exten => h,1,Set(DEVICE_STATE(Custom:555)=NOT_INUSE)