[asterisk-users] How to change SIP header TO: ?

Paul Mancheno H. pmancheno at gmail.com
Fri Jun 12 12:58:08 CDT 2020

Hello friends.

I have a softswitch in which I cannot create a list of blocked source
numbers; So, I have thought to use Asterisk and return a 302 message
when the number can make the call, my dialplan is as follows:

  exten => _AX.,1,Verbose(=======> ${CALLERID(num)} to ${EXTEN})
   same =>      n,Set(MYDESTINY=${REPLACE(${EXTEN},A,)})
   same =>      n,Set(MYORIGIN=${CALLERID(num)})
   same =>      n,GotoIf($[${ITEXISTS}>0]?black)
   ; I will try to change header TO:
   same =>      n,Set(MYHEADER=${PJSIP_HEADER(read,To)})
   same =>      n,Set(MYnewHEADER=${REPLACE(MYHEADER,A,)})
   same =>      n,Set(PJSIP_HEADER(update,To)=${MYnewHEADER})
   ; The previous block did not work because the INVITE message is not
sent altered
   same =>      n,Transfer(PJSIP/sip:B${MYDESTINY}@
   same =>      n,NoOp(Transferencia=${TRANSFERSTATUS})
   same =>      n,Goto(end)
   same =>      n(black),Verbose(Fraudulento)
   same =>      n,Answer()
   same =>      n,Playback(bye)
   same =>      n,HangUp()
   same =>      n(end),Verbose(Terminado)

What I need is to be able to change the TO: header so that the
softswitch receives the number without the prefix "A" because even
though the call is completed efficiently I am having trouble with the
billing (which belongs to the softswitch).

Please can you help me and tell me how I can change the header TO: of
the message "302" (sent by the Transfer method).


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