4 thoughts on - PJSIP Add Header Not Working

• The PJSIP_HEADER dialplan function operates on the channel it is invoked on. In this case you are using it on the caller, not the called party. The wiki documentation[1] includes an example of how to apply it to an outgoing call.

  [1]
  https://wiki.asterisk.org/wiki/display/AST/Asterisk+13+Function_PJSIP_HEADER

• Hi,

  Following some new behaviour on PJSIP, adding SIP header must be done using a subrouting. Please find below my working configuration:

  *[subroutine]exten => caller_handler,1,NoOp()same
  =>n,Set(PJSIP_HEADER(add,X-CID)=${ARG1})same => n,Return()*

  and then, add new parameters on Dial command: *same
  =>n,Dial(PJSIP/${EXTEN}@,,b(subroutine^caller_handler^1(${SIPCALLID})))*

  The first “*b*” before parenthesis gave direction (if header must be added to caller or callee). More information on https://wiki.asterisk.org/wiki/display/AST/Asterisk+12+Function_PJSIP_HEADER
  .

  Regards.

  2017-10-02 17:06 GMT+02:00 Andre Gronwald :

• Andre

  For this to work we have had to go to using the b() option in the dial legs for the calls that are pasting up. You call a context that gets run before the calls are made on each channel. This allows you to add headers to the new pjsip channels. It works well. You can also set variables with the _ option to trigger which headers you want to add..

  The example below would add “ThisHeader”, “ThatHeader” and “Call-Info” to the new channel created in the dial. You could use combinations of other variables and augment these methods to meet almost any need.

  Exp

  [OutboundDial]
  exten => _XXXXXXXXXX,1,NoOp(Dial Exp)
  exten => _XXXXXXXXXX,n,Set(_var1setinparrent=1) ;;Set Variable so that when you call the b() option context in your dial the first header is added exten => _XXXXXXXXXX,n,Set(_var2setinparrent=1) ;;Set Variable so that when you call the b() option context in your dial the second header is added
  exten => _XXXXXXXXXX,n,Set(_varAddSessionInparrent=1) ;;Set Variable so that when you call the b() option context in your dial the second header is added

  exten =>
  _XXXXXXXXXX,n,Dial(pjsip/3332224444@vendortrunk,b(AddpjsipHeaders^s^1))

  [AddpjsipHeaders]
  exten =>s,1,Gosubif({“$[var1setinparrent}}”=”1”]?ThisHeader,1)

  exten =>s,n,Gosubif({“$[var2setinparrent}}”=”1”]?ThatHeader,1)
  exten
  =>s,n,Gosubif({“$[varAddSessionInparrent}}”=”1”]?addSessionCallInfo,1)

  exten => ThisHeader,1,Set(PJSIP_HEADER(add,ThisHeader)=ValueToSet)
  exten => ThisHeader,n,Return()

  exten => ThatHeader,1,Set(PJSIP_HEADER(add,ThatHeader)=ValuetoSet)
  exten => ThatHeader,n,Return()

  exten =>
  addSessionCallInfo,1,Set(PJSIP_HEADER(add,Call-Info)=\;answ er-after=0)
  exten => addSessionCallInfo,n,Return()

  Thanks

  Bryant Zimmerman (ZK Tech Inc.)
  616-855-1030 Ext. 2003

  ————————————–

• Thanks all for the help, I got a step ahead. But in this scenario I am not able to deliver call-id of call-leg a to call-leg b. Extension A is going to make an outbound trunk call:
  1. extension calls asterisk (call leg a, call-id 1234567890)
  2. asterisk makes outbound trunk call (call leg b, call-id abc123def456)
  Goal: Put call-id of call leg a in a separate header of call leg b or vice versa (I guess that makes more sense because I have more contorl of the headers inside of my pbx, right?).

  Following your suggestions I have now call-id b in a separate header of the same call-leg, but in call-leg a.

  regards, andre