Figured out what I did wrong:
For PJSIP to set the header ahead of time it is necessary to have Set(PJSIP_HEADER… invoked as part of the actual Dial command. Specifically, as the asterisk documentation *did* indicate when I read more closely, you need to add a pre-dial subroutine call to your Dial command for this to work right. For me, this meant adding the b() option to the Dial options already being specified. Thus, this is my revised Dial command inside sub-local-call in the 20-baseplan.conf file:
…
same => n,Dial(${DIAL_STRING},${RING_TIME},b(sub-pjsip-add-headers^s^1())${DIAL_OPTIONS})
…
[sub-pjsip-add-headers]
exten => s,1,NoOp(Add PJSIP headers before initiating outgoing call)
same => n,GotoIf($[“${PJALERTINFO}”=””]?skipHeaders);
same => n,NoOp(ADDING CUSTOM RING TYPE HEADER FOR PJSIP)
same => n,Set(PJSIP_HEADER(add,Alert-Info)=${PJALERTINFO});
same => n(skipHeaders),Return()
Then if I set PJALERTINFO in the code wherever I want distinctive ring tones it will insert that variable as the value for Alert-Info for all targets of the call. Otherwise the Dial command just has an extra subroutine called that doesn’t do anything (leaving the ring tone the same)
Hope this helps someone else out there… 🙂
Also – this needs to be added to the VitalPBX base code in some form since otherwise the Alert-Info field for inbound routes is ineffectual for PJSIP users (right now it only inserts the SipAddHeader version for SIP users)
-Michael
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