Alerts not working on digium phones configured with DPMA

Ran into this a while ago and it seems the issue is back.

Can’t get Digium phones (D62, D40, D70) to accept alert info and play the proper ringtone.

The phones are set up with the Digium Phones module, not EPM. I’ve tried all iterations of alert info settings:

so if the alert is called “alarm” in the Alert Info field of the Digium Phones Module: Alerts I’ve tried:

alarm
Alert-Info:alarm
Alert-Info:http://127.0.0.1;info=alarm

I’ve tried with both on and off for Enforce RFC7462

with Enforce RFC7462 off the asterisk logfile looks like this for a ring group call with the alarm alert set:

[2020-11-30 18:18:06] VERBOSE[30985][C-0000007a] pbx.c: Executing [[email protected]:4] Set("SIP/222-0000014d", "SIPHEADERKEYS=Alert-Info") in new stack
[2020-11-30 18:18:06] VERBOSE[30985][C-0000007a] pbx.c: Executing [[email protected]:7] ExecIf("SIP/222-0000014d", "0?SIPRemoveHeader(Alert-Info:)") in new stack
[2020-11-30 18:18:06] VERBOSE[30985][C-0000007a] pbx.c: Executing [[email protected]:8] ExecIf("SIP/222-0000014d", "1?SIPAddHeader(Alert-Info:alarm)") in new stack
[2020-11-30 18:18:06] VERBOSE[30985][C-0000007a] pbx.c: Executing [[email protected]:4] Set("SIP/224-0000014e", "SIPHEADERKEYS=Alert-Info") in new stack
[2020-11-30 18:18:06] VERBOSE[30985][C-0000007a] pbx.c: Executing [[email protected]:7] ExecIf("SIP/224-0000014e", "0?SIPRemoveHeader(Alert-Info:)") in new stack
[2020-11-30 18:18:06] VERBOSE[30985][C-0000007a] pbx.c: Executing [[email protected]:8] ExecIf("SIP/224-0000014e", "1?SIPAddHeader(Alert-Info:alarm)") in new stack

with Enforce RFC7462 turned on the alert info looks like this:

`[2020-11-30 18:30:50] VERBOSE[1996][C-00000081] pbx.c: Executing [[email protected]:10] ExecIf("SIP/224-00000166", "1?SIPAddHeader(Alert-Info:<http://127.0.0.1>;info=alarm)") in new stack`

in which case I place http://127.0.0.1;info=alarm into the Alert Info field in the Digium Phones: Alerts config.

nothing seems to work.

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