[asterisk-users] Voice mail: MWI problem / pjsip (13.24.0)

[Michael Maier]

Hello!

I'm facing a problem concerning MWI. The problem is:

The phone switches off the MWI exactly at the moment the second NOTIFY package for one voice mail
arrives.

The phone switches off MWI independently if the voice mail has been acknowledged or not before.


The behavior in detail:

- Once each hour, phone sends SUBSCRIBE
- Asterisk receives incoming voice mail for Device 200.
- some time later: Phone executes a REGISTER
- Directly after succeeded REGISTER, asterisk sends Notify
- Notify is acked by phone



The content of the packages

----------------------------------------------------------------------
SUBSCRIBE

Contact: <sip:1234 at 192.168.16.73:7594>
User-Agent: C610 IP/42.231.00.000.000
Event: message-summary
Expires: 3600
Allow: NOTIFY
Accept: application/simple-message-summary
Content-Length: 0


SIP/2.0 200 OK
Expires: 3600
Contact: <sip:192.168.16.70:5060>
Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, REGISTER,
REFER, MESSAGE
Supported: 100rel, timer, replaces, norefersub
Server: FPBX-13.0.195.19(13.24.0)
Content-Length:  0
----------------------------------------------------------------------



After REGISTER:

----------------------------------------------------------------------
NOTIFY

Contact: <sip:1234 at 192.168.16.70:5060>
Call-ID: 7a5ee160-47a1-4efa-b190-66843d644243
CSeq: 9921 NOTIFY
Subscription-State: terminated
Event: message-summary
Allow-Events: message-summary, presence, dialog, refer
Max-Forwards: 70
User-Agent: FPBX-13.0.195.19(13.24.0)
Content-Type: application/simple-message-summary
Content-Length:    49

Messages-Waiting: yes
Voice-Message: 1/1 (0/0


SIP/2.0 200 OK
Call-ID: 7a5ee160-47a1-4efa-b190-66843d644243
CSeq: 9921 NOTIFY
User-Agent: C610 IP/42.231.00.000.000
Content-Length: 0
-----------------------------------------------------------------------

=> MWI on!

-> That was expected!



Now happens next REGISTER and after this, the next NOTIFY (the same as shown above) is sent to the
phone

=> MWI is switched off!



If there coincidentally is a NOTIFY sequence in between ending with

Messages-Waiting: no
Voice-Message: 0/0 (0/0)
------------------------
Messages-Waiting: yes
Voice-Message: 1/1 (0/0

the MWI will be active again (this may be achieved if mwi aggregation is turned off and the order is
exactly as shown above - but that's chance).




I'm wondering now: what's the generally expected behavior? Should the phone handle repeatedly sent
NOTIFY packages for same voice mail as if they had been sent once or should asterisk signal the same
voice mail only once and not repeatedly?


Configuration:

pjsip.aor.conf:
[1234]
mailboxes=1234 at default

pjsip.endpoint.conf
[1234]
aggregate_mwi=yes or no



Thanks,
kind regards,
Michael