I have an Asterisk behind an OpenSIPS proxy. The proxy handles registrations and also SIP SUBSCRIBE for MWI. The Asterisk are configured to send NOTIFY to the proxy even when the SUBSCRIBE haven’t been received. I can configure a user in sip.conf that works:
host=xxx.xxx.xxx.xxx (IP of proxy)
Every time a voicemail has been left in the mailbox 1234@customer, a NOTIFY is sent off to the proxy. Remember, the peer doesn’t register or send SUBSCRIBE to Asterisk, but “subscribemwi=no” forces NOTIFY to be sent anyway.
However, I am struggling to get the same thing working for Realtime peers. I have “rtcachefriends=yes” set in sip.conf. But I never see the peer loaded from database and no NOTIFY is ever sent.
Is it possible to user Realtime this way? What will trigger loading of the peer?