Hello all, I have an Asterisk installation with Kamailio using realtime integration. I have gotten my clients to register, but there is something odd about the sip message flow with some of my clients. My clients are Zoiper and Asterisk is 11.10.2.
When I set 'Subscribe to MWI' value to 'both', after a normal, successful registration Asterisk begins to send REGISTER messages to Kamailio every 105 seconds. Kamailio responds with 200 OK. If I set the value to 'disabled', Asterisk does not send these frequent REGISTER messages. Probably due to these REGISTERs Kamailio sees 2 AORs for the account for those clients whose 'Subscribe to MWI' setting is defined as 'both'. I know this is mostly not an Asterisk problem, but I'd like to understand better what exactly makes Asterisk to react this way? I didn't find any differences in the SIP messages during registration (I could be just blind though...), or in the way the clients are set up in the Realtime db. On the 'Subscribe to MWI' setting the Zoiper documentation states: "this tag specifies when Zoiper is going to subscribe for Message Waiting Indication(MWI) for this account". In addition to values 'both' and 'disabled' there are values 'before registration (Asterisk)' and 'after registration'. To me it seems strange to use REGISTER messages for subscribing to something related to voicemail messages. So far I haven't learned about the way Asterisk handles voicemail stuff but if You guys have some clarification on why I'm getting these results I'd appreciate it! cheers, Olli
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