My understanding of current SIP MWI handling is:<br>- no matter if an endpoint subscribed to receive message summaries, Asterisk will a summary to it if sip.conf mailbox entry is filled.<br>- I couldn't find any SIP hardphone setting (i used a Thomson ST2030), that would make the hardphone send a SUBSCRIBE without rejecting corresponding NOTIFYs from Asterisk (I confess I didn't spend much time in my trials).<br>
<br>bottom line:<br>- I set the phone not to send any SUBSCRIBE as it accepted default NOTIFYs from Asterisk and rejected any custom NOTIFYs I could build.<br><br>Hope this helps ...<br>