Hi,

>From recent experiences with 1.4.23.1, Asterisk doesn't need any incoming
MWI-related SUBSCRIBE message to send NOTIFY messages changing phones MWI
status.
This is fine for me but I'm wondering what if I were using SIP hardphones
refusing any such NOTIFY without prior SUBSCRIBE (does such phones exist ?)
?

1. In this case, which URI shall use a hardphone to build its SUBSCRIBE
message ?
Here is a hand written example.
Which value should I substitute to foo (in this example) to receive NOTIFY
(as if I had typed mailbox=7533 in sip.conf) ?
Obviously, typing 7533 gets a "Received SIP subscribe for peer without
mailbox: 7533" as if mailbox=7533 was not only used for MWI but also as a
check for a mailbox's existence (though corresponding mailbox is defined in
voicemail.conf).

 SUBSCRIBE sip:*[email protected]:5060;user=phone SIP/2.0

Via: SIP/2.0/UDP 192.168.100.193:5060
;branch=z9hG4bK8031919793092643643-24593

From: <sip:[email protected]:5060>;tag=c0a80101-600e

To: <sip:[email protected]:5060>

Call-ID: [email protected]

CSeq: 2 SUBSCRIBE

Max-Forwards: 70

Event: message-summary

Accept: application/simple-message-summary

Expires: 3600

Contact: <sip:[email protected]:5060;user=phone>

Allow-Events: refer,dialog,message-summary,check-sync,talk,hold

Authorization: Digest username="7533", realm="asterisk", nonce="2a533466",
uri="sip:[email protected]:5060;user=phone",
response="10d6fafe54a12319983a810938f55cd6", algorithm=MD5

User-Agent: THOMSON ST2030 hw5 fw1.64 00-1F-9F-16-22-AB

Content-Length: 0

2. What could be a benefit a using SUBSCRIBEs over not using them ?

Regards
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