SUBSCRIBER = 10D DN
DOMAIN = MS Virtual IP (i.e. 101)
SENDER = The DN for Message Services (i.e. the 10D DN that *98 or whatever class code you choose is mapped to)
!IP! = The IP Address of the Configured SIP Binding for Voicemail


NOTIFY sip:!SUBSCRIBER!@!DOMAIN! SIP/2.0
Via: SIP/2.0/UDP !IP!:5060
From: <sip:!SENDER!@!IP!>
To: <sip:!SUBSCRIBER!@!DOMAIN!>
Contact: <sip:!SENDER!@!IP!>
Call-ID: 1234567890@!IP!
CSeq: 1 NOTIFY
User-Agent: VoiceMail
Event: message-summary
Content-Type: application/simple-message-summary
Content-Length: !CONTENT_LENGTH!

Messages-Waiting: !HAS_MESSAGE!
Voicemail: !NEW_COUNT!/!OLD_COUNT!