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Advanced Topics in SPA9000 Administration
Advanced Topics for SPA400 Voice Mail Service
SPA9000 Voice System Administration Guide 182
A
Subscribing to Voicemail Notification
The SPA9000 sends a one-time SUBSCRIBE for the message-summary event
package for each line with a valid <Mailbox Subscribe URL>. The SUBSCRIBE
implies subscription for the status of all the mailboxes associated with the
voicemail account used-ID; it does not include any mailbox ID in the request.
Following is an example:
SUBSCRIBE sip:mailbox-subscribe-url SIP/2.0
Via: SIP/2.0/UDP 172.16.22.23:5062;branch=z9hG4bK-44f9d0f0
From: Line 3 <sip:14089991003@sip.myitsp.com>;tag=ac6013983cce7526
To: <sip:mailbox-subscribe-url>
Call-ID: ace86200-bbe839de@172.16.22.23
CSeq: 63017
SUBSCRIBE Max-Forwards: 70
Contact: <sip:14089991003@172.16.22.23:5062>
Expires: 30
Event: message-summary
User-Agent: Sipura/SPA9000-3.2.2
Content-Length: 0
The voicemail server is expected to send a NOTIFY immediately upon receiving
this SUBSCRIBE message for each mailbox on this account. The Request-URI of
the NOTIFY should reference the CONTACT header of the corresponding
SUBSCRIBE, but the user-ID in the To header should be the mailbox ID. The
following example shows a NOTIFY for the mailbox ID 5031 on the account
14089991003:
NOTIFY sip:14089991003@172.16.22.23:5062 SIP/2.0
Via: SIP/2.0/UDP 178.178.221.230;branch=z9hG4bK-44f9d0f0
From: <sip:voicemail@sip.myitsp.com>;tag=ab789
To: <sip:5031@172.16.22.23:5062>;tag=ac6013983cce7526
Call-ID: ace86200-bbe839de@178.178.221.230
CSeq: 537
NOTIFY Expires: 30
Event: message-summary User-Agent: ITSP/Voicemail-Server
Content-Length: 0
Messages-Waiting: yes
Voice-Message: 2/8 (0/2)
NOTE Note that SPA9000 does not require the NOTIFY to be sent within the same
subscription dialog. That is, it accepts the NOTIFY even without a TO-tag or a
matching Call-ID as the original SUBSCRIBE.