Linksys SPA922 Cisco SPA9000 Voice System Administration Guide - Page 181

How Voicemail Works, CSeq: 101 INVITE

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Advanced Topics in SPA9000 Administration Advanced Topics for SPA400 Voice Mail Service A How Voicemail Works When a user checks voicemail from a client station, the SPA9000 sends an INVITE on its behalf to the configured . For example: INVITE sip:mailbox-manage-url SIP/2.0 Via: SIP/2.0/UDP 192.168.2.205:5060;branch=z9hG4bK171eb6b5 From: ;tag=300704dd2590d20bo2;ref=5 031;mbid=53371 To: Call-ID: [email protected] CSeq: 101 INVITE Max-Forwards: 70 Contact: Here the client station is at extension 5031 and the mailbox ID is 53371. The voicemail server should then prompt the caller to enter a PIN and access the voicemail features for the given mailbox. A user should also be able to call an external number explicitly from anywhere to retrieve voice mail messages. When the voicemail server receives such a call, it should prompt the caller to enter the mailbox ID and then the PIN number. If the user-ID of the voicemail account cannot be uniquely identified from the mailbox ID or from the called number, the server must first prompt the user to enter the userID before proceeding. NOTE If an EXT-To-DID mapping exists for the calling extension on the line interface, the user-ID and display name fields of the FROM header are replaced by the mapped DID number and the display name assigned to the phone, respectively. In this case, a DIVERSION header similar to the REFERRED-BY header is also included. SPA9000 Voice System Administration Guide 179

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Advanced Topics in SPA9000 Administration
Advanced Topics for SPA400 Voice Mail Service
SPA9000 Voice System Administration Guide
179
A
How Voicemail Works
When a user checks voicemail from a client station, the SPA9000 sends an INVITE
on its behalf to the configured <Mailbox Manage URL>. For example:
INVITE sip:mailbox-manage-url SIP/2.0
Via: SIP/2.0/UDP 192.168.2.205:5060;branch=z9hG4bK-
171eb6b5
From:
<sip:[email protected]>;tag=300704dd2590d20bo2;ref=5
031;mbid=53371
To: <sip:mailbox-manage-url>
CSeq: 101 INVITE
Max-Forwards: 70
Contact: <sip:[email protected]:5060>
Here the client station is at extension 5031 and the mailbox ID is 53371. The
voicemail server should then prompt the caller to enter a PIN and access the
voicemail features for the given mailbox.
A user should also be able to call an external number explicitly from anywhere to
retrieve voice mail messages. When the voicemail server receives such a call, it
should prompt the caller to enter the mailbox ID and then the PIN number. If the
user-ID of the voicemail account cannot be uniquely identified from the mailbox ID
or from the called number, the server must first prompt the user to enter the user-
ID before proceeding.
NOTE
If an EXT-To-DID mapping exists for the calling extension on the line interface, the
user-ID and display name fields of the FROM header are replaced by the mapped
DID number and the display name assigned to the phone, respectively. In this case,
a DIVERSION header similar to the REFERRED-BY header is also included.