Linksys SPA922 Cisco SPA9000 Voice System Administration Guide - Page 183

Advanced Topics in SPA9000 Administration Advanced Topics for SPA400 Voice Mail Service A In the last example, the caller is directed to deposit voicemail in the mailbox ID 7675 on the voicemail account 37683101. It further indicates that the directing station is at the internal extension 5041. Note that it is assumed that the caller device (or the ITSP) is faithfully relayed over the REFERRED-BY header. NOTE The mailbox ID must be set to the extension number. The INVITE sent for an internal caller to deposit voicemail is similar, except that the FROM header also includes a reference parameter, as shown in the following example: INVITE sip:mailbox-deposit-url SIP/2.0 Via: SIP/2.0/UDP 172.12.244.56;branch=z9hG4bK-29752ae9 From: Line 1 ;tag=b99e21414928473o2;ref=5031 To: Call-ID: [email protected] CSeq: 101 INVITE Max-Forwards: 70 Contact: Referred-By: ;mbid=7675 In the above example, the station wanting to deposit voicemail is at extension 5031; the mailbox ID is 7675 on the account 37683101 (for the station at extension 5041). Note that the referrer is the same as the caller in the last INVITE. In other words, this INVITE is self-triggered by the SPA9000. 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 is replaced by, respectively, the mapped DID number and the display name assigned to the phone. Furthermore, if an EXT-To-DID mapping exists for the called phone, the user-ID field of the REFERRED-BY header is also replaced by the mapped DID number for the called extension. NOTE For information about how to add an EXT-to-DID mapping, see the parameter in Appendix B, "SPA9000 Field Reference." SPA9000 Voice System Administration Guide 181