Cisco Systems SPA9000 manual Checking Voicemail from an External Number, Depositing Voicemail

Chapter 3 Configuring Voice Service and Voicemail

Managing Voicemail

Checking Voicemail from an External Number

The Internet voicemail service provider (IVMSP) may have an external number for their subscribers to call to check/manage their mailboxes. If this is not available, you may do one of the following:

•(a) assign a DID number (from the ITSP)

•(b) create a virtual extension for this purpose.

For method (a), specify a rule in the <Contact List> for the dedicated DID number. For the DID number 18005551000, this would look like the following example:

......18005551000:vmm3...

The syntax vmm<n> tells the SPA9000 to forward calls dialed to 18005551000 to the voicemail management URL on Line <n>. Because no particular mailbox is specified in this example, the caller is prompted to enter the voicemail number after the voicemail server answers. You may also specify a particular mailbox ID with this syntax (for example, vmm31234).

Method (b) is used in conjunction with the Auto-Attendant. For example, you can define a single-digit extension 7 to map to the voicemail management URL on Line 4, by adding a rule to <AA Dial Plan 1> or <AA Dial Plan 2> depending on which one you are using. The rule would look like the following:

<7:vmm4>

Again, you may also specify a particular mailbox in this syntax. For information about configuring the Auto-Attendant, refer to Chapter 5, “Configuring the LVS Auto-Attendant.”

Depositing Voicemail

An external caller can be triggered to deposit voicemail into a mailbox by sending it a REFER request during a call with <Mailbox Deposit URL> indicated in the REFER-TO header and the mailbox ID in the REFERRED-BY header. The caller device then sends INVITE to the <Mailbox Deposit URL> as shown in the example below:

INVITE sip:mailbox-deposit-url SIP/2.0

Via: SIP/2.0/UDP 24.35.36.111;branch=z9hG4bK-29752ae9

From: “External Caller” <sip:9991234@sip.myitsp.com>;tag=b99e21414928473o2

To: <sip:mailbox-deposit-url>

Call-ID: 69e9e3d9-cfcbe2bb@24.35.36.111

CSeq: 101 INVITE

Contact: <sip:9991234@24.35.36.111>

Referred-By: <sip:37683101@sip.myitsp.com>;ref=5041;mbid=7675

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 <sip:37683101@sip.myitsp.com>;tag=b99e21414928473o2;ref=5031

	Linksys SPA9000 Administrator Guide
3-22	Document Version 3.01