Specifications

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Cisco Unity Express Voice-Mail and Auto-Attendant CLI Administrator Guide for 3.0 and Later Versions
OL-14010-09
Chapter 5 Configuring System Components
Configuring SIP Call Control Parameters
From the GUI, select Voice Mail > Message Waiting Indicators > Settings to configure the MWI
notification option.
Outcall Notification (Not Available in Cisco SRST Mode)
Only Cisco Unified CME can use the SIP outcall mechanism for generating MWI notifications. Outcall
will not work in Cisco SRST mode.
Note If the MWI notification option is outcall, configure the MWI on and off extensions. See
“Configuring the MWI On and Off Extensions (Not Available in Cisco SRST Mode)” on
page 12.
The outcall option is available for backward compatibility. We recommend that you use either
sub-notify or unsolicited for the MWI notification option.
To use the outcall option, Cisco Unified CME must configure two ephone-dns that are registered to
receive MWI notifications as follows:
ephone-dn 30
number 8000....
mwi on
.
.
ephone-dn 31
number 8001....
mwi off
Note The number of dots in the above example must be equal to the extension length of the phones connected
to Cisco Unified CME.
Sub-Notify Notification
Both Cisco Unified CME and Cisco Unified Communications Manager in SRST mode can use the
sub-notify mechanism for generating MWI notifications. With this mechanism, the MWI notifications
will reflect the accurate status of messages in a subscriber’s voice mailbox.
After an ephone-dn is configured with the sub-notify option, Cisco Unified CME sends a Subscribe
message to Cisco Unity Express to register the phone for MWI notifications. When a new voice message
arrives in the voice mailbox for the ephone-dn, Cisco Unity Express updates the MWI status. If Cisco
Unity Express does not receive the Subscribe message for the ephone-dn, Cisco Unity Express will not
update the MWI status when a new message arrives.
To use the sub-notify option, Cisco Unified CME must configure each ephone-dn that is registered to
receive MWI notifications as follows:
For Cisco IOS Releases Prior to 12.3(11)T7
sip-ua
.
.
mwi-server ipv4:10.100.9.6 transport udp port 5060
number 2010
.
ephone-dn 35
mwi sip