Which type of message must an administrator configure in the SIP Trunk Security Profile for a Message Waiting Indicator light to work with a SIP integration between Cisco UCM and Cisco Unity…

The correct answer is C. Unsolicited NOTIFY. Message Waiting Indicator (MWI) between Cisco Unity Connection and Cisco UCM over SIP works by Unity Connection sending SIP NOTIFY messages to UCM whenever a voicemail is deposited or retrieved. These NOTIFY messages are 'unsolicited' because UCM never sent a SUBSCRIBE request…

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Question

Which type of message must an administrator configure in the SIP Trunk Security Profile for a Message Waiting Indicator light to work with a SIP integration between Cisco UCM and Cisco Unity Connection?

Options

ATCP port 5060
BSIP Register
CUnsolicited NOTIFY
D200 OK

How the community answered

(59 responses)

A
2% (1)
B
5% (3)
C
90% (53)
D
3% (2)

Explanation

Message Waiting Indicator (MWI) between Cisco Unity Connection and Cisco UCM over SIP works by Unity Connection sending SIP NOTIFY messages to UCM whenever a voicemail is deposited or retrieved. These NOTIFY messages are 'unsolicited' because UCM never sent a SUBSCRIBE request - Unity Connection initiates them proactively. For UCM to accept these messages, the SIP Trunk Security Profile used by the trunk toward Unity Connection must have 'Accept Unsolicited Notification' enabled. Without this setting, UCM will reject the NOTIFY messages and the MWI lights on IP phones will not illuminate.

Topics

#SIP MWI#Unsolicited NOTIFY#Cisco UCM Configuration#Voicemail Integration

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