Which Cisco UCM configuration is required for SIP MWI integrations?

The correct answer is C. Enable "Accept unsolicited notification" on the SIP Trunk Security Profile. For SIP MWI integration between Cisco UCM and Cisco Unity Connection, UCM must be able to receive SIP NOTIFY messages that Unity Connection sends whenever a voicemail event occurs. Because Unity Connection sends these NOTIFY messages without UCM having first issued a SUBSCRIBE…

On-Premises Call Control

Question

Options

AEnable "Accept presence subscription" on the SIP Trunk Security Profile.
BSelect "Redirecting Diversion Header Delivery - Outbound" on the SIP trunk.
CEnable "Accept unsolicited notification" on the SIP Trunk Security Profile.
DSelect "Redirecting Diversion Header Delivery - Inbound" on the SIP trunk.

How the community answered

(22 responses)

A
5% (1)
C
91% (20)
D
5% (1)

Explanation

For SIP MWI integration between Cisco UCM and Cisco Unity Connection, UCM must be able to receive SIP NOTIFY messages that Unity Connection sends whenever a voicemail event occurs. Because Unity Connection sends these NOTIFY messages without UCM having first issued a SUBSCRIBE (they are unsolicited), the SIP Trunk Security Profile on the UCM side must have 'Accept Unsolicited Notification' enabled. Without it, UCM treats the incoming NOTIFY as invalid and rejects it, so the MWI lamp on the phone never changes state. The Redirecting Diversion Header options relate to call forwarding/redirect display features, not MWI.

Topics

#SIP MWI#Cisco UCM Configuration#SIP Trunk Security Profile#Message Waiting Indicator

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