350-801 · Question #21
Which Cisco Unified communications manager configuration is required for SIP MWI integration?
The correct answer is D. Enable "Accept unsolicited notification" on the SIP Trunk security profile. Message Waiting Indicator (MWI) notifications are delivered from a voicemail system (such as Cisco Unity Connection) to CUCM via SIP NOTIFY messages that are sent without a prior SUBSCRIBE request - these are called unsolicited notifications. For CUCM to accept and process…
Question
Which Cisco Unified communications manager configuration is required for SIP MWI integration?
Options
- ASelect "Redirecting Diversion Header Delivery - Inbound" on the SIP trunk.
- BEnable "Accept presence subscription" on the SIP trunk security profile.
- CSelect "Redirecting Diversion Header Delivery - outbound" on the SIP trunk.
- DEnable "Accept unsolicited notification" on the SIP Trunk security profile.
How the community answered
(69 responses)- A3% (2)
- B12% (8)
- C4% (3)
- D81% (56)
Explanation
Message Waiting Indicator (MWI) notifications are delivered from a voicemail system (such as Cisco Unity Connection) to CUCM via SIP NOTIFY messages that are sent without a prior SUBSCRIBE request - these are called unsolicited notifications. For CUCM to accept and process these MWI NOTIFY messages arriving on a SIP trunk, the SIP Trunk Security Profile must have 'Accept Unsolicited Notification' enabled. Without this setting, CUCM will reject the incoming NOTIFY messages and MWI lamps on phones will not illuminate. 'Accept Presence Subscription' handles SUBSCRIBE/NOTIFY presence flows, and the Diversion Header options are for call forwarding scenarios, not MWI.
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