For example, the company CEO and directors prefer only receiving calls transferred by the secretary, some
special extensions are used on IP surveillance end points which should not be reached from external calls via
IVR for privacy reason. UCM has now added blacklist and whitelist in IVR settings for users to manage this.
Note: up to 500 extensions are allowed on the back/whitelist.
To use this feature, log in UCM Web GUI and navigate to Call Features→IVR→Create/Edit IVR: IVR
Black/Whitelist.
• If the user selects “Blacklist Enable” and adds extension in the list, the extensions in the list will not be
allowed to be reached via IVR.
• If the user selects “Whitelist Enable” and adds extension in the list, only the extensions in the list can be
allowed to be reached via IVR.
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