Go back to 642-278 - Implementing CUCM for TelePresence Video Solutions Exam

Question :-

When assigning directory numbers to your Cisco TelePresence endpoints, which three of the following attributes, are applicable? (Choose three)
They should be reachable from the PSTN via direct inward dialing
They should be reachable from existing telephones within enterprise network
They should be reachable from other Cisco TelePresence customers via intercompany providers
They should be resolved via ENUM
They should always be simpler four-to-five-digit extension in order to make them easy to dial

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