Which menu option should be selected to add a desk phone as an endpoint in Cisco Unified Communications Manager?

The Application menu is used for configuring Cisco Unified applications such as Cisco Unified Mobility and CTI route points, not physical phone endpoints.

The Device menu in CUCM contains the Phone sub-menu, which is the correct path for adding, configuring, and managing IP phone endpoints. CUCM organizes all endpoint hardware - including IP phones, soft clients, and gateways - under the Device category. Selecting Device > Phone and clicking Add New allows an administrator to register a desk phone by choosing its model and configuring its settings.

The System menu manages global configuration objects such as enterprise parameters, server settings, and device pools, not individual endpoint additions.

User Management handles end-user and application-user accounts for authentication and permissions, not adding phone hardware.

Media Devices is not a standard top-level CUCM menu - media resources such as Music on Hold are managed under Media Resources, which does not include IP phones.