Without the addition of an external sever, which two applications does the Unified Communication Module...

The Unified Communication Module (UCM) supports the following applications without the addition of an external server:

one-X® Portal: This is a web-based application that provides users with access to their voicemail, call logs, and other communication features.

Embedded Voicemail: This is the voicemail solution that is built directly into the Avaya IP Office™ system and does not require an external server.