AT&T Inc. announced Tuesday that is rolling out cloud-based unified communications services.

AT&T Unified Communications Services includes two components: AT&T UC Central and AT&T UC Voice. AT&T UC Central integrates multiple communications and collaboration tools such as IM and chat; email, voice mail and unified messaging; Web, audio and video conferencing; VoIP calling and mobility with presence, behind a single user interface designed for both PCs and mobile devices. 

AT&T UC Voice provides IP telephony from the AT&T cloud and can be used both as a standalone service or integrated with AT&T UC Central. AT&T UC Voice is based on the Cisco Hosted Collaboration Solution (HCS) platform.