Google Inc. has acquired Fremont, Calif.-based GrandCentral Communications, the provider of a Web-based platform that manages a user’s voice communications with a single interface. Terms of the deal - announced on Google’s official blog - were not disclosed.

GrandCentral’s service allows users to integrate all of their existing phone numbers and voice mailboxes into one online phone account.

Google will continue to beta test the GrandCentral service and support the company’s existing customers, GrandCentral’s Web site said. But as the technology is being transferred, a limited number of invitations will be available.