Google recently made it possible to connect Google Voice phone calls through Hangouts on the web.
When using Google Voice in a desktop browser, the phone tool now lists Hangouts as an option when making calls. Googler Alex Wiesen explained that it works even if the user isn’t using Hangouts in Gmail, and it doesn’t require a Google+ account. The change does not apply to either the Android or iOS mobile apps.
Google Voice has been neglected of late and its future as a Google service is in question. This recent change marks another transitional step for the service, and expands the functionality of Google Hangouts.