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Support XFINITY Voice My phone rings, but no one is there

Introduction

In most cases, this will occur when the previous call wasn’t completely disconnected.

Possible explanations

If you’ve completed a three-way call and pressed the flash button or the switchhook quickly to disconnect, this won’t completely disconnect the call. In addition, if you’ve called your voicemail or placed a call to an IVR system such as a bank and haven’t completely disconnected by hanging up, your phone may ring back as the line is still open. In all of these cases, you must hang up the phone in order for the call to be completely disconnected.

Find this article at:

http://customer.comcast.com/help-and-support/phone/phone-rings-but-no-one-is-there/