No text labels or alt text for keyboard accessibility

Lots of buttons and controls both on the RingCentral application on windows and on the website have no text labels or alt text and they can not be used with the keyboard. http://w3.org/WAI and http://www.webaim.org have great web page accessibility information and the dial pad should be an edit box so that the number keys can be used to enter in digits rather than using the arrow keys to find the proper digit to enter.