這個東東現在也是要受邀請才可以參加的, 可能就是把電話和電郵聯成一體, 讓你免費打美國國內的電話, 低價的國際電話(有多低,咱也不知道).
Google Voice (formerly GrandCentral) is a telecommunications service by Google[1]
launched on March 11, 2009. The service provisions a U.S. phone number,
chosen by the user from available numbers in selected area codes, free
of charge to each user account. Inbound calls to this number are forwarded
to other phone numbers of the subscriber. Outbound calls may be placed
to domestic and international destinations by dialing the Google Voice
number or from a web-based application.[2] Inbound and outbound calls to US (incl. Alaska and Hawaii) and Canada[3] are free of charge, while international calls are billed according to a schedule posted on the Google Voice website.
The service is configured and maintained by the user in a web-based application, styled after Google's e-mail service, Gmail.
Users must have an established U.S. telephone service to activate
Google Voice. Users must configure this and optionally, additional
phone numbers that ring simultaneously when the Google Voice number
receives a call. The user may answer and receive the call on any of the
ringing phones. Google Voice provides additional features such as voicemail, call history, conference calling, call screening, blocking of unwanted calls, and voice transcription to text of voicemail messages.[4] Received calls may be moved between configured telephones during a call.