The Cumulative Update for Lync Server 2010 – June 2012 will include Microsoft Office 365 Lync-to-phone (Lync Online Plan 3). Office 365 Lync-to-phone is a pure-cloud calling service for those who need to work from anywhere.
With Lync-to-phone, users can make and receive phone calls to any number from their laptop or smart phone, via a calling service which is purchased separately from a qualified partner. Jajah is the first available partner (initially only in US and UK). Lync-to-phone in Office 365 includes only a subset of the full enterprise Voice and PBX capabilities of Lync Server.