Users who already have SA on OCS Enterprise CALs or their Microsoft Enterprise CAL Suite only have to keep their contracts current to get the new Voice CAL at no additional charge.

The Three UC Amigos posting said new OCS releases would come in 2010, which matches up with the , and in "2011+." The OCS releases were referred to as Wave 14 and Wave 15.

With Wave 14 there will be three CAL options and combinations: the Standard CAL covers IM and Presence; the Enterprise CAL adds conferencing; and the Voice CAL adds Voice.