It appears that there will be an extra CAL (Client Access Licence) for users to choose from when Microsoft OCS Server 14 is released in 2010.
On top of the current Standard and Enterprise CALs, there will also be a Voice CAL which will offer telephony & VOIP services. These features will be removed from the Enterprise CAL and thus the Enterprise CAL will drop in price by around 23%. Also, MS are allowing current OCS customers with SA (Software Assurance) to “grandfather” in the new Voice CAL-if they agree to buy it before July 2009.
Hat Tip to Mary Jo Foley