This update enables administrators to provide support for the *0 Dual Tone Multi Frequency (DTMF) command in a public switched telephone network (PSTN) dial-in conference in a Microsoft Lync Server 2013 environment. After the update is installed, a PSTN caller is able to be transferred to an operator number that the administrator defines.
To install the cumulative update, go to the following Microsoft website:
2881703 Description of the cumulative update 5.0.8308.556 for the Lync Server 2013, Call Park service: October 2013
To enable this feature, the administrator must provide a valid help desk telephone number in the OperatorLineUri parameter by using the New-CsDialInConferencingDtmfConfiguration cmdlet or the Set-CsDialInConferencingDtmfConfiguration cmdlet.