DTMF Commands

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Lync Server 2010 enables attendees to use DTMF commands when in a conference to control certain features normally visible within a Lync client. For example, users can send DTMF tones that might mute their microphone, play an attendee roll call, or lock the conference. Usually these features can be accessed through a Lync client, but without a visible user interface, DTMF tones must be used. By default, a global configuration of the key mappings is assigned to all users. If required, administrators can modify the global configuration or modify the key mappings on a per-site basis.


Note

There is no method to assign different DTMF key mappings directly to users within the same site, so key mappings are either global or site specific. In addition, the DTMF configuration can be modified only by using the Lync Server Management Shell.


The following DTMF commands are available to assign to phone keys:

AdmitAll—Enables users waiting in the lobby to join the meeting. This key is not enabled by default. Assign a value to enable this feature.

AudienceMuteCommand—Mutes all microphones except the presenter. This key is 4 by default.

CommandCharacter—The key pressed before entering any other DTMF command digits. This key is * by default.

EnableDisableAnnouncementsCommand—Toggles whether entry and exit announcements are played during the meeting. This key is 9 by default.

HelpCommand—Plays a summary of the DTMF commands available to a user. This key is 1 by default.

LockUnlockConferenceCommand—Toggles whether the audio conference is locked or unlocked to allow new participants to join. This key is 7 by default.

MuteUnmuteCommand—Toggles whether the participant’s audio microphone is muted or unmuted. This key is 6 by default.

PrivateRollCallCommand—Plays a roll call of participants only to the user issuing the command. This key is 3 by default.


Tip

If any of these DTMF commands needs to be disabled, assign a $Null value to the parameter.


To set the values, an administrator must use the following Lync Server Management Shell syntax:

Set-CsDialInConferencingDtmfConfiguration –Identity <Global or site:<Site Name>>
-AdmitAll <Digit> -AudienceMuteCommand <Digit> -CommandCharacter <Digit>
-EnableDisableAnnouncementsCommand <Digit> -HelpCommand <Digit>
-LockUnlockConferenceCommand <Digit> -MuteUnmuteCommand <Digit> -PrivateRollCallCommand<Digit>

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