Cisco Unified MeetingPlace, Release 6.x -- About DTMF Support in Transfer and Outdial Meetings
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Cisco Unified MeetingPlace, Release 6.x > Cisco Unified MeetingPlace Audio Server > Planning the installation > Telephony and LAN Planning
DTMF recognition in transfer and outdial meetings is not consistently available due to technical restrictions imposed by various telephony configurations. As such, it is not supported by Cisco Unified MeetingPlace.