According to all the keyboard shortcuts for MOC 2007 R2, the only one that comes close is:
Place a call on hold/Resume call. This shortcut is available from the Communicator Conversation window. CTRL + SHIFT + H
Gibt es eine Tastenkombination zum Stummschalten und Stummschalten Ihres Mikrofons in einer MOC 2007 R2-Konferenz?
According to all the keyboard shortcuts for MOC 2007 R2, the only one that comes close is:
Place a call on hold/Resume call. This shortcut is available from the Communicator Conversation window. CTRL + SHIFT + H