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Mute feature
The IP Phone 2001 does not have a fixed Mute key, but a Mute feature is available from the feature list. The Mute feature profile is Hide when idle, therefore the item appears in the display only when the handset is active.
To activate the Mute feature, see "Activating a feature from the menu" (page 35).
To assign the feature to a soft key, see "Assigning a feature to a soft key" (page 36).
Carrier VoIP
Nortel IP Phone 2001 User Guide (CICM)
4 July 2008