User Guide for the Polycom VVX 1500 C Business Media Phone for Cisco Unified Communications Manager (SIP)
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2. Tap the line for which you want to apply Do Not Disturb.
The Do Not Disturb screen displays.
3. Tap the Enable soft key.
The Do Not Disturb icon, , displays on each Line Key for the line you
selected.
The following figure shows Do Not Disturb enabled for one line only.