Ēš A station, which is allowed Do-Not-Disturb, can be placed in the Do-
Not-Disturb state to eliminate CO/IP Line Ringing, ICM Calls, Transfers,
and Paging Announcements.

To activate the DND,

Ēš Press DND button in idle status, the DND LED lights steady.

To remove the DND,

Ēš Press DND button in idle status, the DND LED extinguishes.