Motorola iDEN Debut User Manual page 40

option
Message Mail Only: Tones sound during calls for
mail messages; tones for all other types of
messages are held until you end calls.
Delay All: Tones for all types of messages are
held until you end calls.
Note: Delay All is the default setting.
To set notification options during a call press
/ > Call Setup > Notifications.
essentials 35