Samsung A837 Rugby User Manual page 54

Unavailable: This becomes your availability state if you
power-off your phone, turn PTT off, or if the system
detects you have moved out of coverage.
Do Not Disturb: This becomes your availability state if
you change My Availability to Do Not Disturb. In this
state you may place PTT calls but cannot receive a PTT
call.
PTT Message: This icon displays (on your handset only)
in place of your availability status notifying you that a
PTT message is waiting. When this icon displays, press
the PTT key or access the PTT menu from the Idle
screen.
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PTT Contact Availability
This section covers the icons which appear next to individuals
and groups in your PTT Contacts list indicating their availability.
Individuals
Available: This icon lets the User know this person is
logged into the PTT application and can receive PTT calls.
Unavailable: This icon indicates the contact is
unavailable to receive PTT calls, because the contact has
been logged off, is in the power-off state, or it is out of
coverage.
Do Not Disturb: This icon lets the User know this person
has set themselves to Do Not Disturb and cannot receive
a PTT call.
Available/Silent or Vibrate: This icon indicates that the
user set the device to silent or vibrate. The phone receives
calls but they are provided the option to accept/reject a
PTT call.