phone alert status service - Bluetooth Development Portal

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BLUETOOTH SPECIFICATION Page 10 of 13Phone Alert Status ServiceThis descriptor can be written using the GATT Write Characteristic Descriptors subprocedure.3.3 Ringer Control Point3.3.1 Characteristic BehaviorIf the Ringer Control Point characteristic is implemented, the server device shall supportat least one of the commands in Table 3.3.CommandMandatory / OptionalSet Silent Mode C.1Cancel Silent Mode C.1Mute Once C.1C.1: Mandatory to support at least one if the Ringer Control Point characteristic isimplementedTable 3.3: Ringer Control Point commandsWhen the Ringer Control Point characteristic is written with a supported value(command), the server device shall perform an action based on the value (command).See Section 4.
BLUETOOTH SPECIFICATION Page 11 of 13Phone Alert Status Service4 Service Behavior“Silent mode”“MuteOnce”“MuteOnce”Ringer SilentRingerNormal“Silent mode”“Cancel Silent mode”“Cancel Silent mode”Table 4.1: Phone Alert Status state diagramThe server device shall implement a state machine with two states, “Ringer Silent” and“Ringer Normal”.The command “Set Silent Mode” shall set the state to “Ringer Silent”.The command “Cancel Silent Mode” shall set the state to “Ringer Normal”.The command “Mute Once” shall silence the server device’s ringer. If the ringer is notactive, the “Mute Once” command shall have no effect. The ringer state is not affectedby the “Mute Once” command.For any other command values (not defined by the characteristic specification [2]), thestate shall not change.The server device’s ringer shall be silenced when the state is “Ringer Silent” and actaccording to <strong>phone</strong> settings when the state is “Ringer Normal”.Note: The Alert Status and Ringer Setting characteristics will reflect the state of the<strong>alert</strong>ing and ringer setting of the server device. These states will normally change whenthe state machine changes or other events (like incoming call or user interaction)happens on the server device. Therefore, the client does not have direct control overthe server’s Ringer Setting through the Ringer Control Point.
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