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Step1. Enter the setup state
Press and hold the key first, and then power on. After power on, keep the key pressed until the "BP" sound is heard for 3 times and then release it (the "BP" sound will be heard once per second) to enter the setting state
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The indicator LED keep blinking to indicate it enter to setting state and it will exit if there is no any action in 10 seconds
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In the setting state, hold on the call button again for 3 seconds to initialize
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Exit the setting state after setup
step1. 进入设置状态
DT616上电10秒内，按住Call键上电并保持3s，直到听到3次”BP”音后松开（每秒会响“BP”一声），指示灯慢闪表示进入主机设置状态；[此状态维持10s，10s内无操作自动退出]
step2. 出厂初始化设置
按一次Call键执行出厂初始化操作，响”BP+”一声长音后完成并退出；
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设置操作
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提示音
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指示灯
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进入设置状态
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响3次BP音
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慢闪
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出厂初始化设置
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BP+长音
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慢闪
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退出设置
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常亮
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, and the indicator light will flash slowly;
Step2. Initialization
Press the Call key once to execute the factory initialization operation, and complete and exit after a long sound of "BP +";