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dialling tone
And I can't get a proper dialing tone.
我得不到正常的拨号音。
youdao
Please press 9 first and when you hear the dialing tone, press the number you want.
请先拨9，听到拨号音后再拨您所要的号码。
For outside calls, please press 9 first and when you hear the dialing tone, press the number you want.
㵧打外线请先按9，听到声响后再按您所要的号码。
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