Dahua intercom VTH1550CH NO SOUND from VTO2000a HELP

RF@

n3wb
Joined
Mar 23, 2021
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The Haghue
The speaker from the VTH 1550ch is working I will hear a beap when I touch the letters.
But no sound from the VTO2000a, from inside too outside is working well. But when we are inside we can’t hear outside!! who know this problem everything is working well, only the sound
 
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